ios - 在 UIImagePickerController 中选择图像后，如何设置预览图像的 View ？

Question

我想创建一个 View 来预览您在 UIImagePickerController 中选择的图像后的图像。我尝试创建一个 View Controller 并将选择器 Controller 推送到另一个 View Controller 。

-(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];
 }

如您所见，我尝试将 UIImagePickerController 推送到另一个 View 并尝试预览它。但不幸的是，当我调试它时，ipc对象显示为null。我知道 UIImagePickerController 是从 UINavigationController 继承的。是因为在这个导航 Controller 中找不到我的ipc的 View 吗？如果是，我如何将它添加到 UIImagePickerController 中以便它可以推送到预览 ImageView ？如果没有，如何正确设置预览 ImageView ？

更新:如果我把

    ImagePreviewController *ipc = [ImagePreviewController alloc]init];

相反，当它按下时，它是黑屏。

Answer 1

您应该关闭图像选择器，然后呈现您的自定义 UIViewController 子类

-(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];
    }];
 }