Question

我的代码发生了一些奇怪的事情。

场景：打开相机 - ＆gt;拍照 - ＆gt;将拍摄的图像传递给视图控制器（来自故事板。

问题是我的目标视图中的UIimage变量不可用，无法识别！

我的代码

 postviewController.h

#import <UIKit/UIKit.h>
@interface postAlertViewController : UIViewController
@property (nonatomic, retain) UIImage *cameraImage;
@end

 postviewController.m

- (void)viewDidLoad
{
    [super viewDidLoad];
   UIImageView *aImageview=[[UIImageView alloc]initWithFrame:CGRectMake(0, 60, self.view.frame.size.width,150 )];
    aImageview.image=cameraImage;
    [self.view addSubview:amageview];
}

拍照并将其传递给上面的视图控制器

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
    [self dismissViewControllerAnimated:YES completion:NULL];
    ViewController *postView = [self.storyboard  instantiateViewControllerWithIdentifier:@"postview"];
    postView.cameraImage=(UIImage *)[info objectForKey:UIImagePickerControllerEditedImage];
    [self.navigationController pushViewController:postView animated:YES];
}

stroryboard ID设置为“postview”。我得到的是：

Property 'cameraImage' not found on object of type 'ViewController *'

为什么cameraImage在原点视图中不可用，尽管在目标的.h文件中声明了？

在另一种情况下，我需要在视图之间传递字符串，方式与上面相同

[yourViewController setValue:mysc.title forKey:@"sendAlertTitle"];

工作正常。

任何帮助？

谢谢。

Answer 1

试试这个

postAlertViewController *postView = [self.storyboard  instantiateViewControllerWithIdentifier:@"postview"];

并始终使用类和接口名称以大写

开头

Answer 2

你可以更轻松地使用这个。

- (IBAction)captureImage:(id)sender
{
    if (! [UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {

        UIAlertView *deviceNotFoundAlert = [[UIAlertView alloc] initWithTitle:@"No Device" message:@"Camera is not available"
                                                                     delegate:nil
                                                            cancelButtonTitle:@"Okay"
                                                            otherButtonTitles:nil];
        [deviceNotFoundAlert show];

    } else {

        UIImagePickerController *cameraPicker = [[UIImagePickerController alloc] init];
        cameraPicker.sourceType = UIImagePickerControllerSourceTypeCamera;
        cameraPicker.delegate =self;
        // Show image picker
        [self presentViewController:cameraPicker animated:YES completion:nil];
    }
}



-(void)imagePickerController:(UIImagePickerController*)picker didFinishPickingMediaWithInfo:(NSDictionary*)info
{

    UIImage *selectedImage =[info objectForKey:UIImagePickerControllerOriginalImage];

    ViewControllerName *Vc=[self.storyboard instantiateViewControllerWithIdentifier:@"captioEdit"];

    Vc.postImgStr=[self scaleAndRotateImage:selectedImage];

    [picker dismissViewControllerAnimated:YES completion:nil];

    [self.navigationController pushViewController:captioViewEdit animated:YES];
}

//Delegate method of UIImagePickerController for image picker model cancel
- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker {
    [picker dismissViewControllerAnimated:YES completion:nil];

}

由于

将图像从相机传递到故事板中查看

2 个答案: