如何在UIImagePickerController中選擇圖像後設置預覽圖像的視圖？

Question

我想在UIImagePickerController中選擇一個圖像後創建一個預覽圖像的視圖。我試圖創建一個視圖控制器，並推動選擇器控制器到另一個視圖控制器。

-(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，我試圖將UIImagePickerController推送到另一個視圖並嘗試預覽它。但不幸的是，當我調試它時，ipc對象顯示爲空。我明白，UIImagePickerController是從UINavigationController繼承的。是否因爲在此導航控制器中找不到我的ipc視圖？如果是的話，我如何將它添加到UIImagePickerController中，以便它可以推送到預覽圖像視圖？如果不是，我如何正確設置預覽圖像視圖？

更新：如果我把

ImagePreviewController *ipc = [ImagePreviewController alloc]init]; 

相反，當它推動，這是一個黑色的屏幕。

Answer 1

您應該駁回影像選擇器，然後出示您的自定義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]; 
    }]; 
}