在 iOS 13 中使用 UIImagePickerController 时崩溃答案

【问题标题】：Crash when use UIImagePickerController in iOS 13在 iOS 13 中使用 UIImagePickerController 时崩溃
【发布时间】：2019-10-21 07:20:27
【问题描述】：

它在另一个演示中运行良好，但在我的项目中崩溃。我用谷歌搜索“CAMPreviewViewController”，但什么也没找到

UIImagePickerController * picker=[[UIImagePickerController alloc]init];
picker.sourceType = UIImagePickerControllerSourceTypeCamera;
picker.allowsEditing = NO;
picker.delegate = self;
picker.cameraDevice = UIImagePickerControllerCameraDeviceFront;
[self presentViewController:picker animated:YES completion:nil];

崩溃

断言失败 -[CAMPreviewViewController _updateIndicatorsForMetadataObjectResults:viewType:viewClass:frameCallback:minimumAreaChangeThreshold:minimumAreaFractionChangeThreshold:], /BuildRoot/Library/Caches/com.apple.xbs/Sources/Camera/Camera-3602.9.230/CameraUI/Source/ CAMPreviewViewController.m:1152

【问题讨论】：

似乎是第三方库导致了这个问题
也许，它在 iOS 12 及更低版本中运行良好。
你找到解决办法了吗？

标签： ios crash uiimagepickercontroller

【解决方案1】：

试试这个

    var imagePicker: UIImagePickerController!

 @IBAction func takePhotoAction(_ sender: UIButton) {
        imagePicker =  UIImagePickerController()
        imagePicker.delegate = self
        imagePicker.sourceType = .camera
        present(imagePicker, animated: true, completion: nil)
    }

Add This to class as delegates 

 UINavigationControllerDelegate, UIImagePickerControllerDelegate

【讨论】：