Question

我一直在搜索其他StackOverflow问题，试图为此找到解决方案，但无济于事。我有以下代码，它试图将2个按钮添加到cameraOverlayView：

- (BOOL) startCameraControllerFromViewController: (UIViewController*) controller
                               usingDelegate: (id <UIImagePickerControllerDelegate,
                                               UINavigationControllerDelegate>) delegate {

    if (([UIImagePickerController isSourceTypeAvailable: UIImagePickerControllerSourceTypeCamera] == NO) || (delegate == nil) || (controller == nil))
        return NO;


    UIImagePickerController *picker = [[UIImagePickerController alloc] init];

    picker.delegate = self;
    picker.allowsEditing = YES;


    picker.sourceType = UIImagePickerControllerSourceTypeCamera;

    [_cancelPicture addTarget:self action:@selector(cancelPicture:) forControlEvents:UIControlEventTouchUpInside];
    [_takePic addTarget:self action:@selector(takePic:) forControlEvents:UIControlEventTouchUpInside];

    [picker.cameraOverlayView addSubview: _cancelPicture];
    [picker.cameraOverlayView addSubview: _takePic];
    [self.view bringSubviewToFront:_cancelPicture];
    [self.view bringSubviewToFront:_takePic];

    _imageView.userInteractionEnabled = YES;

    picker.showsCameraControls = NO;

    [self presentViewController:picker animated:YES completion:NULL];

    return YES;
}

imageView是我的UIImageView。 cancelPicture应该将用户返回到以前的视图控制器，takePic应该保存照片然后再显示它（再次，在另一个视图控制器上）。当我部署代码时，按钮显示，但点击它们什么都不做。我知道我的委托方法是正确实现的，因此我不认为需要在这里复制它们。我也有以下IBActions，但我不确定它们是否有任何好处：

- (IBAction)cancelPicture:(UIButton *)sender {
    [self imagePickerControllerDidCancel:_imagePickerController];
}

- (IBAction)takePic:(UIButton *)sender {
    [_imagePickerController takePicture];
}

这些操作会连接到我的情节提要中的相应视图控制器。

编辑：委派方法：

// For responding to the user tapping Cancel.
- (void) imagePickerControllerDidCancel: (UIImagePickerController *) picker {

    [[picker parentViewController] dismissViewControllerAnimated: YES completion: nil];

}

// For responding to the user accepting a newly-captured picture
- (void) imagePickerController: (UIImagePickerController *) picker didFinishPickingMediaWithInfo: (NSDictionary *) info {

    NSString *mediaType = [info objectForKey: UIImagePickerControllerMediaType];
    UIImage *originalImage, *editedImage, *imageToSave;

    // Handle a still image capture
    if (CFStringCompare ((CFStringRef) mediaType, kUTTypeImage, 0)
    == kCFCompareEqualTo) {

        editedImage = (UIImage *) [info objectForKey:
                               UIImagePickerControllerEditedImage];
        originalImage = (UIImage *) [info objectForKey:
                                 UIImagePickerControllerOriginalImage];

        if (editedImage) {
            imageToSave = editedImage;
        } else {
            imageToSave = originalImage;
        }

        // Save the new image (original or edited) to the Camera Roll
        UIImageWriteToSavedPhotosAlbum (imageToSave, nil, nil , nil);
    }
    _imageView.image = imageToSave;

    [[picker parentViewController] dismissViewControllerAnimated: YES completion:nil];
}

cameraOverlayView子视图中没有响应的UIButtons

0 个答案: