如何在 UIImagePickerController 中显示视频或电影文件？答案

【问题标题】：how to show video or movie file into UIImagePickerController?如何在 UIImagePickerController 中显示视频或电影文件？
【发布时间】：2010-06-08 11:36:50
【问题描述】：

我正在使用 UIImagePickerController，它使用户能够选择现有照片或使用相机拍摄图像。我可以使用 UIImageView 在我的应用程序中显示该图像。

现在我也想将这种能力用于电影。但我找不到任何方法在我的应用程序中将所选电影显示为图像，就像照片应用程序一样。如您所知，您可以在同一个列表中查看照片和电影。

【问题讨论】：

为什么要将这些答案添加到您的问题中？如果您想包含代码，请将其放入问题中（并将其格式化为代码 - 您现在这样做的方式非常难以理解）

标签： iphone uiimagepickercontroller

【解决方案1】：

-(IBAction) selectImageSelected : (id)sender
{
    actionSheet = [[UIActionSheet alloc] initWithTitle:@"Select Image" 
                                            delegate:self
                                   cancelButtonTitle:@"Cancel"
                              destructiveButtonTitle:nil
                                   otherButtonTitles:@"Take Picture", @"Select from gallery", nil];
    [actionSheet showInView:self.parentViewController.tabBarController.view];
}

- (void)actionSheet:(UIActionSheet *)_actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex{
    if(buttonIndex==0)
    {
        if( ![UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera] )
        {
            [AlertHandler showAlertMessage:[ErrorMessages getCameraNotFoundMsg] withTitle:@"No Camera Detected"];
            return;
        }
        else
        {
            imagePicker = [[UIImagePickerController alloc] init];
            imagePicker.delegate = self;
            imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera;
            [self presentModalViewController:imagePicker animated:YES];
        }
    }
    else if(buttonIndex==1)
    {
        imagePicker = [[UIImagePickerController alloc] init];
        imagePicker.delegate = self;
        imagePicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
        imagePicker.mediaTypes =[UIImagePickerController availableMediaTypesForSourceType:imagePicker.sourceType];
        [self presentModalViewController:imagePicker animated:YES];
    }
    else
    {
        [actionSheet dismissWithClickedButtonIndex:2 animated:YES];
    }
}

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

    NSString *mediaType = [info objectForKey:UIImagePickerControllerMediaType];

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

        // UIImage *selectedImage = [info objectForKey:UIImagePickerControllerOriginalImage];

        UIImage *image = [info objectForKey:@"UIImagePickerControllerOriginalImage"];

        NSLog(@"found an image");

//      [UIImageJPEGRepresentation(image, 1.0f) writeToFile:[self findUniqueSavePath] atomically:YES];

//      SETIMAGE(image);

        CFShow([[NSFileManager defaultManager] directoryContentsAtPath:[NSHomeDirectory() stringByAppendingString:@"/Documents"]]);

    }

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

        NSURL *videoURL = [info objectForKey:UIImagePickerControllerMediaURL];

        NSLog(@"found a video");

        NSData *webData = [NSData dataWithContentsOfURL:videoURL];

        //NSData *video = [[NSString alloc] initWithContentsOfURL:videoURL];

//      [webData writeToFile:[self findUniqueMoviePath] atomically:YES];

        CFShow([[NSFileManager defaultManager] directoryContentsAtPath:[NSHomeDirectory() stringByAppendingString:@"/Documents"]]);
        CGSize sixzevid=CGSizeMake(imagePicker.view.bounds.size.width,imagePicker.view.bounds.size.height-100);
        UIGraphicsBeginImageContext(sixzevid);
        [imagePicker.view.layer renderInContext:UIGraphicsGetCurrentContext()];
        UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();
        UIGraphicsEndImageContext();
        eventButton.imageView.image=viewImage;
        // NSLog(videoURL);

    }

    [picker dismissModalViewControllerAnimated:YES];

}

/*
- (void)imagePickerController:(UIImagePickerController *)picker 
        didFinishPickingImage:(UIImage *)image editingInfo:(NSDictionary *)editingInfo1
{
    [imagePicker dismissModalViewControllerAnimated:YES];
    imagePicker.view.hidden = YES;
    eventButton.imageView.image = image;
    imageSelected = YES;
}
*/
- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker{
    [imagePicker dismissModalViewControllerAnimated:YES];   
    imageSelected = NO;
}

【讨论】：

【解决方案2】：

MPMoviePlayerController 的 -thumbnailImageAtTime:timeOption: 方法看起来可以帮助您获得要显示的图像。

【讨论】：

【解决方案3】：

只有电影文件的选择器视图

替换

imagePicker.mediaTypes =[UIImagePickerController availableMediaTypesForSourceType:imagePicker.sourceType];

与

picker.mediaTypes = [NSArray arrayWithObject:@"public.movie"];

【讨论】：