ios - "imagePickerController:didFinishPickingMediaWithInfo:""UIImagePickerControllerMediaURL"信息字典中的关键异常行为

Question

在“imagePickerController:didFinishPickingMediaWithInfo:”中，信息字典有时没有关键字“UIImagePickerControllerMediaURL”。有时确实有。我尝试清理目标，但没有帮助。此外，工作流程始终相同:我遵循相同的步骤并从库中选择相同的视频文件。有时信息字典中有“UIImagePickerControllerMediaURL”键，有时“UIImagePickerControllerMediaURL”在同一文件的信息字典本身中不存在。听不懂。有人可以帮忙吗？

当我从照片库中选择视频/电影时，这是我的 NSLog 信息字典:

info dict = {
    UIImagePickerControllerMediaType = "public.movie";
    UIImagePickerControllerReferenceURL = "assets-library://asset/asset.MOV?id=1000000466&ext=MOV";
} 

Answer 1

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info

{ 
    NSMutableDictionary *infoDict = [[NSMutableDictionary alloc]init];

    NSString *mediaType = [info objectForKey:UIImagePickerControllerMediaType];

    if ([mediaType isEqualToString:@"public.image"]){

        UIAlertView *myAlertView = [[UIAlertView alloc] initWithTitle:@"" message:@"You Select a image Please select Movie" delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil];

        [myAlertView show];

        [myAlertView release];

    }

    else if ([mediaType isEqualToString:@"public.movie"]){

        NSURL *videoURL = [info objectForKey:UIImagePickerControllerMediaURL];

        mAppDelegate.uploadType = @"Video";

        NSData *webData = [NSData dataWithContentsOfURL:videoURL];

        [infoDict setValue:webData forKey:@"VideoUrl"];

        [infoDict setValue:[[mAppDelegate.userInfoArray objectAtIndex:1]valueForKey:@"user_id"] forKey:@"user_id"];

        [[WakeUpParsing sharedInstance] assignSender:self];

        [[WakeUpParsing sharedInstance] startParsingForVedioUploade:infoDict];

    }

    [picker dismissModalViewControllerAnimated:YES];

    [infoDict release];

}


- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker

{

    // Dismiss the image selection and close the program
    [[picker parentViewController] dismissModalViewControllerAnimated:YES];

}