onLaunch: function() {
 // 获取激励视频广告位加载的次数
 var count = wx.getStorageSync('showRewardedVideoAdCount');
 if (!count) {
 wx.setStorage({
 key: 'showRewardedVideoAdCount',
 data: 0,
 })
 };
 // 上次观看激励视频广告保存的时间
 var lastSaveTime = wx.getStorageSync('saveVideoAdCountTime');
 if (lastSaveTime) {
 // 计算最后一次保存时间晚上12点的时间戳
 var endTime = new Date(new Date(lastSaveTime).setHours(23, 59, 59, 999));
 // 当前时间戳
 var currentDate = new Date();
 var currentTime = currentDate.getTime();
 // 清空激励广告位观看次数
 if (currentTime > endTime) {
 wx.setStorage({
 key: 'showRewardedVideoAdCount',
 data: 0,
 })
 }
 } 
},

// 如果激励广告位视频存在
if (rewardedAdId) {
 that.setData({
 rewardedAdId: rewardedAdId
 }, function() {
 // 创建一个激励视频广告位，rewardedVideoAd为全局变量，与Page()同级.
 rewardedVideoAd = wx.createRewardedVideoAd({
 adUnitId: rewardedAdId
 });
 // 监听加载
 rewardedVideoAd.onLoad(() => {
 console.log('激励广告加载成功');
 });
 // 监听失败
 rewardedVideoAd.onError(err => {
 console.log('激励广告加载失败' + err);
 });
 })
}

// 点击播放
bindPlay: function() {
 var that = this;
 var count = wx.getStorageSync('showRewardedVideoAdCount');
 //　对应页面上的video标签
 var videoContext = wx.createVideoContext('myVideo');
 // 限制激励视频最大播放次数
 if (count < App.globalData.maxShowRewardedAdCount) {
 // 如果存在激励视频广告ID,并且当前页面已经播放过一次广告
 if (that.data.rewardedAdId && that.data.showRewardedAd == 1) {
 // 暂停视频
 videoContext.stop();
 // 加载广告位
 rewardedVideoAd.load().then(function() {
 rewardedVideoAd.show();
 }).catch(function(err) {
 console.log('激励广告位加载失败');
 });
 // 广告位关闭后
 rewardedVideoAd.onClose(function(res) {
 that.setData({
  showRewardedAd: 0
 });
 videoContext.play();
 // 保存累加的次数
 var newCount = parseInt(count) + 1;
 wx.setStorage({
  key: 'showRewardedVideoAdCount',
  data: newCount,
 });
 var time = new Date()
 time = time.getTime();
 // 更新保存的时间
 wx.setStorage({
  key: 'saveVideoAdCountTime',
  data: time
 });
 })
 } else {
 // 继续播放
 videoContext.play();
 }
 } else {
 // 继续播放
 videoContext.play();
 }
},