Question

iOS 9闪存开启/关闭/自动正常工作。但是在iOS 10中闪存不起作用。

    self.camObj = [[UIImagePickerController alloc] init];

    [self addCameraToTheScreen];
    NSArray *mediaTypes = [NSArray arrayWithObject:(NSString*)kUTTypeMovie];
    self.camObj.mediaTypes = mediaTypes ;
    self.camObj.modalTransitionStyle = UIModalPresentationFullScreen;
    self.camObj.sourceType = UIImagePickerControllerSourceTypeCamera;
    self.camObj.videoMaximumDuration = 10.0f;
    self.camObj.showsCameraControls = NO;
    self.camOptionsView.frame = [UIScreen mainScreen].bounds;
    self.camObj.delegate = (id<UIImagePickerControllerDelegate,UINavigationControllerDelegate>)self;
    [self.camObj setCameraOverlayView:self.camOptionsView];

并以编程方式更改闪光模式。

 [self.camObj setCameraFlashMode:UIImagePickerControllerCameraFlashModeOn];

Answer 1

这是iOS 10的一个错误（至少10.0.2）。请注意，如果cameraFlashMode处于启用状态，则设置showsCameraControls 会有效。

Answer 2

在iOS 10.2 上解决了问题。现在手动相机闪光模式处理再次正常工作，无需启用和禁用showsCameraControls。

Answer 3

这是一个iOS 10的bug，所以你需要从UIImagePickerController继承并覆盖cameraFlashMode setter：

 - (void)setCameraFlashMode:(UIImagePickerControllerCameraFlashMode)cameraFlashMode {
     if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 10 && !self.showsCameraControls) {
         self.showsCameraControls = YES;
         super.cameraFlashMode = cameraFlashMode;
         self.showsCameraControls = NO;
     } else {
         super.cameraFlashMode = cameraFlashMode;
     }
 }

Answer 4

有报告称第三方更换部件可能会导致这些症状，尤其是有关phone needing to cool down and the camera / flash not working的消息。如果检测到非Apple硬件，手机上的固件也可能会检查内置部件是否为正品，这也可能导致这些问题。

Answer 5

对于iOS 10，请先尝试渲染UIImagePickerController并再次设置相机闪光灯。尝试

[self presentViewController:self.camObj animated:YES completion:^{
    //For iOS 10 and higher versions so it can set the proper flashmode
    if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 10) {
       [self.camObj setCameraFlashMode:UIImagePickerControllerCameraFlashModeOn];
    }
}];

希望这可以提供帮助。

iOS 10相机闪光灯开/关不起作用

5 个答案: