onLoad: function(options) {

    if (wx.createRewardedVideoAd) {

    rewardedVideoAd = wx.createRewardedVideoAd({ adUnitId: 'adunit-5216875549a7fe22'})

    rewardedVideoAd.onLoad(() => {

    console.log('onLoad event emit')

    })

    rewardedVideoAd.onError((err) => {

    console.log('onError event emit', err)

    })

    rewardedVideoAd.onClose((res) => {

    console.log('onClose event emit', res)

    })

    } }

iphone6下视频对象为wx.createRewardedVideoAd方法为空