ios - View 未显示在 didFinishPickingMediaWithInfo 中

Question

更新

花了几个小时后，我找到了适合我的解决方案。一个问题是，在选择图像后没有显示 segue。

我还有一个问题，secondView 的标签栏没有显示。但我现在可以看到图像了!!

但是谢谢大家的帮助!!!!

这是我的代码:

//FirstView.m

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)image editingInfo:(NSDictionary *)editingInfo{
    self->takenImage = image;
    [picker dismissModalViewControllerAnimated:NO];
    double delayInSeconds = 0.5;
    dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, delayInSeconds * NSEC_PER_SEC);
    dispatch_after(popTime, dispatch_get_main_queue(), ^(void){
        [self performSegueWithIdentifier:@"ToSecondView" sender:self];
    });
}

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender{
    if ([segue.identifier isEqualToString:@"ToSecondView"]){
        SecondView *editViewController =
        (SecondView *)segue.destinationViewController;
        //editViewController.imageView.image = self->takenImage;
        [editViewController setMyImage:takenImage];
    }
}

//SecondView.h

@property (nonatomic, strong) UIImage *myImage;

//viewDidLoad中的SecondView.m

self.imageView.image = _myImage;

---

更新:为了更好地理解，我发布了我的其余代码:

第一 View :

@interface FirstView : UIViewController <UIImagePickerControllerDelegate, UINavigationControllerDelegate>

@end


- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
    UIImage *image = [info objectForKey:@"UIImagePickerControllerOriginalImage"];
    [picker dismissViewControllerAnimated:YES completion:^{
        SecondView *svc = [[ShowPicture alloc] initWithNibName:@"SecondView" bundle:nil];
        [svc setMyImage:image];
        [self presentViewController:svc animated:YES completion:nil];
    }];
}

** 第二 View **:

@interface ShowPicture: UIViewController
@property (nonatomic, retain) UIImageView *imageView;
@property (nonatomic, strong) UIImage *myImage;



-(void)viewDidLoad{
    UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(85, 90, 150, 150)];
    self.imageView.image = _myImage;
    [[self view] addSubview: imageView];
}

---

我真的很绝望。我想用 UIImagePickerController 选择一张照片并在另一个 View 中显示它。在尝试了不同的方法后，我无法显示第二个 View ，也就是应该放置图像的位置。

我的代码:

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
    UIImage *image = [info objectForKey:@"UIImagePickerControllerOriginalImage"];
    [picker dismissViewControllerAnimated:YES completion:^{
        SecondView *svc = [[SecondView alloc] initWithNibName:@"SecondView" bundle:nil];
        svc.imageView.Image = image;
        [self presentViewController:svc animated:YES completion:nil];
    }];
}

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
    if ([segue.identifier isEqualToString:@"toSecondView"]){
        ShowPicture *showPicture =
        (ShowPicture *)segue.destinationViewController;
        //showPicture.imageView.image = self.imageChosen;

    SecondView Picture *cvc = [segue destinationViewController];
    cvc.image = newImage;
    }
}

当我单击“选择按钮”时，屏幕会转到 View ，您可以在其中看到相册..

我做错了什么？？ :/非常感谢

Answer 1

在这里:

    ShowPicture *svc = [[ShowPicture alloc] initWithNibName:@"ShowPicture" bundle:nil];
    svc.imageView.Image = image;

svc.imageView 对象尚未创建。

对于解决方案，您可以将 ShowPicture 的属性定义为:

    @property (nonatomic, strong) UIImage *myImage;

并将您的拣选委托(delegate)函数更改为:

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
    UIImage *image = [info objectForKey:@"UIImagePickerControllerOriginalImage"];
    [picker dismissViewControllerAnimated:YES completion:^{
        ShowPicture *svc = [[ShowPicture alloc] initWithNibName:@"ShowPicture" bundle:nil];
        [svc setMyImage:image];
        [self presentViewController:svc animated:YES completion:nil];
    }];
}

最后在 ShowPicture ViewController 的 viewDidLoad 方法中:

self.imageView.image = _myImage;