Question

我有一个拆分视图，包含主表视图和详细视图。在我的分割视图主视图的导航栏上，我有一个按钮，可以让用户通过imagePicker拍照。但是当我按下按钮时，我的程序会一直崩溃。这是按下按钮时调用的MasterViewController.m的过程：

-(void) takePicture:(id) sender
{

UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];

if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera])
{
    [imagePicker setSourceType:UIImagePickerControllerSourceTypeCamera];
}
else
{
    [imagePicker setSourceType:UIImagePickerControllerSourceTypePhotoLibrary];
}

[imagePicker setDelegate:self];

//[self presentViewController:imagePicker animated:YES completion:nil];

if( UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad)
{
    UIPopoverController * popOverController = [[UIPopoverController alloc] initWithContentViewController:imagePicker];
    [popOverController presentPopoverFromRect:((UIButton *)sender).frame inView:self.view permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];
    //[popOverController presentPopoverFromRect:CGRectMake(700, 1000, 10, 10) inView:self.detailViewController.imageSpace permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];

}else {

    [self presentViewController:imagePicker animated:YES completion:nil];
}

}

这是错误信息：

2013-02-11 09:06:43.975 ImageSplit2[13044:c07] -[UIBarButtonItem frame]: unrecognized selector sent to instance 0x7183d00
2013-02-11 09:06:43.976 ImageSplit2[13044:c07] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[UIBarButtonItem frame]: unrecognized selector sent to instance 0x7183d00'

Answer 1

sender不是UIButton，而是UIBarButtonItem，它不是视图，因此没有frame属性。

改变这个：

[popOverController presentPopoverFromRect:((UIButton *)sender).frame inView:self.view permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];

为：

[popOverController presentPopoverFromBarButtonItem:(UIBarButtonItem *)sender permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];

附注：如果从照片库中选择图像，则必须在iPad上使用弹窗框。然而，将基于相机的图像选择器呈现为全屏视图控制器是完全有效的。因此，您可能希望更改if声明：

if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad)

为：

if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad && imagePicker.sourceType != UIImagePickerControllerSourceTypeCamera)

带有SplitViewController的iPad上的iOS Imagepicker

1 个答案: