Ipad照片选择器

Question

我想让IPAD从相册中选择一张照片

            pickerController = [ [ UIImagePickerController alloc ] init ] ;
            pickerController.delegate   = self ;
            pickerController.editing    = NO ;
            pickerController.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;

            [ self presentViewController : pickerController animated : YES completion : nil ] ;

当我在iPad上使用它时,该应用程序不断崩溃,但在iPhone上运行良好.

Answer 1

这个也让我受够了.在iPad上,如果指定源类型,UIImagePickerControllerSourceTypePhotoLibrary或者UIImagePickerControllerSourceTypeSavedPhotoAlbum需要使用弹出控制器显示图像选择器控制器.如果你尝试以模态方式呈现它,就像你正在做的那样,你会得到一个例外.

不是100%要求,但使用测试来查看可用的源类型也是一个好主意.

[UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypePhotoLibrary]

源类型是:

• UIImagePickerControllerSourceTypePhotoLibrary
• UIImagePickerControllerSourceTypeSavedPhotosAlbum
• UIImagePickerControllerSourceTypeCamera

这就是我如何解决这个问题,以测试它是否是iPad.

if( UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad){

    UIPopoverController* popOverController = [[UIPopoverController alloc] initWithContentViewController:imagePickerController];
    [popOverController presentPopoverFromRect:selectVideoToViewButton.bounds inView:self.view permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];

}else {
    [self presentModalViewController:self.imagePickerController animated:YES];
}