一、序

  如题,最近工作中遇到一个移动端用户上传照片,然后在线编辑,添加一些别的图片合成的功能,类似于超级简化版美图秀秀。总结了一下,大致操作包含 上传图片,图片压缩、触摸拖动图片、放大/缩小、添加别的图片进行合成,最后生成一张新图片。功能比较多,问遍了度娘,也没什么系统的有用信息。蛋疼。。。于是挽起袖子自己撸代码。此过程略痛苦,手机型号不同,兼容性问题比较多。这个我会一一细说。

  额外话,这个demo还涉及到  微信分享,手机验证码,这些代码也没有删,感兴趣的可以看看。

  废话不多说,下面是目录。先看效果图,然后我再简单说说实现过程,把源码贴出来, 有需要的可以去我的 github 下载源码。

 

二、目录

  1.效果图

  2.原理


  3.问题分析、解决方案


  4.demo下载

 

1.效果图

 

2.原理

  图片处理,直接想到 canvas , 这里也是用画布来做的,分析下流程需要上传、编辑、生成新图 这3个步骤。

  a. 上传。 input 文件上传,然后将上传的文件转换为 base64 的格式,这里主要做图片的处理。

  b. 压缩。通过画布将上传的图片进行等比例压缩,图片一般会压缩到100KB左右,具体的看宽高设置,会大、会小。不压缩,无法在线编辑,图片太大了,会卡的要命。

  c. 拖拽。将图片设置为背景图,捕捉 touch 坐标,进行计算,调整图片的横纵坐标。此 demo 电脑手机通用,只需要将 touch 部分的坐标值改成 mouseX,mouseY 或者 clientX、clientY即可。

  d. 图片的裁剪、放大、缩小,旋转。裁剪是根据背景图的坐标,设置画布大小裁剪图片。缩放、旋转,canvas有api,主要做数据的计算。这里这些操作没有采用touch的手势计算。因为我的素材很小,手指操作不方便。所以加的按钮,如果想做手势的逻辑类似,做一下坐标转换即可。

  d. 图片合成。还是canvas的api,添加图片,然后编辑一番,最终保存成base64,传给后台,生成一张图片,本地生成没办法直接使用。所以配合服务端生成最合适。

  e. demo引入了 jQuery ,请使用1.1以上版本的 jQuery ,我用的是 jquery-1.11.3.min.js 。

 

3.问题分析、解决方案

 现在说一下做这个东西遇到的问题,也说明一下为什么会写这么多代码

  a、canvas 兼容性,IOS8.0 以上,低了貌似都不支持。安卓不太清楚,低级版本肯定是不行了。市面上的手机基本都是OK的。

  b、reader.readAsDataURL(oFile)  手机上传图片,iOS不支持 FileReader 的onload回调,无奈,加了 setTimeout 做延时处理。

  c、手机上传的图片有横屏的,有竖屏的。超级麻烦,导致我们不知道哪个是宽,而且默认展示总不能倒着展示吧。这里引入 exif.js 这个js包可以判断照片的拍摄角度。牛逼啊。拿到拍摄角度之后,我们就可以放到画布里面,再把它旋转,压缩一下。就OK了。

  d、手机的图片太大。现在手机照片动不动就好几MB,画布处理图片是转化成base64计算的,想想吧,一张几兆的图,转换成base64,还得大20%左右,用它编辑,页面一般就卡死了。所以上传成功后,先把图片用画布压缩到100KB以内,这个大小清晰度和处理速度是比较合适的。

  e、压缩图片的时候还有个问题。canvas 的实际大小一定是显示大小的2倍,这样图片才不会是真,否则,你会发现你的图片超级模糊,和马赛克差不多了。

  f、图片移动,这个比较简单了,就是注意移动端、PC端获取到事件对象后,坐标属性名不同,记得别搞错了。

  g、最后图片的生成。canvas 最终生成的是base64,他可以直接保存成图片,不过保存之后我们就取不到了,所以建议发到服务端,服务端生成,返回公网链接。

4.demo下载

  以上就是整个项目了,有什么问题,可以评论区留言。

  源代码,我会上传到 github ,如果帮到你了,记得给个 star 奥。 github地址:   https://github.com/Aaron-China/imgMaking

 

核心代码:

