iphone - 如何在 iPhone 中使用移动和缩放 UIImagePickerController？

Question

我是 iPhone 开发新手。我正在使用图像选取器 Controller ，我想在其中移动和缩放从照片库中选取的图像，因此我启用了 allowsediting = yes。

我的选择器确实完成了方法:

 - (void) imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
    // Access the uncropped image from info dictionary

    UIImage *image = [info objectForKey:@"UIImagePickerControllerOriginalImage"];
    self.imgForDisplay.image=[self scaleAndRotateImage:image];
    self.imagePicker.allowsEditing = YES;


    ImageDetailsViewController *imageDetailsVC = [[ImageDetailsViewController alloc] init];
    imageDetailsVC.imagedisplay.image = self.imgForDisplay.image;
    [picker pushViewController:imageDetailsVC animated:YES];



//[picker dismissModalViewControllerAnimated:YES];

}

然后我将另一个 View Controller 推送到我想要显示所选图像的位置。

这里我有两个问题:

1) 当我选择图像时，它导航到另一个没有“移动和缩放”屏幕的 View ，但图像现在在导航时显示在 ImageDetailsViewController 中。

2) 当我再次返回并选择另一张图片时，它现在显示“移动和缩放”屏幕。当我点击选择按钮时，它只是显示一个没有导航栏的白屏。

有什么方法可以设置选择按钮的 Action 吗？

Answer 1

我也遇到了同样的问题，我通过使用代码解决了它，通过这个它会很有用。

 - (void)imagePickerController:(UIImagePickerController *)picker  
    didFinishPickingMediaWithInfo:(NSDictionary *)info { 
        self.lastChosenMediaType = [info objectForKey:UIImagePickerControllerMediaType]; 
        if ([lastChosenMediaType isEqual:(NSString *)kUTTypeImage]) { 
            UIImage *chosenImage = [info objectForKey:UIImagePickerControllerEditedImage]; 
            UIImage *shrunkenImage = shrinkImage(chosenImage, imageFrame.size); 
            self.image = shrunkenImage; 
        } else if ([lastChosenMediaType isEqual:(NSString *)kUTTypeMovie]) { 
            self.movieURL = [info objectForKey:UIImagePickerControllerMediaURL]; 
        } 

        ImageSelectionView *imageSelectionVC = [[ImageSelectionView alloc] init];
        imageSelectionVC.theImage = image;
        [picker pushViewController:imageSelectionVC animated:YES];
        imageSelectionVC.dismissDelegate =self;


       // [picker dismissModalViewControllerAnimated:YES]; 
    } 

'

-(void)updateDisplay { 
    if ([lastChosenMediaType isEqual:(NSString *)kUTTypeImage]) { 
        imageView.image = image; 
        imageView.hidden = NO; 
        moviePlayerController.view.hidden = YES; 
    } else if ([lastChosenMediaType isEqual:(NSString *)kUTTypeMovie]) { 
        [self.moviePlayerController.view removeFromSuperview]; 
        self.moviePlayerController = [[MPMoviePlayerController alloc] 
                                       initWithContentURL:movieURL] ; 
        moviePlayerController.view.frame = imageFrame; 
        moviePlayerController.view.clipsToBounds = YES; 
        [self.view addSubview:moviePlayerController.view]; 
        imageView.hidden = YES; 
    } 
}