同样的代码，iPhone 7没问题，模拟器也没问题。

takePhoto() {
  console.log('take photo click')
  this.ctx.takePhoto({
    quality: 'high',
    success: (res) => {
      console.log('success ' + res.tempImagePath)
      this.dispatchToViewer(res.tempImagePath)
    },
    fail: (e) => {
      console.log(e)
    }
  })
}