Question

我正在使用ipad模拟器测试ipad相机应用程序我使用下面的代码，更改源类型而不是相机。

  -(IBAction)useCamera:(id)sender{


    if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypePhotoLibrary]){

    UIImagePickerController *imagePicker = 
    [[UIImagePickerController alloc] init];
    imagePicker.delegate =(id<UINavigationControllerDelegate,UIImagePickerControllerDelegate>) self;
    imagePicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
    imagePicker.mediaTypes = [NSArray arrayWithObjects:(NSString *) kUTTypeImage,nil];
    imagePicker.allowsEditing = NO;
    [self presentModalViewController:imagePicker animated:YES];

    [imagePicker release];
    newMedia = YES;

    }

}

当它在模拟器中运行时，ios 5模拟器出现错误。

   Terminating app due to uncaught exception 'NSInvalidArgumentException', reason:'On iPad,     UIImagePickerController must be presented via UIPopoverController'

但是它在4.3模拟器上工作

Answer 1

从iOS5开始，您需要在弹出视图而不是模态视图中显示pickercontroller。

来自Apple文档：在iPad上，使用弹出窗口显示用户界面。仅当图像选择器控制器的sourceType属性设置为UIImagePickerControllerSourceTypeCamera时，这样做才有效。要使用弹出控制器，请使用UIPopoverController类参考中“演示和解除弹出窗口”中描述的方法。

http://developer.apple.com/library/ios/#documentation/uikit/reference/UIImagePickerController_Class/UIImagePickerController/UIImagePickerController.html

以下是在弹出视图中显示UIImagePickerController的示例：

UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];
imagePicker.delegate = self;
imagePicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
popover = [[UIPopoverController alloc] initWithContentViewController:imagePicker];
[popover presentPopoverFromRect:CGRectMake(0.0, 0.0, 400.0, 400.0) 
                     inView:self.view
                     permittedArrowDirections:UIPopoverArrowDirectionAny 
                     animated:YES];

使用xcode模拟器IOS 5测试ipad 2相机

1 个答案: