小程序编写收藏功能按钮时候，收藏后退出报错，求解答

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摘要：小程序编写收藏功能按钮时候，收藏后退出报错，求解答
展开：WAService.js:3thirdScriptErrorCannotreadproperty0ofundefined;atpages/posts/postdetail/postdetailpagelifeCycleMethodonLoadfunctionTypeError:Cannotreadproperty0ofundefined代码：//post_detail.jsvarpostsDatarequire(../../../data/posts_data.js)Page({onLoad:function(option){varpostIdoption.id;this.data.currentPostIdpostId;varpostDatapostsData.postList[postId];this.setData({postData:postData})varpostsCollectedwx.getStorageSync(posts_collected);if(postsCollected){varpostCollectedpostCollected[postId];this.setData({collected:postCollected})}else{varpostsCollected{};postsCollected[postId]false;wx.setStorageSync(posts_collected,postsCollected);}},onCollectionTap:function(event){varpostsCollectedwx.getStorageSync(posts_collected);varpostCollectedpostsCollected[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.wxmlviewclasscontainerimageclassheadimagesrc{{postData.headImgSrc}}/imageimageclassaudiosrc/image/music/musicstart.png/imageviewclassauthordateimageclassavatarsrc{{postData.avatar}}/imagetextclassauthor{{postData.author}}/texttextclassconsttext发表于/texttextclassdate{{postData.dateTime}}/text/viewtextclasstitle{{postData.title}}/textviewclasstoolviewclasscircleimgimagewx:if{{collected}}catchtaponCollectionTapsrc/image/icon/collection.png/imageimagewx:elsecatchtaponCollectionTapsrc/image/icon/collectionanti.png/imageimageclassshareimgsrc/image/icon/share.png/image/viewviewclasshorizon/view/viewtextclassdetail{{postData.detail}}/text/view