编写收藏功能按钮时候,收藏后退出报错,求解答
WAService.js:3 thirdScriptError Cannot read property '0' of undefined;at "pages/posts/post-detail/post-detail" page lifeCycleMethod onLoad function TypeError: Cannot read property '0' of undefined 代码: //post_detail.js var postsData = require("../../../data/posts_data.js") Page({ onLoad:function(option){ var postId=option.id; this.data.currentPostId = postId; var postData=postsData.postList[postId]; this.setData({ postData: postData }) var postsCollected = wx.getStorageSync('posts_collected'); if (postsCollected) { var postCollected = postCollected[postId]; this.setData({ collected: postCollected }) } else{ var postsCollected = {}; postsCollected[postId] = false; wx.setStorageSync('posts_collected', postsCollected); } }, onCollectionTap:function(event){ var postsCollected = wx.getStorageSync('posts_collected'); var postCollected = postsCollected[this.data.currentPostId]; postCollected = !postCollected; postsCollected[this.data.currentPostId] = postCollected; wx.setStorageSync('posts_collected', postsCollected); this.setData({ collected: postCollected }), wx.showToast({ title:postCollected?"收藏成功":"取消成功" }) } }) post_detail.wxml <view class="container"> <image class="head-image" src="{{postData.headImgSrc}}"></image> <image class="audio" src="/image/music/music-start.png"></image> <view class="author-date"> <image class="avatar" src="{{postData.avatar}}"></image> <text class="author">{{postData.author}}</text> <text class="const-text">发表于</text> <text class="date">{{postData.dateTime}}</text> </view> <text class="title">{{postData.title}}</text> <view class="tool"> <view class="circle-img"> <image wx:if="{{collected}}" catchtap="onCollectionTap" src="/image/icon/collection.png"></image> <image wx:else catchtap="onCollectionTap" src="/image/icon/collection-anti.png"></image> <image class="share-img" src="/image/icon/share.png"></image> </view> <view class="horizon"></view> </view> <text class="detail">{{postData.detail}}</text> </view>