Question

到目前为止，这是我的代码：

/* class: myViewController
@interface myViewController: UIViewController
       <UIImagePickerControllerDelegate, UINavigationControllerDelegate>
*/
- (IBAction) getPicture {
    UIImagePickerController * picker = [[UIImagePickerController alloc] init];
       picker.delegate = self;
       picker.sourceType = UIImagePickerControllerSourceTypeCamera;
       [self presentModalViewController:picker animated:YES];
}

- (void) imagePickerController:(UIImagePickerController *)thePicker 
                    didFinishPickingMediaWithInfo:(NSDictionary *)imageInfo
{
    [[thePicker parentViewController] dismissModalViewControllerAnimated:YES];
       UIImage *img = [imageInfo
                           objectForKey:@"UIImagePickerControllerOriginalImage"];
    self.myImageView.image = img;
}

所以基本上我试图从iPhone相机中获取照片并将其显示在UIImageView中。只要myViewController类显示为独立视图，这就完美无缺。如果我将View放在UINavigationController中，UIImageView在使用相机拍摄之后将不会显示图像。但如果我从图书馆中选择一张图片，一切都会好起来的。

那么为什么UIImageView不会在UINavigationController中显示用相机拍摄的图像？

Answer 1

尝试切换以下行：

[thePicker dismissModalViewControllerAnimated:YES];
UIImage *img = [imageInfo objectForKey:@"UIImagePickerControllerOriginalImage"];
self.myImageView.image = img;

以下内容：

UIImage *img = [imageInfo objectForKey:@"UIImagePickerControllerOriginalImage"];
self.myImageView.image = img;
[thePicker dismissModalViewControllerAnimated:YES];

也许是因为在使用

保留视图之前解除了视图而释放了图像

self.myImageView.image = img;

Answer 2

在我看来你是在解雇错误的viewcontroller。不应：

[thePicker dismissModalViewControllerAnimated:YES];

读：

[self dismissModalViewControllerAnimated:YES];

iPhone SDK - 如何在UINavigationController中显示使用相机拍摄的照片？

2 个答案: