[图片] 这个拉取量2500，为啥曝光量就400呢，是什么原因导致两者差距那么大的呢？

刚进入页面的时候利用 wx.getSetting({             success(res) {                 console.log(res)                 if (!res.authSetting['scope.camera']) {                     console.log('没有授权')                     wx.authorize({                         scope: 'scope.camera',                         success() {                             wx.hideLoading()                             ctx = wx.createCameraContext()                             _this.cameraSuccess()                         },                         fail: function(res) {                             console.log(res)                             wx.hideLoading()                             _this.setData({                                 getCamera: true                             })                         }                     })                 } else {                     //用户已经授权相机                     wx.hideLoading()                     console.log('授权了')                     ctx = wx.createCameraContext()                         _this.cameraSuccess()                 }             }         }) 判断有没有相机授权，点击拒绝之后，利用 wx.openSetting({             success: function(res) {                 console.log(res)                 if (res.authSetting['scope.camera']) {                     _this.setData({                         getCamera: false,                     })                     wx.showModal({                         title: '提示',                         content: '您已授权成功',                         showCancel: false,                         confirmText: '确定',                         success: function(res) {                             if (res.confirm) {                                 // console.log('用户点击了“返回授权”')                                 _this.cameraSuccess()                             }                         }                     })                     setTimeout(function() {                         // _this.cameraSuccess()                     }, 1000)                 } else {                     wx.showModal({                         title: '警告',                         content: '您没有授权成功',                         showCancel: false,                         confirmText: '确定',                         success: function(res) {                             if (res.confirm) {                                 // console.log('用户点击了“返回授权”')                             }                         }                     })                 }             },             fail: function(res) {                 console.log(res)             }         }) 引导用户开启相机权限，但是开启返回之后，就不会调用ctx.takePhoto()，方法都没有走，因为我的手机是redmi k20 pro，调用摄像头的时候会弹出来，这里都没有弹出来，怎么解决，是我代码写的问题吗？