使用的UIImagePickerController问题取消按钮不工作

Question

我有一个通用的应用程序，允许选择从设备的照片库中供以后处理的图像，代码工作正常在iPad上，但什么也没有发生在iPhone，甚至没有取消按钮，选择图像后没有任何事情发生，这里是我的代码：

-(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]; 

试试这个代码

[self dismissModalViewControllerAnimated:YES]; 

，并检查你在接口文件中添加UIImagePickerControllerDelegate。

解决方案：（从我的意见）

试试这个[self.imgPicker dismissModalViewControllerAnimated:YES]; 这将工作。

对于iOS 7：要关闭当前视图控制器

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

Answer 2

在接口文件

添加UIImagePickerControllerDelegate，然后执行该代码在你.m文件

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

我希望它能解决你的问题。

Answer 3

检查viewWillAppear中或调用选择器的父控制器的viewDidAppear方法。在iPhone上，这个方法将在拾取器视图消失后被调用。 Popover在iPad上消失后，它们将不会被调用。我只是在我的代码中发现错误，我在viewWillAppear中将所选图像设置为ivar。需要两天的时间才能了解发生的情况;） 祝你好运！

Answer 4

一个简单的解决方案：

添加UIImagePickerControllerDelegate在接口文件

，然后在.m文件

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

Answer 5

实现该代码对于斯威夫特关闭它：

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

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

Answer 6

雨燕3.0

由于MBH这在我的Xcode 8和iOS的10项目工作对我来说：

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