objective-c - 以编程方式显示相机快门？

Question

为了制作我的自定义 UIImagePickerSourceTypeCamera，我必须这样做:

pickerOne = [[UIImagePickerController alloc] init];
pickerOne.delegate = self;
pickerOne.sourceType = UIImagePickerControllerSourceTypeCamera;
pickerOne.showsCameraControls = NO;
pickerOne.navigationBarHidden = YES;
pickerOne.toolbarHidden = YES;
pickerOne.wantsFullScreenLayout = YES;

但是现在，当我拍下这样的照片时:

[cameraButton addTarget:pickerOne 
                 action:@selector(takePicture)
       forControlEvents:UIControlEventTouchUpInside];

拍照时不显示快门。有没有办法以编程方式显示它？

Answer 1

这是可能的。诀窍是执行以下操作:

在初始化选择器时启用相机控件(这将启用快门 View )。

pickerOne.showsCameraControls = YES;

用您自己的 View 覆盖相机控件，该 View 具有 cameraButton

在您的takePicture: 方法中执行以下操作:

pickerOne.showsCameraControls = NO;
[[NSRunLoop currentRunLoop] runUntilDate:[NSDate dateWithTimeIntervalSinceNow:0.0]];
[pickerOne takePicture];

在 imagePickerController:didFinishPickingMediaWithInfo: 方法中执行以下操作:

pickerOne.showsCameraControls = YES;  // perform on main thread