Question

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！

任何有助于理解问题的帮助都会有所帮助......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];


    }

修改

好吧我的错误是，我使用了“initWithNibName”，所以我每次都有一个白色的Nib屏幕..一切都很好。

Answer 1

抱歉，您无法继承UIImagePickerController。来自文档：

重要说明：UIImagePickerController类支持纵向模式只要。此类旨在按原样使用，不支持子类。此类的视图层次结构是私有的，不得使用被修改，但有一个例外。您可以为自定义视图分配 cameraOverlayView属性并使用该视图来显示其他内容信息或管理相机界面之间的交互和你的代码。

但是，您可以完全控制拍摄UI的图片。

您可以向cameraOverlayView提供UIImagePickerController。
完全避免UIImagePickerController使用AVFoundation类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。

Answer 2

可以对var x = document.getElementById("username").value;进行子类化，以添加属性以传递给UIImagePickerController方法。我做到了没有任何问题。但是人们无法使用它的方法或视图。

子类化UIImagePickerController以添加功能

2 个答案: