iOS 7.1 imagePicker CameraFlashMode未指示Flash状态 [英] iOS 7.1 imagePicker CameraFlashMode not indicating Flash state

问题描述

我有iPhone应用程序，它使用自定义视图覆盖相机。
我有一个按钮在相机闪光模式之间切换，这是代码

I have iPhone application which overlays the camera with custom view. I have a button to switch between camera flash mode, this is the code

switch ([self.imagePickerController cameraFlashMode]) {
    case UIImagePickerControllerCameraFlashModeAuto:
        [self.imagePickerController setCameraFlashMode:UIImagePickerControllerCameraFlashModeOn];
        return @"On";
        break;

    case UIImagePickerControllerCameraFlashModeOn:
        [self.imagePickerController setCameraFlashMode:UIImagePickerControllerCameraFlashModeOff];
        return @"Off";
        break;

    case UIImagePickerControllerCameraFlashModeOff:
        [self.imagePickerController setCameraFlashMode:UIImagePickerControllerCameraFlashModeAuto];
        return @"Auto";
        break;

    default:
        break;
}

这是我的问题：在iOS 7.0x上工作得非常好，但在iOS中7.1 cameraFlashMode属性返回UIImagePickerControllerCameraFlashModeAuto，无论其真实状态如何。

This is my problem: Worked perfectly fine on iOS 7.0x, but in iOS 7.1 the cameraFlashMode property returns UIImagePickerControllerCameraFlashModeAuto regardless of its real state.

闪存模式确实发生了变化，但我没有得到任何指示。
任何线索？
谢谢

The flash mode does change, but i get no indication of that. Any clues? Thanks

推荐答案

我解决了这个问题：

@property (nonatomic) NSInteger flashMode;

if (_flashMode == UIImagePickerControllerCameraFlashModeAuto)
{
    _flashMode = UIImagePickerControllerCameraFlashModeOff;
}
else if (_flashMode == UIImagePickerControllerCameraFlashModeOff)
{
    _flashMode = UIImagePickerControllerCameraFlashModeOn;
}
else if (_flashMode == UIImagePickerControllerCameraFlashModeOn)
{
    _flashMode = UIImagePickerControllerCameraFlashModeAuto;
}

_cameraPicker.cameraFlashMode = (UIImagePickerControllerCameraFlashMode)_flashMode;

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