UIImagePickerController - 默认情况下如何访问前置摄像头？ [英] UIImagePickerController - How do I access the front facing camera by default?

问题描述

我使用ViewController中的以下代码调出相机：

I am bringing up the camera with the following code from my ViewController:

- (void)viewDidLoad {
    self.imgPicker = [[UIImagePickerController alloc] init];
    self.imgPicker.sourceType = UIImagePickerControllerCameraDeviceFront;
    self.imgPicker.delegate = self;     
}

- (IBAction)grabCamera {
    [self presentModalViewController:self.imgPicker animated:YES];
}

我怎样才能使摄像机默认使用前置摄像头iPhone4而不是后置摄像头？我试过DeviceFront无济于事。

How can I make it so the camera by default uses the front camera of the iPhone4 and not the back camera? I tried DeviceFront to no avail.

另外，在按下grabCamera之后，如何在此相机的顶部添加子视图（半尺寸）？
如果我在我的MainWindow.xib中有这个子视图我在说完presentModalViewController代码后尝试说addSubview但它没有用...我需要创建一个NSTimer并在摄像头显示完全后加载addSubview我需要使用别的东西（类似于CSS中的z-index）第二个问题的答案是imgPicker.cameraOverlayView = viewName;

Also, How can I add a subview (half sized) ontop of this camera after grabCamera is pressed? If I have this subview in my MainWindow.xib I tried just saying addSubview after saying the presentModalViewController code but it didn't work... Do I need to create an NSTimer and load the addSubview after the camera display is fully presented or do I need to use something else (similar to z-index in CSS) The answer to the second question is imgPicker.cameraOverlayView = viewName;

谢谢大家！

推荐答案

UIImagePickerControllerCameraDeviceFront 不是<的有效枚举code> sourceType 属性。 sourceType 属性定义您是使用相机还是照片库。您需要设置 cameraDevice 属性。

UIImagePickerControllerCameraDeviceFront is not a valid enum for the sourceType property. The sourceType property defines whether you're using the camera or the photo library. You need to set the cameraDevice property instead.

self.imgPicker.sourceType = UIImagePickerControllerSourceTypeCamera;
self.imgPicker.cameraDevice = UIImagePickerControllerCameraDeviceFront;

Swift 2

Swift 2

imgPicker.sourceType = .Camera
imgPicker.cameraDevice = .Front

Swift 3

Swift 3

imgPicker.sourceType = .camera
imgPicker.cameraDevice = .front

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