Question

我有一个通用的应用程序，允许从设备照片库中选择一个图像供以后操作，代码在iPad上正常工作，但iPhone上没有任何反应，甚至取消按钮也没有，在选择图像后没有任何反应这里既不是我的代码：

-(IBAction)grabImage:(id)sender
{
    if ( UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad )
{
    imgPicker = [[UIImagePickerController alloc] init];
    [imgPicker setDelegate:self];

    popover = [[UIPopoverController alloc] initWithContentViewController:imgPicker];
    [popover setDelegate:self];

    CGPoint position        = [view1.superview convertPoint:view1.frame.origin toView:nil];
    CGRect popOverFrame     = CGRectMake( position.x, position.y, self.view.frame.size.width, self.view.frame.size.height );

    [popover presentPopoverFromRect:popOverFrame inView:self.view permittedArrowDirections:nil animated:NO];
    [popover setPopoverContentSize:CGSizeMake(320, 480)];
    [imgPicker release];
}
else
{
    imgPicker = [[UIImagePickerController alloc] init];
    imgPicker.delegate = self;
    imgPicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
    [self presentModalViewController:self.imgPicker animated:YES];
    [imgPicker release];
}
}


-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
    pickedImage = [info objectForKey:UIImagePickerControllerOriginalImage];

CGImageRef imgRef = pickedImage.CGImage;

    app->setImage( pickedImage, CGImageGetWidth(imgRef), CGImageGetHeight(imgRef) );

    [[picker parentViewController] dismissModalViewControllerAnimated:YES];

// Enable texture siwth after an image has been loaded
[textureSwitch setEnabled:YES];
[textureSwitch setOn:YES];
app->isTextureDrawingOn     = [textureSwitch isOn];

[fillsSwitch setOn:NO];
app->isFillsDrawingOn       = [fillsSwitch isOn];

    if ( UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad )
{
    [popover dismissPopoverAnimated:YES];
}
ofLog(OF_LOG_VERBOSE, "cancel after selection");
}

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

if ( UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad )
{
        [popover dismissPopoverAnimated:YES];
    }

ofLog(OF_LOG_VERBOSE, "did cancel");
}

Answer 1

而不是使用下面的代码。

[[picker parentViewController] dismissModalViewControllerAnimated:YES];

试试此代码

[self dismissModalViewControllerAnimated:YES];

并检查您是否在界面文件中添加了UIImagePickerControllerDelegate。

解决方案:(来自我的评论）

试试这个[self.imgPicker dismissModalViewControllerAnimated:YES]; 这将有效。

对于iOS 7：要关闭当前视图控制器

[self.imgPicker dismissViewControllerAnimated: YES completion: NULL];

Answer 2

在您的界面文件中添加UIImagePickerControllerDelegate

然后在.m文件

中实现此代码

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

我希望它能解决你的问题。

Answer 3

检查调用选择器的父控制器的viewWillAppear或viewDidAppear方法。在iPhone上，这个方法将在选择器视图消失后调用。在popover消失在iPad上后，它们不会被调用。我刚刚在我的代码中发现错误，我在viewWillAppear中为所选图像设置nil为ivar。我花了两天时间来了解发生的事情;）祝你好运！

Answer 4

最简单的解决方案：

在界面文件中添加UIImagePickerControllerDelegate

然后在.m文件中实现此代码

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

Answer 5

Swift 3.0

感谢MBH，这对我的Xcode 8和iOS 10项目起了作用：

internal func imagePickerControllerDidCancel(_ picker: UIImagePickerController){
    dismiss(animated: true, completion: nil)
}

Answer 6

在Swift中关闭它：

将这些协议添加到ViewController：UINavigationControllerDelegate, UIImagePickerControllerDelegate

之后

internal func imagePickerControllerDidCancel(picker: UIImagePickerController){
    dismissViewControllerAnimated(true, completion: nil)
}

UIImagePickerController取消按钮无法正常工作的问题

6 个答案: