[英]Subclassing UIImagePickerController for adding functionality
所以基本上我要做的是,将“拍摄图像”的按钮更改为我的自定义按钮。 当用户更改DeviceOrientation时,按钮将根据方向改变。 我已经尝试过使用“overLay”属性,但是一旦放置它就似乎无法改变或移动“overLay”。 所以我决定继承UIImagePickerController的子类,但是当我把它叫出来时,相机根本就不会显示!
任何帮助理解什么是问题将有所帮助...谢谢!!
这是viewController调用子类“UIImagePickerController”:
@interface CameraViewController : UIViewController<UIImagePickerControllerDelegate>
@interface CameraViewController ()
@property (nonatomic) pickerControllerMC *cameraPickerView;
self.cameraPickerView = [[pickerControllerMC alloc]initWithNibName:@"pickerControllerMC" bundle:nil];
self.cameraPickerView.delegate = self;
// Do any additional setup after loading the view.
//create a new image picker instance
//set source to video!
self.cameraPickerView.sourceType = UIImagePickerControllerSourceTypeCamera;
//hide all controls
self.cameraPickerView.showsCameraControls = NO;
self.cameraPickerView.navigationBarHidden = YES;
self.cameraPickerView.toolbarHidden = YES;
// self.delegate = self;
//make the video preview full size
self.cameraPickerView.wantsFullScreenLayout = YES;
self.cameraPickerView.cameraViewTransform =
CGAffineTransformScale(self.cameraPickerView.cameraViewTransform,
CAMERA_TRANSFORM_X,
CAMERA_TRANSFORM_Y);
//Getting WidthAnd hight
CGRect screen = [[UIScreen mainScreen] bounds];
//CGFloat widthInPixel = screen.size.width * scaleFactor;
//CGFloat heightInPixel = screen.size.height * scaleFactor;
int Width = screen.size.width;
int hight = screen.size.height;
[self presentViewController:self.cameraPickerView animated:YES completion:nil];
这是子类:
@interface pickerControllerMC : UIImagePickerController
@implementation pickerControllerMC
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
UIButton *buttonTakeImage = [UIButton
buttonWithType:UIButtonTypeRoundedRect];
[buttonTakeImage setBackgroundImage:[UIImage imageNamed:@"CameraButton@2x"] forState:UIControlStateNormal];
[buttonTakeImage addTarget:self action:@selector(takePictureClicked) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:self.overlay];
[self.view addSubview:buttonTakeImage];
//Adding orientation Notifications!
[[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications];
[[NSNotificationCenter defaultCenter] addObserver: self selector: @selector(deviceOrientationDidChange:) name: UIDeviceOrientationDidChangeNotification object: nil];
}
编辑
好吧我的错误是,我使用“initWithNibName”,所以我每次都有一个白色的Nib屏幕..一切都很好。
对不起,你不能UIImagePickerController
子类。 来自文档:
重要说明:UIImagePickerController类仅支持纵向模式。 此类旨在按原样使用,不支持子类化。 此类的视图层次结构是私有的,不得修改,但有一个例外。 您可以将自定义视图分配给cameraOverlayView属性,并使用该视图显示其他信息或管理相机界面与代码之间的交互。
但是,您可以完全控制拍摄UI的图片。
您可以为UIImagePickerController
提供cameraOverlayView
。
完全避免UIImagePickerController
使用AVFoundation
类来实现图片拍摄和您自己的UIViewController
子类作为控制器和视图管理UI和行为。 请参阅https://developer.apple.com/library/mac/documentation/AudioVideo/Conceptual/AVFoundationPG/Articles/04_MediaCapture.html 。
可以对UIImagePickerController
进行子类化以添加要传递给UIImagePickerControllerDelegate
方法的属性。 我做到了没有任何问题。 但是人们无法使用它的方法或观点。
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