1

我有一个带有主表视图和详细视图的拆分视图。在我的拆分视图的主视图的导航栏上，我有一个按钮，应该使用户能够通过 imagePicker 拍照。但是当我按下按钮时，我的程序不断崩溃。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];
}

}

这是错误消息：

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'
4

1 回答 1

0

sender不是 a UIButton，它是 a UIBarButtonItem，它不是视图，因此它没有frame属性。

改变这个：

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

至：

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

旁注：如果从照片库中选择图像，您必须在 iPad 上使用弹出框。但是，将基于摄像头的图像选择器呈现为全屏视图控制器是完全有效的。因此，您可能希望将您的if声明从：

if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad)

至：

if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad && imagePicker.sourceType != UIImagePickerControllerSourceTypeCamera)
于 2013-02-11T18:57:12.040 回答