3

我试图给相机视图一个圆形来拍摄图像。圆应该是 200 宽和 200 高，当它打开时，用户必须能够与背景视图交互。到目前为止，我所做的只是：

- (IBAction)useCameraPhoto:(id)sender
{

if ([UIImagePickerController isSourceTypeAvailable:
     UIImagePickerControllerSourceTypeCamera])
{
    UIImagePickerController *imagePicker =
    [[UIImagePickerController alloc] init];
    imagePicker.delegate = self;
    imagePicker.sourceType =
    UIImagePickerControllerSourceTypeCamera;
    imagePicker.mediaTypes = [NSArray arrayWithObjects:
                              (NSString *) kUTTypeImage,
                              nil];
    imagePicker.allowsEditing = YES;
    [self presentViewController:imagePicker
                            animated:YES completion:nil];

    newMedia = YES;

}else{
    NSLog(@"Camera is not available");
    UIAlertView *alert1 = [[UIAlertView alloc] initWithTitle:@"Important message" message:@"Unfortunately the camera is not available on your device." delegate:self cancelButtonTitle:@"Ok" otherButtonTitles: nil];
    [alert1 show];
}

}

这段代码展示了一个视图控制器，用户可以从中进行拍摄，但它不是圆形的。

我想做类似 imagePicker.allowsEditing.frame = CGRectMake (30, 100, 200, 200); 但这仍然不会给它圆角。此外，它下面的视图即使可见，也不会响应触摸。有任何想法吗？

编辑：

我试过这个。它给出了圆角，但背景仍然是黑色

imagePicker.modalTransitionStyle = UIModalTransitionStyleCrossDissolve;
    imagePicker.modalPresentationStyle = UIModalPresentationFormSheet;
    [self presentViewController:imagePicker animated:YES completion:nil];

    imagePicker.view.layer.cornerRadius = 100; // this value vary as per your desire
    imagePicker.view.clipsToBounds = YES;
    imagePicker.view.frame = CGRectMake(40,40, 200, 200);
4

1 回答 1

1

您可以使用AVFoundation直接添加相机支持，而不是做模态弹出窗口。苹果开发者网站上已经有一个不错的 iOS相机演示免费提供。

然后，您可以将预览图像附加到 UIViewController 上的 UIImageView 并对其层执行相同的操作以获得所需的效果：

imageView.view.layer.cornerRadius = 100; // this value vary as per your desire
imageView.view.clipsToBounds = YES;
imageView.view.frame = CGRectMake(40,40, 200, 200);
于 2013-08-28T15:57:41.727 回答