如何在UIImagePickerController中选择图像后设置预览图像的视图？

Question

我想在UIImagePickerController中选择一个图像后创建一个预览图像的视图。我试图创建一个视图控制器，并推动选择器控制器到另一个视图控制器。

-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info 
{ 
    ImagePreviewController *ipc = [self.storyboard instantiateViewControllerWithIdentifier:@"ImagePreviewController"]; 
    UIImage * image = [info valueForKey:UIImagePickerControllerOriginalImage]; 

    ipc.selectedImage = image; 
    [picker pushViewController:ipc animated:YES]; 
} 

正如你所看到的，我试图将UIImagePickerController推送到另一个视图并尝试预览它。但不幸的是，当我调试它时，ipc对象显示为空。我明白，UIImagePickerController是从UINavigationController继承的。是否因为在此导航控制器中找不到我的ipc视图？如果是的话，我如何将它添加到UIImagePickerController中，以便它可以推送到预览图像视图？如果不是，我如何正确设置预览图像视图？

更新：如果我把

ImagePreviewController *ipc = [ImagePreviewController alloc]init]; 

相反，当它推动，这是一个黑色的屏幕。

Answer 1

您应该驳回影像选择器，然后出示您的自定义UIViewController子

-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info 
{ 
    UIViewController *presentingViewController = picker.presentingViewController; 
    ImagePreviewController *ipc = [self.storyboard instantiateViewControllerWithIdentifier:@"ImagePreviewController"]; 
    UIImage * image = [info valueForKey:UIImagePickerControllerOriginalImage]; 

    ipc.selectedImage = image; 

    [presentingViewController dismissViewControllerAnimated:YES completion:^(BOOL animated){ 
     [presentingViewController presentViewController:ipc animated:YES completion:nil]; 
    }]; 
}