14.wx.showToast交互反馈
post-detail.js添加个消息提示框
onCollectionTap: function(ev) { var postsCollected = wx.getStorageSync(‘posts_Collected‘) var postCollected = postsCollected[this.data.currentPostId] postCollected = !postCollected; postsCollected[this.data.currentPostId] = postCollected; // 更新文章是否收藏的缓存值 wx.setStorageSync(‘posts_Collected‘, postsCollected) // 更新数据绑定变量,实现切换图片 this.setData({ collected: postCollected }) wx.showToast({ title: postCollected ? "收藏成功" : "取消成功", duration: 1000, icon: "success" }) }
效果
15.音乐播放功能
在posts-data.js里面给每篇文章添加一个music属性
music: { url: "http://music.163.com/song/media/outer/url?id=108242.mp3", title: "她说-林俊杰", coverImg: "http://y.gtimg.cn/music/photo_new/T002R150x150M000001TEc6V0kjpVC.jpg?max_age=2592000" }
post-detail.wxml
- 没播放音乐就显示文章图片,播放音乐就显示音乐歌手图片
- 绑定事件,添加播放和暂停音乐以及图片切换功能
<!-- <image class="head-image" src="{{postData.headImgSrc}}"></image> --> <image class=‘head-image‘ src="{{isPlayingMusic?postData.music.coverImg:postData.headImgSrc}}"></image> <image catchtap=‘onMusicTap‘ class=‘audio‘ src="{{isPlayingMusic? ‘/images/music/music-stop.png‘: ‘/images/music/music-start.png‘}}"></image>
post-detail.js
// 播放音乐 onMusicTap: function (ev) { var currentPostId = this.data.currentPostId; var postData = postsData.postlist[currentPostId]; var isPlayingMusic = this.data.isPlayingMusic; if (isPlayingMusic) { wx.pauseBackgroundAudio(); this.setData({ isPlayingMusic: false }) } else { wx.playBackgroundAudio({ dataUrl: postData.music.url, title: postData.music.title, coverImgUrl: postData.music.coverImg, }) this.setData({ isPlayingMusic: true }) } }
16.监听音乐播放事件
post-detail.js的onLoad函数里面添加监听事件
var that = this; wx.onBackgroundAudioPlay(function(){ that.setData({ isPlayingMusic: true }) }); wx.onBackgroundAudioPause(function () { that.setData({ isPlayingMusic: false }) }); },
绑定监听事件后,播放按钮的状态就可以同步切换了
17.完善音乐播放功能
在文章详情页,点击播放音乐后,然后返回到文章列表页,再进到详情页,发现播放按钮是暂停状态,这是因为应用程序存在生命周期,下面就解决这个问题。
app.js绑定一个全局的变量(音乐播放状态)
App({ globalData: { g_isPlayingMusic: false, g_currentMusicPostId: null, },})
post-detail.js
var app = getApp();Page({ data: { isPlayingMusic: false }, onLoad: function(options) { . . . if (app.globalData.g_isPlayingMusic && app.globalData.g_currentMusicPostId === postId) { this.setData({ isPlayingMusic: true }) } this.setMusicMonitor() }, setMusicMonitor:function(){ var that = this; wx.onBackgroundAudioPlay(function () { that.setData({ isPlayingMusic: true }) app.globalData.g_currentMusicPostId = that.data.currentPostId app.globalData.g_isPlayingMusic = true }); wx.onBackgroundAudioPause(function () { that.setData({ isPlayingMusic: false }) app.globalData.g_currentMusicPostId = null app.globalData.g_isPlayingMusic = false }); },
18.轮播图跳转到文章详情
post.wxml
<swiper catchtap=‘onSwiperTap‘ indicator-dots=‘true‘ autoplay=‘true‘ interval=‘2000‘>
post.js
onSwiperTap(event) { var postId = event.target.dataset.postid wx.navigateTo({ url: ‘post-detail/post-detail?id=‘ + postId }) },
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