「小程式JAVA實戰」小程式視訊播放的時候生命週期的控制(55)
當播放單個視訊時,點選搜尋,視訊還在後臺繼續播放,這是有問題,需要通過生命週期的方式來控制,當跳轉頁面時,視訊暫停播放,視訊返回後繼續播放。原始碼https://github.com/limingios/wxProgram.git 中No.15
官網js的方式控制視訊
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VideoContext
>https://developers.weixin.qq.com/miniprogram/dev/api/media/video/VideoContext.html
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程式碼實現
>給video增加id,然後onload獲取VideoContext,onshow進行play,onHide進行pause。
videoInfo.wxml
<view style='width:100%;height:100%'> <video id="myVideo" src="https://127.0.0.1:8081/180831CF2TS25MNC/4e0ca373-6520-45b9-a1a6-7ee8429dc5d8.mp4" muted='{{false}}' controls='{{false}}' autoplay='{{true}}' loop='{{true}}' enable-progress-gesture='{{false}}' style='width:100%;height:100%;' objectFit='{{cover}}' > <cover-view class='container'> <!-- 上傳視訊 --> <cover-image src='../../resource/images/camera.png' style='width:50rpx;height:50rpx;' bindtap='upload'></cover-image> <!-- 搜尋按鈕 --> <cover-image src='../../resource/images/search.png' style='width:45rpx;height:45rpx;' bindtap='showSearch'></cover-image> </cover-view> <cover-view class='container-me'> <!-- 頭像 --> <cover-image class="face" src='{{serverUrl}}{{publisher.faceImage}}' bindtap='showPublisher'></cover-image> <!-- 喜歡收藏按鈕 --> <block wx:if="{{userLikeVideo}}"> <cover-image class="size-me" src='../../resource/images/like.png' style='margin-top:30rpx;' bindtap='likeVideoOrNot'></cover-image> </block> <block wx:else> <cover-image class="size-me" src='../../resource/images/unlike.png' style='margin-top:30rpx;' bindtap='likeVideoOrNot'></cover-image> </block> <!-- 評論按鈕 --> <cover-image class="size-me" src='../../resource/images/comments.png' style='margin-top:30rpx;' bindtap='leaveComment'></cover-image> <!-- 分享按鈕 --> <cover-image class="size-me" src='../../resource/images/share.png' style='margin-top:30rpx;' bindtap='shareMe'></cover-image> </cover-view> <cover-view class='container-words'> <cover-view>@{{publisher.nickname}}</cover-view> <cover-view class='video-desc'>{{videoInfo.videoDesc}}</cover-view> </cover-view> <cover-view class='container-bottom'> <!-- 首頁按鈕 --> <cover-image class='' src='../../resource/images/index.png' class="size-bottom" bindtap='showIndex'></cover-image> <!-- 我的按鈕 --> <cover-image class='' src='../../resource/images/mine.png' class="size-bottom" bindtap='showMine'></cover-image> </cover-view> </video> </view>
videoInfo.js
Page({ data: { cover:'cover', videoContext:"" }, showSearch:function(){ wx.navigateTo({ url: '../videoSearch/videoSearch', }) }, onLoad:function(){ var me = this; me.videoContext = wx.createVideoContext('myVideo', me); }, onShow:function(){ var me = this; me.videoContext.play(); }, onHide:function(){ var me = this; me.videoContext.pause(); } })
PS:小程式開發很類似app開發,瞭解生命週期,可以很方便的完成一些功能的開發。
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