ios - 切换到视频捕获模式后如何修复 UIImagePickerController 崩溃？

Question

切换到视频捕获模式后，iPhone XR（iOS 12.4.1）真实设备上的 UIImagePickerController 发生崩溃。在 UIImagePickerController 的第二次演示中重现崩溃。崩溃不会在 iPhone 6(iOS 12.4.1) 真实设备上重现。使用 Xcode 10.3 构建的 Info.plist 测试应用程序中设置了相机和麦克风使用说明键

脚步：

1. 呈现 UIImagePickerController
2. 关闭 UIImagePickerController
3. 呈现 UIImagePickerController
4. 点击视频按钮 - > 崩溃

如果我设置，崩溃不会重现videoQuality = UIImagePickerControllerQualityTypeHigh。但我需要UIImagePickerControllerQualityTypeMedium。

@interface ViewController () < UINavigationControllerDelegate, UIImagePickerControllerDelegate>
@end

@implementation ViewController

#pragma mark - IBActions

- (IBAction)showPicker:(UIButton *)sender {
    UIImagePickerController *pickerController = [UIImagePickerController new];
    pickerController.sourceType = UIImagePickerControllerSourceTypeCamera;
    pickerController.mediaTypes = [UIImagePickerController availableMediaTypesForSourceType:UIImagePickerControllerSourceTypeCamera];
//    pickerController.videoQuality = UIImagePickerControllerQualityTypeHigh;
    pickerController.delegate = self;

    [self presentViewController:pickerController animated:YES completion:NULL];
}

#pragma mark - UIImagePickerControllerDelegate

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<UIImagePickerControllerInfoKey, id> *)info {
    [self dismissViewControllerAnimated:YES completion:NULL];
}

- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker {
    [self dismissViewControllerAnimated:YES completion:NULL];
}

@end

'NSInvalidArgumentException', reason: '*** -[AVCaptureDevice setActiveColorSpace:] Not supported - use activeFormat.supportedColorSpaces'

Answer 1

我做了一个替代不受支持的颜色空间的解决方法。

private extension AVCaptureDevice {
    
    static let configureRandomCrashWorkaround: Void = {
        swizzleInstanceMethod(
            class: AVCaptureDevice.self,
            originalSelector: #selector(setter: AVCaptureDevice.activeColorSpace),
            swizzledSelector: #selector(AVCaptureDevice.kjy_swizzle_setActiveColorSpace)
        )
    }()
    
    @objc func kjy_swizzle_setActiveColorSpace(_ colorSpace: AVCaptureColorSpace) {
        var colorSpace = colorSpace
        let supportedColorSpaces = activeFormat.supportedColorSpaces
        
        if !supportedColorSpaces.isEmpty,
           !supportedColorSpaces.contains(colorSpace)
        {
            // prevent a crash on UIImagePickerControllerInfoKey/Camera: "Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: -[AVCaptureDevice setActiveColorSpace:] Not supported - use activeFormat.supportedColorSpaces"
            colorSpace = activeFormat.supportedColorSpaces[0]
        }
        kjy_swizzle_setActiveColorSpace(colorSpace)
    }
}