(function (win) {
  var obj = {
    a: 1,
    oldX: "",
    oldY: "",
    ratio: 1,
    ratioBig: 0,
    jsonUrl: \'https://xxxxxxx/api/xxxx\',
    radioSmall: 0,
    num: 1,
    setWidth: 432,    //图片需要压缩到的尺寸   216,135
    theDataBase: "",
    yaSuoBase64: "",
    hcBase64: "",
    image: new Image(),    //放到画布的img
    bookCode: 12221212,
    flag: true,
    bodyWidth: \'\',
    bodyHeight: \'\',
    ifImgUpload: false,
    base64Zong: "",
    imgNewName: "",
//首页的js。横竖屏、微信分享、滑动跳转
    page1Init: function () {
      var w = this;
      if ($(win).width() >= $(win).height()) {
        w.bodyWidth = parseInt($(window).height()) + 64;
        w.bodyHeight = $(window).width();
        $(\'body,html\').width(w.bodyWidth);
        $(\'body,html\').height(w.bodyHeight);
      } else {
        w.bodyWidth = $(window).width();
        w.bodyHeight = $(window).height();
        $(\'body,html\').width(w.bodyWidth);
        $(\'body,html\').height(w.bodyHeight);
      }

      window.addEventListener("onorientationchange" in window ? "orientationchange" : "resize", function () {
        if (window.orientation === 180 || window.orientation === 0) {
          $(\'body,html\').width(bodyWidth);
          $(\'body,html\').height(bodyHeight);
        }
        if (window.orientation === 90 || window.orientation === -90) {
          $(\'body,html\').width(bodyWidth);
          $(\'body,html\').height(bodyHeight);
        }
      }, false);

      // 初始化微信分享的
      // w.wxConfig();
      // w.wxReady();

      var oldX = 0, oldY = 0;
      $("body").on("touchstart", imgTouchStart);
      $("body").on("touchmove", imgTouchMove);

      //手指按下时,捕捉事件,取坐标值,设置参数
      function imgTouchStart(e) {
        //阻止事件冒泡的
        e.stopImmediatePropagation();
        oldX = e.originalEvent.touches[0].clientX;
        oldY = e.originalEvent.touches[0].clientY;
      }

      function imgTouchMove(e) {
        e.stopImmediatePropagation();
        var x = e.originalEvent.touches[0].clientX - oldX;
        var y = e.originalEvent.touches[0].clientY - oldY;
        if (y < -150) {
          window.location.href = \'getBooks.html?\';
        }
      }
    },

//上传照片页的js。横竖屏、微信分享、上传照片
    page2Init: function () {
      var w = this;
      if ($(win).width() >= $(win).height()) {
        w.bodyWidth = parseInt($(window).height()) + 64;
        w.bodyHeight = $(window).width();
        $(\'body,html\').width(w.bodyWidth);
        $(\'body,html\').height(w.bodyHeight);
      } else {
        w.bodyWidth = $(window).width();
        w.bodyHeight = $(window).height();
        $(\'body,html\').width(w.bodyWidth);
        $(\'body,html\').height(w.bodyHeight);
      }

      window.addEventListener("onorientationchange" in window ? "orientationchange" : "resize", function () {
        if (window.orientation === 180 || window.orientation === 0) {
          $(\'body,html\').width(bodyWidth);
          $(\'body,html\').height(bodyHeight);
        }
        if (window.orientation === 90 || window.orientation === -90) {
          $(\'body,html\').width(bodyWidth);
          $(\'body,html\').height(bodyHeight);
        }
      }, false);

      // w.wxConfig();
      // w.wxReady3();

      //上传图片进行处理
      w.uploadImg();

      if (localStorage.getItem("imgFlag") == "true") {
        $(".f-scInLock").hide();
      }

      //选好照片,准备制作
      $(\'.m-loadBtn\').on("tap", function () {
        $(\'.m-loadBtn\').css({"color": "#C64100"});
        setTimeout(function () {
          $(\'.m-loadBtn\').css({"color": "white"});
        }, 300);
        if (w.ifImgUpload == true) {
          $(\'.g-wrap2\').hide();
          $(\'.g-wrap3\').show();
          $("#m-loadImg").attr("src", w.yaSuoBase64);
        } else {
          $(\'.j-pop p\').text("还没有选择喜欢照片吆!");
          $(\'.j-pop\').show();
          setTimeout(function () {
            $(\'.j-pop\').hide();
          }, 1500);
        }
      });

      $(".m-step1 .f-scIn1").on("tap", function () {
        $(".m-sucaiOut").show();
        $(".m-sucaiOut").css({"width": "70px", "opacity": "1"});
        $(".m-imgBox .f-sucai").attr("src", "img/sucai1.png");
      });
      $(".m-step1 .f-scIn2").on("tap", function () {
        $(".m-sucaiOut").show();
        $(".m-sucaiOut").css({"width": "70px", "opacity": "1"});
        $(".m-imgBox .f-sucai").attr("src", "img/sucai2.png");
      });
      $(".m-step1 .f-scIn3").on("tap", function () {
        var sucai3 = localStorage.getItem("imgFlag");
        if (sucai3 == "true") {
          $(".m-sucaiOut").show();
          $(".m-sucaiOut").css({"width": "70px", "opacity": "1"});
          $(".m-imgBox .f-sucai").attr("src", "img/sucai3.png");
        } else {
          $(\'.j-pop p\').text("分享后可解锁吆!");
          $(\'.j-pop\').show();
          setTimeout(function () {
            $(\'.j-pop\').hide();
          }, 1500);
        }
      })
      $(".f-sucaiDelete").on("tap", function () {
        $(".m-sucaiOut").css({"width": "1px", "opacity": "0", "top": "4px", "left": "100px"});
        $(".m-imgBox .f-sucai").attr("src", "img/wu.png");
      });


      $(".m-step2 .f-scIn1").on("tap", function () {
        $(".imgKuang .imgK").attr("src", "img/sucai4.png");
      });
      $(".m-step2 .f-scIn2").on("tap", function () {
        $(".imgKuang .imgK").attr("src", "img/sucai5.png");
      });


      $(".m-makeBtn").on("tap", function () {
        $("#loadingSection").show();
        setTimeout(function () {
          $("#loadingSection").hide();
        }, 1800);

        w.imageMake();
      });

      $(".m-getBtn").on("tap", function () {
        $(".m-login").show();
        $(".m-mengBan").show();
      });
      $(".m-closeLogin").on("tap", function () {
        $(".m-login").hide();
        $(".m-mengBan").hide();
      });

      $(".wx-share").on("tap", function () {
        $(".wx-share").hide();
        $(".m-mengBan").hide();
      });

      $(".m-oldManBtn").on("tap", function () {
        $(".wx-share").show();
        $(".m-mengBan").show();
        w.sendImgSouce();
        w.wxReady2();
      });

      w.initEvent();
    },


    resize: function () {},

    wxConfig: function () {
      var w = this;
      var jsapi_ticket, nonceStr, signature, timestamp, getCode;
      var url = \'http://xxxxxxx/\'; //正式库
      //获取config配置
      var Url = window.location.href;
      $.ajax({
        type: \'get\',
        url: \'http:/xxxxxxx\',
        data: {
          weixinurl: Url
        },
        timeout: 10000, //10秒超时
        callbackParameter: \'callback\',
        async: false,
        jsonp: "jsonpcallback",
        success: function (o) {
          jsapi_ticket = o.jsapi_ticket;
          nonceStr = o.nonceStr;
          signature = o.signature;
          timestamp = o.timestamp;
        }
      });
      wx.config({
        debug: false, // 开启调试模式,调用的所有api的返回值会在客户端alert出来,若要查看传入的参数,可以在pc端打开,参数信息会通过log打出,仅在pc端时才会打印。
        appId: \'xxxxxxxxx\', // 必填,公众号的唯一标识
        timestamp: timestamp, // 必填,生成签名的时间戳
        nonceStr: nonceStr, // 必填,生成签名的随机串
        signature: signature, // 必填,签名,见附录1
        jsApiList: [
          \'checkJsApi\',
          \'onMenuShareTimeline\',
          \'onMenuShareAppMessage\',
          \'onMenuShareQQ\',
          \'onMenuShareWeibo\',
          \'onMenuShareQZone\',
          \'hideMenuItems\',
          \'showMenuItems\',
          \'hideAllNonBaseMenuItem\',
          \'showAllNonBaseMenuItem\',
          \'translateVoice\',
          \'startRecord\',
          \'stopRecord\',
          \'onVoiceRecordEnd\',
          \'playVoice\',
          \'onVoicePlayEnd\',
          \'pauseVoice\',
          \'stopVoice\',
          \'uploadVoice\',
          \'downloadVoice\',
          \'chooseImage\',
          \'previewImage\',
          \'uploadImage\',
          \'downloadImage\',
          \'getNetworkType\',
          \'openLocation\',
          \'getLocation\',
          \'hideOptionMenu\',
          \'showOptionMenu\',
          \'closeWindow\',
          \'scanQRCode\',
          \'chooseWXPay\',
          \'openProductSpecificView\',
          \'addCard\',
          \'chooseCard\',
          \'openCard\'
        ] // 必填,需要使用的JS接口列表,所有JS接口列表见附录2
      });
    },
    wxReady: function () {
      wx.ready(function () {
        wx.onMenuShareAppMessage({
          title: \'嘿,我愿意做你的圣诞老人!\', // 分享标题
          link: \'http://xxxxxxxxx/index.html\', // 分享链接
          desc: \'叮叮当,叮叮当,今年你愿意做我的圣诞老人吗……\',
          imgUrl: \'http://xxxxxxx/wxbanner.png\', // 分享图标
          trigger: function (res) {
          },
          success: function (res) {
            localStorage.setItem("imgFlag", "true");
          },
          cancel: function (res) {
          }
        });
        //alert(\'已注册获取“发送给朋友圈”状态事件\');
        wx.onMenuShareAppMessage({
          title: \'嘿,我愿意做你的圣诞老人!\', // 分享标题
          link: \'http://xxxxxxx/index.html\', // 分享链接
          desc: \'叮叮当,叮叮当,今年你愿意做我的圣诞老人吗……\',
          imgUrl: \'http://xxxxxxx/wxbanner.png\', // 分享图标
          trigger: function (res) {
          },
          success: function (res) {
            localStorage.setItem("imgFlag", "true");
          },
          cancel: function (res) {
          }
        });
      });
    },
    wxReady3: function () {
      wx.ready(function () {
        wx.onMenuShareAppMessage({
          title: \'嘿,我愿意做你的圣诞老人!\', // 分享标题
          link: \'http://xxxxxx/index.html\', // 分享链接
          desc: \'叮叮当,叮叮当,今年你愿意做我的圣诞老人吗……\',
          imgUrl: \'http://xxxxxxxxx/wxbanner.png\', // 分享图标
          trigger: function (res) {
          },
          success: function (res) {
            localStorage.setItem("imgFlag", "true");
            $(".f-scInLock").hide();
            $(".f-scInLock").css({"width": "0px", "height": "0px", "display": "none"});
          },
          cancel: function (res) {
          }
        });
        //alert(\'已注册获取“发送给朋友圈”状态事件\');
        wx.onMenuShareAppMessage({
          title: \'嘿,我愿意做你的圣诞老人!\', // 分享标题
          link: \'http://xxxxxxx/index.html\', // 分享链接
          desc: \'叮叮当,叮叮当,今年你愿意做我的圣诞老人吗……\',
          imgUrl: \'http://xxxxxxx/img/wxbanner.png\', // 分享图标
          trigger: function (res) {
          },
          success: function (res) {
            localStorage.setItem("imgFlag", "true");
            $(".f-scInLock").hide();
            $(".f-scInLock").css({"width": "0px", "height": "0px", "display": "none"});
          },
          cancel: function (res) {
          }
        });
      });
    },
    wxReady2: function () {
      var w = this;
      wx.ready(function () {
        wx.onMenuShareAppMessage({
          title: \'嘿,我愿意做你的圣诞老人!\', // 分享标题
          link: \'http://xxxxxxx/sharePage.html?imgName=\' + w.imgNewName, // 分享链接
          desc: \'叮叮当,叮叮当,今年你愿意做我的圣诞老人吗……\',
          imgUrl: \'http://xxxxx/img/wxbanner.png\', // 分享图标
          trigger: function (res) {
          },
          success: function (res) {
            localStorage.setItem("imgFlag", "true");
            $(".wx-share").hide();
            $(".m-mengBan").hide();
            $(".f-scInLock").hide();
            $(".f-scInLock").css({"width": "0px", "height": "0px", "display": "none"});
          },
          cancel: function (res) {
          }
        });
        //alert(\'已注册获取“发送给朋友圈”状态事件\');
        wx.onMenuShareAppMessage({
          title: \'嘿,我愿意做你的圣诞老人!\', // 分享标题
          link: \'http://xxxxx/sharePage.html?imgName=\' + w.imgNewName, // 分享链接
          desc: \'叮叮当,叮叮当,今年你愿意做我的圣诞老人吗……\',
          imgUrl: \'http://xxxxxx/img/wxbanner.png\', // 分享图标
          trigger: function (res) {
          },
          success: function (res) {
            localStorage.setItem("imgFlag", "true");
            $(".wx-share").hide();
            $(".m-mengBan").hide();
            $(".f-scInLock").hide();
            $(".f-scInLock").css({"width": "0px", "height": "0px", "display": "none"});
          },
          cancel: function (res) {
          }
        });
      });
    },


    //照片上传函数
    uploadImg: function () {
      var w = this;
      var loadFile = document.getElementById("file");
      loadFile.addEventListener("change", function () {
        $(".m-thewen33").hide();
        $(".m-thewen").show();

        $(".f-theImg").css({"width": "100%"});
        w.ifImgUpload = true;

        $("#loadingSection").show();
        setTimeout(function () {
          $("#loadingSection").hide();
        }, 2700);

        var oFile = loadFile.files[0];
        console.log(oFile);
        if (!new RegExp("(jpg|jpeg|png)+", "gi").test(oFile.type)) {
          alert("照片上传:文件类型必须是JPG、JPEG、PNG");
          return;
        }
        //新建一个文件对象
        var reader = new FileReader();
        //读出这个文件的 base64 的数据流,这个函数是专门转base64的,不加他,下面没法用base64
        reader.readAsDataURL(oFile);

        //因为  iOS 不支持 FileReader 的onload回调,所以,这里只能加延迟处理了
        setTimeout(function () {
          //先取照片的拍摄方向角
          EXIF.getData(oFile, function () {
            EXIF.getAllTags(this);
            var zzz = EXIF.getTag(this, \'Orientation\');
            var spanData = document.getElementsByClassName("tspanme");
            if (zzz == 1 || zzz == undefined) {
              spanData[0].innerText = 0;
//                            alert("0度");
//                            console.log("0度");
            } else if (zzz == 6) {
              spanData[0].innerText = 90;
//                            alert("90度");
//                            console.log("90度");
            } else if (zzz == 8) {
              spanData[0].innerText = 270;
//                            alert("270度");
//                            console.log("270度");
            } else if (zzz == 3) {
              spanData[0].innerText = 180;
//                            alert("180度");
//                            console.log("180度");
            }
          });


          var img = new Image();
          img.src = reader.result;
          //根据拍摄角度不同,把图片旋转适当角度,纠正图片
          //除了修改方向,不做其他任何修改
          setTimeout(function () {
            var spanData = document.getElementsByClassName("tspanme");
            var theText = spanData[0].innerText;

            console.log("这个保存的角度" + theText);
            var canvas = document.createElement("canvas");
            var cantent = canvas.getContext("2d");
            var width = img.naturalWidth,
              height = img.naturalHeight;

            if (theText == 0) { //0
              canvas.width = width;
              canvas.height = height;
              cantent.drawImage(img, 0, 0, width, height, 0, 0, width, height);
              console.log("0");
            } else if (theText == 90) {
              canvas.width = height;
              canvas.height = width;
              cantent.save();
              cantent.rotate(90 * Math.PI / 180);
              cantent.drawImage(img, 0, -height);
              cantent.restore();
              console.log("90");
            } else if (theText == 180) {
              canvas.width = width;
              canvas.height = height;
              cantent.save();
              cantent.rotate(180 * Math.PI / 180);
              cantent.drawImage(img, -width, -height);
              cantent.restore();
              console.log("180");
            } else if (theText == 270) {
              canvas.width = height;
              canvas.height = width;
              cantent.save();
              cantent.rotate(270 * Math.PI / 180);
              cantent.drawImage(img, -width, 0);
              cantent.restore();
              console.log("270");
            }
            w.theDataBase = canvas.toDataURL();
            setTimeout(function () {
              w.yaSuoImg();
            }, 200);
          }, 300);
        }, 400);
      })
    },


    //处理图片的函数
    imageMake: function () {
      var w = this,
        theAngle = 0,
        imgHat = document.getElementsByClassName("f-sucai")[0];

      theAngle = getEletAngle();
      console.log("当前素材的角度:" + theAngle);

      var canvasHat = document.createElement("canvas"),
        cantentHat = canvasHat.getContext("2d"),
        widthHat = imgHat.naturalWidth,
        heightHat = imgHat.naturalWidth;

      console.log(widthHat);
      console.log(heightHat);
      console.log(theAngle);
      canvasHat.width = widthHat;
      canvasHat.height = heightHat;
      cantentHat.save();
      cantentHat.translate(widthHat / 2, heightHat / 2);
      cantentHat.rotate(theAngle * Math.PI / 180);
      cantentHat.translate(-widthHat / 2, -heightHat / 2);
      cantentHat.drawImage(imgHat, 0, 0);
      cantentHat.restore();

      imgHat.src = canvasHat.toDataURL();

      setTimeout(function () {
        var img1 = document.getElementById("m-loadImg"),
          width = img1.naturalWidth,
          height = img1.naturalHeight,
          canvas = document.createElement("canvas"),
          cantent = canvas.getContext("2d"),
          oldTop = $("#m-loadImg")[0].offsetTop,
          oldLeft = $("#m-loadImg")[0].offsetLeft,
          imgK = document.getElementsByClassName("imgK")[0],
          imgKuangOut = document.getElementsByClassName("imgKuang")[0],
          imgSuCai = document.getElementsByClassName("f-sucai")[0],
          imgSuCaiOut = document.getElementsByClassName("m-sucaiOut")[0],

          //缩放之后图片的宽度
          scWidth = imgSuCai.width,
          scHeight = imgSuCai.height,

          scOffsetTop = imgSuCaiOut.offsetTop,
          scOffsetLeft = imgSuCaiOut.offsetLeft;

        // console.log("------------------------");
        // console.log(imgSuCai);
        // console.log(imgSuCaiOut);
        // console.log(scWidth);
        // console.log(scHeight);
        // console.log(scOffsetTop);
        // console.log(scOffsetLeft);

        canvas.width = 270;
        canvas.height = 194;

        // console.log("原大小:");
        // console.log(img1.naturalWidth);
        // console.log(img1.naturalHeight);
        // console.log(imgK.naturalWidth);
        // console.log(imgK.naturalHeight);


        // console.log("相框的上定位" + imgK.offsetTop);
        // console.log("相框的下定位" + imgK.offsetLeft);
        //
        // console.log("插入素材的数据:");
        // console.log(scWidth);
        // console.log(scHeight);
        // console.log(scOffsetTop);
        // console.log(scOffsetLeft);


        var yasuobi = width / 270;
        // console.log("压缩之后的宽度" + width);
        // console.log("position的上定位" + oldTop);
        // console.log("position的左定位" + oldLeft);

//                alert(-oldLeft*yasuobi+"水平位移");
//                alert(-oldTop*yasuobi+"垂直位移");


        setTimeout(function () {
          //画上照片
          cantent.drawImage(img1, 0, 0, width, height, oldLeft, oldTop, 270, height / yasuobi);
          //画上素材
          cantent.drawImage(imgSuCai, 0, 0, imgSuCai.naturalWidth, imgSuCai.naturalHeight, scOffsetLeft, scOffsetTop, scWidth, scHeight);
          //画上相框
          cantent.drawImage(imgK, 0, 0, imgK.naturalWidth, imgK.naturalHeight, imgKuangOut.offsetLeft, imgKuangOut.offsetTop, imgK.width, imgK.height);
          w.hcBase64 = canvas.toDataURL();


          //做最终的合成
          var imgZong = new Image();
          imgZong.src = w.hcBase64;

          setTimeout(function () {
            var canvas111 = document.createElement("canvas"),
              cantent111 = canvas111.getContext("2d"),
              imgKuangTrue = document.getElementById("g-kuangTrue"),
              theEWM = document.getElementById("g-ewm");

            canvas.width = 326.5;
            canvas.height = 335;

            cantent.drawImage(imgKuangTrue, 0, 0, imgKuangTrue.naturalWidth, imgKuangTrue.naturalHeight, 0, 0, 326.5, 335);
            cantent.drawImage(imgZong, 0, 0, imgZong.naturalWidth, imgZong.naturalHeight, 28, 47, 270, 194);
            cantent.drawImage(theEWM, 0, 0, theEWM.naturalWidth, theEWM.naturalHeight, 236, 249, 64, 64);
            w.base64Zong = canvas.toDataURL();
            setTimeout(function () {
              $(".g-wrap3").hide();
              $(".g-wrap4").show();
              $(".f-shuchu").attr("src", w.base64Zong);
            }, 400)
          }, 500)
          // console.log("合成的图片");
          //console.log(w.theDataBase.length/1024+"KB");
        }, 400)

      }, 700)
    },


    //压缩函数
    yaSuoImg: function () {
      var w = this;
      yaWidth = w.setWidth / 2,    //  yaWidth  这个是实际照片一半的大小,通过设置它实现压缩
        canvas = document.createElement("canvas"),
        cantent = canvas.getContext("2d"),
        img = new Image();
      img.src = w.theDataBase;
      //这个iOS是支持的,iOS不支持的是file对象的onload函数
      img.onload = function () {
        var width = img.naturalWidth,
          height = img.naturalHeight,
          //图片的压缩比
          theRadio = img.naturalWidth / yaWidth;
        //如果图片尺寸小于设定画布的尺寸,不压缩,输出原图
        if (theRadio <= 1) {
          theRadio = 1;
          canvas.width = img.naturalWidth;
          canvas.height = img.naturalHeight;
          canvas.style.width = img.naturalWidth / 2 + "px";
          canvas.style.height = img.naturalHeight / 2 + "px";
          cantent.drawImage(img, 0, 0, width, height, 0, 0, width, height);
        } else {
          //为了避免失真,canvas实际大小设置为显示大小的2倍
          canvas.width = yaWidth * 2;
          canvas.height = (height / theRadio) * 2;
          canvas.style.width = yaWidth + "px";
          canvas.style.height = height / theRadio + "px";
          //注意,图片要取实际大小裁剪,但是显示大小选择和canvas同样的大小,这样显示的不失真、小,但实际的大。不失真
          cantent.drawImage(img, 0, 0, width, height, 0, 0, yaWidth * 2, height / theRadio * 2);
          console.log("压缩之后的图片大小,宽:  " + yaWidth * 2 + "高:  " + height / theRadio * 2);
        }

        // console.log("************************");
        // console.log(theRadio);
        // console.log(width);
        // console.log(height);
        // console.log(yaWidth * 2);
        // console.log((height / theRadio) * 2);
        w.yaSuoBase64 = canvas.toDataURL();
        setTimeout(function () {
          $(".g-wrap2 .f-theImg").attr("src", w.yaSuoBase64);
          // console.log("压缩之后大小");
          // console.log(w.yaSuoBase64.length / 1024 + "KB");
//                    alert("压缩之后大小:"+w.yaSuoBase64.length/1024+"KB");
        }, 200)
      };
    },


    initEvent: function () {
      var w = this;
      $(\'.getCode\').on(\'tap\', function () {
        $(\'.m-phone\').blur();
        $(\'.m-code\').blur();
        var phoneNum = $(\'.m-phone\').val();
        if (phoneNum == \'\') {
          $(\'.j-pop\').fadeIn();
          $(\'.j-pop p\').text(\'手机号不能为空\');
          setTimeout(function () {
            $(\'.j-pop\').fadeOut();
          }, 2000);
          return false;
        } else if (!/^1[3|4|5|7|8][0-9]{9}$/.test(phoneNum)) {
          $(\'.j-pop\').fadeIn();
          $(\'.j-pop p\').text(\'手机号格式不正确\');
          setTimeout(function () {
            $(\'.j-pop\').fadeOut();
          }, 2000);
          return false;
        }
        if (w.flag == true) {
          w.codeAjax();
          var time = 60;
          $(\'.getCode\').attr("disabled", "disabled");
          w.flag = false;
          var t = setInterval(function () {
            time--;
            $(\'.getCode\').text(time + "s后再发送");
            $(\'.getCode\').css("background", \'#EFEFEF\');
            $(\'.getCode\').css("color", \'gray\');
            if (time == 0) {
              $(\'.getCode\').removeAttr(\'disabled\');
              clearInterval(t);
              $(\'.getCode\').text("获取验证码");
              w.flag = true;
              $(\'.getCode\').css("color", \'#CB402F\');
            }
          }, 1000);
        }
      });
      $(\'.m-getBook\').on(\'tap\', function () {
        var codeTxt = $(\'.m-code\').val();
        var phoneNum = $(\'.m-phone\').val();
        if (phoneNum == \'\') {
          $(\'.j-pop\').fadeIn();
          $(\'.j-pop p\').text(\'手机号不能为空\');
          setTimeout(function () {
            $(\'.j-pop\').fadeOut();
          }, 2000);
        } else if (codeTxt == \'\') {
          $(\'.j-pop\').fadeIn();
          $(\'.j-pop p\').text(\'验证码不能为空\');
          setTimeout(function () {
            $(\'.j-pop\').fadeOut();
          }, 2000);
          return false;
        } else if (/^1[3|4|5|7|8][0-9]{9}$/.test(phoneNum) && codeTxt != "") {
          $.ajax({
            type: \'post\',
            url: w.jsonUrl,
            data: "method=xxxx" + "&content=" + JSON.stringify({
              customerName: phoneNum,
              sendBookActivityCode: w.bookCode,
              checkCode: codeTxt
            }),
            callbackParameter: \'callback\',
            async: true,
            jsonp: "jsonpcallback",
            success: function (o) {
              if (o.status == 1) {
                $(\'.j-pop\').fadeIn();
                $(\'.j-pop p\').text(\'领取成功!\');
                setTimeout(function () {
                  $(\'.j-pop\').fadeOut();
                  window.location.href = "http://xxxxx";
                }, 800);
              } else if (o.status == 2) {
                $(\'.j-pop\').fadeIn();
                $(\'.j-pop p\').text("您已领取过该书籍");
                setTimeout(function () {
                  $(\'.j-pop\').fadeOut();
                  window.location.href = "http://xxxx";
                }, 2000);
              }
            }
          });

        } else if (!/^1[3|4|5|7|8][0-9]{9}$/.test(phoneNum)) {
          $(\'.j-pop\').fadeIn();
          $(\'.j-pop p\').text(\'手机号错误\');
          setTimeout(function () {
            $(\'.j-pop\').fadeOut();
          }, 2000);
        }
      });
    },

    codeAjax: function () {
      var w = this;
      var phoneNum = $(\'.m-phone\').val();
      if (/^1[3|4|5|6|7|8][0-9]{9}$/.test(phoneNum)) {
        $.ajax({
          type: \'post\',
          url: w.jsonUrl,
          timeout: 2000, //10秒超时
          data: "method=xxxx" + "&content=" + JSON.stringify({
            mobileNum: phoneNum,
            type: \'LOGIN_CHECK\'
          }),
          callbackParameter: \'callback\',
          async: false,
          jsonp: "jsonpcallback",
          success: function (o) {
            if (o.status == 1) {
              $(\'.j-pop\').fadeIn();
              $(\'.j-pop p\').text(\'短信发送成功\');
              setTimeout(function () {
                $(\'.j-pop\').fadeOut();
              }, 2000);
            } else if (o.status == 0) {
              if (o.code == "10002006") {
                $(\'.j-pop\').fadeIn();
                $(\'.j-pop p\').text(\'请求过于频繁,一分钟只能请求一次\');
                setTimeout(function () {
                  $(\'.j-pop\').fadeOut();
                }, 2000);
              } else if (o.code == "10002003") {
                $(\'.j-pop\').fadeIn();
                $(\'.j-pop p\').text(\'短信发送失败\');
                setTimeout(function () {
                  $(\'.j-pop\').fadeOut();
                }, 2000);
              }
            }
          }
        });
      } else {
        $(\'.j-pop\').fadeIn();
        $(\'.j-pop p\').text(\'手机号格式不正确\');
        setTimeout(function () {
          $(\'.j-pop\').fadeOut();
        }, 2000);
      }
    },

