点击收藏报错

来源：19-7 使用缓存实现文章收藏功能

EugenioCode

2017-07-18

Page({
    data: {

    },
    onLoad: function (option) {
        wx.clearStorage();
        var postId = option.id;
        this.data.currentPostId = postId;
        var postData = postsData.postList[postId];
        this.setData({
            postData: postData
        });

        // var postCollected = {
        //     1:"true",
        //     2:"false",
        //     3:"true"
        // }
        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);
        }
    },
    onCollectionTap: function (event) {
        var postsCollected = wx.getStorageSync("post_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;
        //更新文章是否收藏的缓存值
        wx.setStorageSync("post_collected", postsCollected);
        //更新数据绑定变量，从而切换图片
        this.setData({
            collected: postCollected
        })
    }

})

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