ios - 按下 actionSheet 按钮后的警告消息

Question

我是 iOS 开发的新手，遇到了一个我似乎无法找到解决方案的错误。我到处寻找解决方案，但也许是我的新奇阻碍了我看到问题。

日志中打印的确切警告是:

在演示或关闭正在进行时尝试从 View Controller <_UIAlertShimPresentingViewController: 0x7aaa4b90> 关闭!

它在我触摸 actionSheet 上的按钮后立即发生。

代码如下:

- (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex {

UIImagePickerController *picker = [[UIImagePickerController alloc] init];
picker.delegate = self;

if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {

    if (buttonIndex == 0) {

        picker.sourceType = UIImagePickerControllerSourceTypeCamera;

        [self presentViewController:picker animated:YES completion:nil];
    }
    else if (buttonIndex == 1) {

        picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;

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

    }
    else if (buttonIndex == 2) {
        picker.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;

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

    }

} else {

    if (buttonIndex == 0) {

        picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;


        [self presentViewController:picker animated:NO completion:NULL];


    }
    else if (buttonIndex == 1) {

        picker.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;

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


    }


}
}

actionSheet 的实现，我将 IBAction 连接到位于 .xib 文件中的工具栏按钮。

   - (IBAction)addImage:(id)sender {

UIActionSheet *popUpSheet = [[UIActionSheet alloc]
                             initWithTitle:nil
                             delegate:self
                             cancelButtonTitle:nil
                             destructiveButtonTitle:nil
                             otherButtonTitles: nil];

if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {

    [popUpSheet addButtonWithTitle:@"Camera"];
    [popUpSheet addButtonWithTitle:@"Photo Library"];
    [popUpSheet addButtonWithTitle:@"Camera Roll"];

    [popUpSheet addButtonWithTitle:@"Cancel"];

    popUpSheet.cancelButtonIndex = popUpSheet.numberOfButtons-1;

}   else {

    [popUpSheet addButtonWithTitle:@"Photo Library"];
    [popUpSheet addButtonWithTitle:@"Camera Roll"];

    [popUpSheet addButtonWithTitle:@"Cancel"];

    popUpSheet.cancelButtonIndex = popUpSheet.numberOfButtons-1;

}

[popUpSheet showFromBarButtonItem: self.toolbarItems[0] animated:YES];  }

据我所知，一切都已正确委派:

DetailViewController.m

@interface DetailViewController () < UINavigationControllerDelegate, UIImagePickerControllerDelegate >

DetailViewController.h

@interface DetailViewController : UIViewController <UIActionSheetDelegate>

任何见解都将不胜感激并且非常有帮助。

Answer 1

您的代码看起来是正确的。尝试使用:

actionSheet:didDismissWithButtonIndex:

方法。它在动画结束后发送给代理。希望对您有所帮助。