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我有两种看法。非常简单的设置只是为了玩相机胶卷。

一个视图将使用以下方法调出相机胶卷：

[self presentViewController:self.imagePicker animated:NO completion:nil];

这是由 a 触发的UIButton。它带来了相机，一切都很好。

拍照后，我正在调用以下命令来关闭控制器：

[self dismissViewControllerAnimated:NO completion:nil];

同样，一切正常。

但是在模态视图关闭后，调出imagePicker控制器的视图不再接收触摸（UIButton将不再再次调出相机）。

只有当我切换到另一个视图并返回时，它才会再次开始接收触摸。

我一直在寻找解决这个问题的方法，但没有成功找到任何东西。提前致谢。

编辑（添加代码）：

在 CameraController.m 中

这是调出相机胶卷的地方

（UIViewController符合的 子类<UIImagePickerControllerDelegate, UINavigationControllerDelegate>）

//UIButton that brings up the imagePicker
- (IBAction)useCamera
{
        [self prepareImagePicker];
        [self presentViewController:self.imagePicker animated:NO completion:nil];
}

//Initializing ImagePicker
- (void)prepareImagePicker
{
    if ([UIImagePickerController isSourceTypeAvailable:
         UIImagePickerControllerSourceTypeCamera])
    {
        self.imagePicker = [[UIImagePickerController alloc] init];
        self.imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera;
        self.imagePicker.mediaTypes = [NSArray arrayWithObjects:(NSString *) kUTTypeImage, nil];
        self.imagePicker.delegate = self;

    OverlayCameraView *cameraOverlay = [[OverlayCameraView alloc] initWithFrame:(CGRect){{0, 0}, 320, 480} andTheCameraController:self];
        self.imagePicker.cameraOverlayView = cameraOverlay;
   }
}

//Delegate Method when a picture is taken
-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
    self.imagePicker.delegate = nil;
    [picker dismissViewControllerAnimated:NO completion:nil];
    self.imagePicker = nil;
    self.imageView.image = [info objectForKey:UIImagePickerControllerOriginalImage];  
}

在 OverlayCameraView.m 中

//Camera Overlay Class (Subclass of UIView)

- (id)initWithFrame:(CGRect)frame andTheCameraController:(CameraController*)cameraController
{
    if ((self = [super initWithFrame:frame]))
    {
        self.camera = cameraController;
    //.…2 UIButtons set up

    }
    return self;
}

//Overlay Cancel Button
- (void) cancel
{  
   [self.camera dismissViewControllerAnimated:NO completion:nil];
}

//Overlay Take Picture Button
- (void) takeAPicture
{
    [self.camera.imagePicker takePicture];
}
4

1 回答 1

1

You should be calling dismissViewControllerAnimated on the picker not self via the UIImagePickerControllerDelegate methods.

[picker dismissViewControllerAnimated:NO completion:nil];

or if you are keeping a reference to it:

[self.imagePicker dismissViewControllerAnimated:NO completion:nil];

EDIT:

Based on the revised code, I believe

self.imagePicker.cameraOverlayView = cameraOverlay;

should be:

self.imagePicker.cameraOverlayView = cameraOverlay.view;

Also this will cause a +2 reference count and will leak if you are not using ARC:

self.imagePicker = [[UIImagePickerController alloc] init];

It should be for proper reference counting:

UIImagePickerController *picker = [[UIImagePickerController alloc] init];
self.imagePicker = picker;
[picker release];
于 2013-10-16T20:53:44.577 回答