“imagePickerController：didFinishPickingMediaWithInfo：” “UIImagePickerControllerMediaURL”信息字典中的关键奇怪行为

Question

在“imagePickerController:didFinishPickingMediaWithInfo:”中，信息字典有时没有键“UIImagePickerControllerMediaURL”。有时确实有。我尝试清洁目标，但这没有帮助。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。有时信息字典中包含“UIImagePickerControllerMediaURL”键，有时同一文件的信息字典本身中不存在“UIImagePickerControllerMediaURL”。无法理解。有人可以帮忙吗？

这是我从照片库中选择视频/电影时的信息字典的 NSLog ：

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];

}

Answer 2

当您的帐户视频保存在 iCloud 上时，就会发生这种情况。当您选择视频时，它会暂时从 icloud 下载并显示给您，因此 UIImagePickerControllerMediaURL 将不会出现。