Question

我在iOS中使用以下代码从照片库中选择图像。我需要在不同的视图中显示此图像。我该怎么办？

//delegate methode will be called after picking photo either from camera or library
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
    [self dismissViewControllerAnimated:NO completion:nil];
    UIImage *image = [info objectForKey:UIImagePickerControllerOriginalImage];
    NSArray *theViewControllers = [self.tabBarController viewControllers];

    [imgview setImage:image]; //set in image view

    [self performSegueWithIdentifier:@"NextView" sender:nil];
}

我尝试使用下面的代码在下一个视图中显示图像，但它不起作用？

//delegate methode will be called after picking photo either from camera or library
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
    [self dismissViewControllerAnimated:NO completion:nil];
    UIImage *image = [info objectForKey:UIImagePickerControllerOriginalImage];
    NSArray *theViewControllers = [self.tabBarController viewControllers];

    //[imgview setImage:image]; //set in image view
    ImageViewController *adjViewController = (ImageViewController *)[theViewControllers objectAtIndex:0];
    [adjViewController.imageview1 setImage :image]; 

    [self performSegueWithIdentifier:@"NextView" sender:nil];        
}

Answer 1

您可以将UIImage *image（从您的imagePickerController方法）全局变为其视图控制器，然后将其传递给prepareForSegue。

例如：

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
    if ([[segue identifier] isEqualToString:@"NextView"]) {
        ImageViewController *vc = [segue destinationViewController];
        [vc setImage:image];
    }
}

然后在你的ImageViewController.h中你只需要：

@interface ImageViewController : UIViewController {
    UIImage *image;
}
@property (nonatomic, retain) UIImage *image;

然后在.m中合成它并将图像设置为imageView中的viewWillAppear。您可以阅读prepareForSegue here的文档。

如何在另一个视图中显示在一个视图中选择的图像

1 个答案: