ios - 将拍摄的图像分配给 image view.image

Question

我有最初隐藏的 ImageView 。当我点击 TakePhotoButton 然后它拍摄图像并将其分配给 ImageView 。然后 ImageView 可见。

当我调试我的代码时，我总是得到我的 productImg 是 nil，即使 chosenImage 不是 nil。

@property (strong, nonatomic) IBOutlet UIImageView *productImg;

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

   UIImage *chosenImage = info[UIImagePickerControllerEditedImage];
   self.productImg.hidden=NO;
   self.productImg.image=chosenImage;

   [picker dismissViewControllerAnimated:YES completion:NULL];

 }

Answer 1

试试这个:

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
    __block MyViewController *aBlockSelf = self; // Replace MyViewController with your View Controller

    UIImage *chosenImage = info[UIImagePickerControllerEditedImage];

    [picker dismissViewControllerAnimated:YES completion:^{
        aBlockSelf.productImg.hidden = NO;
        aBlockSelf.productImg.image = chosenImage;
    }];
}