    //上传做好的图片,并获取后台生成的图片路径
    sendImgSouce: function () {
      var w = this;
      console.log("开始上传");
      $.ajax({
        type: \'post\',
        url: \'http://xxxxxxx/upload/activityBase64\',
        data: {
          pictureStream: w.hcBase64,
          activityId: "1508342400"
        },
        timeout: 10000, //10秒超时
        callbackParameter: \'callback\',
        async: false,
        jsonp: "jsonpcallback",
        success: function (o) {
          console.log("回调");
          console.log(o);
          var b = o.data.split("?");
          var c = b[0].split("event/");
          w.imgNewName = c[1];
          console.log(w.imgNewName);
        }
      });
      console.log("上传成功");
    }

  }
  win.page = obj;
})(window)
//图片操作获取具体数据的函数
function imageMaker(eleID,otherID){
    var oldX=0,
        oldY=0,
        ratio=1;
        
    $(""+eleID+"").on("touchstart",imgTouchStart);
    $(""+eleID+"").on("touchmove",imgTouchMove);
    $(""+eleID+"").on("touchend",imgTouchEnd);
    
    //手指按下时,捕捉事件,取坐标值,设置参数
    function imgTouchStart(e){
        //阻止事件冒泡的
        e.stopImmediatePropagation();
        e.preventDefault(); 
        $(""+eleID+"").attr("draggable",true);

        oldX = e.originalEvent.touches[0].clientX;
        oldY = e.originalEvent.touches[0].clientY;
    }
        
    function imgTouchMove(e){
        e.stopImmediatePropagation();
        //阻止事件冒泡,避免,移动照片时,整个页面也会随滚动条移动
        e.preventDefault();
        if($(""+eleID+"").attr("draggable")) {
            var x = e.originalEvent.touches[0].clientX - oldX;
            var y = e.originalEvent.touches[0].clientY - oldY;
            var oldTop = $(""+eleID+"")[0].offsetTop;
            var oldLeft = $(""+eleID+"")[0].offsetLeft;
            var NewTop = y + parseInt(oldTop);
            var newLeft = x + parseInt(oldLeft);
            $(""+eleID+"").css({"top":NewTop+"px","left":newLeft+"px"});
            oldX = e.originalEvent.touches[0].clientX;
            oldY = e.originalEvent.touches[0].clientY;
        }
    }
    
    //手指拿开时,设置参数
    function imgTouchEnd(e) {
        e.stopImmediatePropagation();
        e.preventDefault();
        $(""+eleID+"").attr("draggable",false);
    }
    
    
    $(".shape1").on("touchstart",function(e){
        setImgSmall();
    });
    
    $(".shape3").on("touchstart",function(e){
        setImgBig();
    });
    
    $(".shape2").on("touchstart",function(e){
        setImgAngle();
    });
    
    //放大、缩小的
    function setImgBig() {
        var width = parseInt($(""+otherID+"").width()) * 1.03;
        var height = parseInt($(""+otherID+"").height()) * 1.03;

        $(""+otherID+"").css({
            \'width\': width+"px",
            \'height\': height+"px",
        });
        console.log("打印我"+width);
    }
    
    function setImgSmall() {
        var width = parseInt($(""+otherID+"").width()) * 0.97;
        var height = parseInt($(""+otherID+"").height()) * 0.97;

        $(""+otherID+"").css({
            \'width\': width+"px",
            \'height\': height+"px",
        });
    }
    
    function setImgAngle(){
        //这里只取图片的角度,值旋转图片。外框不做操作了
        var theAngle = getEletAngle();
        var angleNow = theAngle+10;
        $(".f-sucai").css({\'transform\': "rotate("+angleNow+"deg)"});
    }
}


//获取元素旋转角度
    function getEletAngle(eletClass){
        var el = document.getElementsByClassName("f-sucai")[0];
        console.log(el);
        var st = window.getComputedStyle(el, null);
        var tr = st.getPropertyValue("-webkit-transform") ||
            st.getPropertyValue("-moz-transform") ||
            st.getPropertyValue("-ms-transform") ||
            st.getPropertyValue("-o-transform") ||
            st.getPropertyValue("transform") ||
            "FAIL";
        //console.log(\'Matrix: \' + tr);
        var values = tr.split(\'(\')[1].split(\')\')[0].split(\',\');
        var a = values[0];
        var b = values[1];
        var angle = Math.round(Math.atan2(b, a) * (180 / Math.PI));
        //console.log(\'Rotate: \' + angle + \'deg\');
        return angle;
    }

 

版权声明:本文为pengfei-nie原创文章,遵循 CC 4.0 BY-SA 版权协议,转载请附上原文出处链接和本声明。
本文链接:https://www.cnblogs.com/pengfei-nie/p/7725005.html