Question

当点击了条形按钮项时，弹出视图显示正常，但在选择照片时不会忽略。我错过了什么吗？我该怎么办？

-(IBAction)addPhoto:(UIBarButtonItem *)sender
{
    UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];
    popover = [[UIPopoverController alloc] initWithContentViewController:imagePicker];
    [popover presentPopoverFromBarButtonItem:sender permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];
}

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)selectedImage editingInfo:(NSDictionary *)editingInfo
{   
    // Delete any existing image.
    NSManagedObject *oldImage = imageClass.image;
    if (oldImage != nil)
    {
        [imageClass.managedObjectContext deleteObject:oldImage];
    }

    // Create an image object for the new image.
    NSManagedObject *myImage = [NSEntityDescription insertNewObjectForEntityForName:@"Image" inManagedObjectContext:imageClass.managedObjectContext];
    imageClass.image = myImage;

    // Set the image for the image managed object.
    [image setValue:selectedImage forKey:@"image"];

    [popover dismissPopoverAnimated:YES];
}


- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker
{
    [[picker parentViewController] dismissViewControllerAnimated:YES completion:nil];
}

Answer 1

问题是你试图解雇图像选择器控制器，但是你需要关掉它所在的弹出窗口。事情需要根据它们的呈现方式被解雇。

变化：

[self dismissViewControllerAnimated:YES completion:nil];

为：

[popover dismissPopoverAnimated:YES];

如果您拨打了dismissViewControllerAnimated:completion:，则会使用presentViewController:animated:completion:。

Answer 2

要从库中选择照片时关闭UIPopoverViewController，您需要在选择图像后在didFinishPickingMediaWithInfo方法中添加以下行。

- (void)imagePickerController:(UIImagePickerController *)imagePicker didFinishPickingMediaWithInfo:(NSDictionary *)info {
     [popover dismissPopoverAnimated:YES];
     [imagePicker dismissModalViewControllerAnimated:YES];
}

Answer 3

您尚未将delegate的{{1}}设置为自我。另外，您需要将imagePicker作为实例变量以在委托方法中解除。

Answer 4

1）在你.h你必须添加<UIImagePickerControllerDelegate> 2）添加imagePicker.delegate=self;，因此您的addPhoto方法应如下所示：

-(IBAction)addPhoto:(UIBarButtonItem *)sender {
UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];
imagePicker.delegate=self;  //add this line to your code
popover = [[UIPopoverController alloc]
           initWithContentViewController:imagePicker];

[popover presentPopoverFromBarButtonItem:sender
                permittedArrowDirections:UIPopoverArrowDirectionAny
                                animated:YES];
}

Answer 5

只需在UIPopoverControllerDelegate文件

中提供代理UIImagePickerControllerDelegate和.h

Answer 6

您必须将UIImagePickerControllerDelegate添加到相应的.h文件中并检查此代码

 -(IBAction)addPhoto:(UIBarButtonItem *)sender 
{
  UIImagePickerController *imagePicker3 = [[UIImagePickerController alloc] init];
  imagePicker3.delegate = self;
  imagePicker3.sourceType = UIImagePickerControllerSourceTypeCamera;
  imagePicker3.allowsEditing = YES;
  imagePicker3.mediaTypes = [NSArray arrayWithObject:@"public.image"]
  [self presentModalViewController:imagePicker3 animated:YES];

}
-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info { 
[self dismissModalViewControllerAnimated:YES];
_imageselected.image=[info valueForKey:UIImagePickerControllerEditedImage];

}
- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker {
[self dismissModalViewControllerAnimated:YES];

 }

Answer 7

如果在使用UIImagePickerController时有人仍然遇到这个臭名昭着的错误：

Assigning to 'id <UINavigationControllerDelegate,UIImagePickerControllerDelegate>' from   incompatible type 'DetailViewController *const __strong'

尝试移动

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

到

- (void)viewDidLoad{
  //do your stuff
}

并且不要忘记在相应的.h文件中包含委托协议定义（＆lt; UINavigationControllerDelegate，UIImagePickerControllerDelegate＆gt;）。

这解决了我的问题，希望它会帮助别人。不知道它是否是最好的解决方案，但在类似情况下为我工作。

当图片被点击时，图像选择器不会消失

7 个答案: