1回答

啊可

提问者

2018-11-10

已解决，问题1:

新增这个键无值时的else判断。。 

//获取缓存中的值

   var postsCollected = wx.getStorageSync('posts_collected')

   if (postsCollected) {

     var postCollected = postsCollected[postId];

     if (postCollected) {

       this.setData({

         collected: postCollected

       })

     }else{

       postsCollected[postId] = false;

       wx.setStorageSync('posts_collected', postsCollected);

     }

   } else {

     var postsCollected = {};

     postsCollected[postId] = false;

     wx.setStorageSync('posts_collected', postsCollected);

   }

解决问题2，大意。。给当前键赋值时使用了postsCollected而不是postCollected

onColletionTap: function(event) {

   var postsCollected = wx.getStorageSync('posts_collected')

   var postCollected = postsCollected[this.data.currentPostid];

   console.log(this.data.currentPostid)

   //收藏变成未收藏，未收藏变成收藏

   postCollected = !postCollected;

   console.log(postCollected)

   //给当前的键赋值

   postsCollected[this.data.currentPostid] = postCollected;

   console.log(postsCollected)

   //更新了文章是否收藏的缓存值

   wx.setStorageSync('posts_collected', postsCollected)

   //更新数据绑定变量，从而切换图片

   this.setData({

     collected: postCollected

   })

 }

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