微信小程序收藏功能实现

/收藏/
var postsCollected = wx.getStorageSync('posts_Collected')
if (postsCollected){
var postCollected = postsCollected[postId]
this.setData({
collected:postCollected
})
}
else{
var postsCollected = {}
postsCollected[postId] = false;
wx.setStorageSync('posts_Collected', postsCollected );
}
},
onColletionTap:function(event){
var postsCollected = wx.getStorageSync('posts_Collected');
var postCollected = postsCollected[this.data.currentPostId];
//收藏变成未收藏，未收藏变成收藏
postCollected = !postCollected;
postsCollected[this.data.currentPostId] = postCollected;
//更新文章是否的缓存值
wx.setStorageSync('posts_Collected', postsCollected);
//更新数据绑定变量，从而实现切换图片
this.setData({
collected:postCollected
})
}