Question

我正在使用Image picker Controller来拍照并将它们保存到数据库中。我有这种方法来获取相机拍摄的图像。

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

UIImage *chosenImage = info[UIImagePickerControllerEditedImage];
self.imageView.image = chosenImage;

[picker dismissViewControllerAnimated:YES completion:NULL];

}

此方法在被委派为self时自动调用。当我点击一个按钮时，我试着打电话给这个，但是我无法获得图像。它显示为null。这是我调用picker控制器委托方法的方法。

- (IBAction)save_Image:(id)sender {

UIImagePickerController *saveDelegate;
NSDictionary *infoDelegate;

[self imagePickerController:(saveDelegate) didFinishPickingMediaWithInfo:(infoDelegate)];

UIImage *chosenImage = infoDelegate[UIImagePickerControllerEditedImage];
self.imageView.image = chosenImage;

 //here i couldn't get the image. I am getting null
}

有没有办法通过我自己的方法调用该方法来获取图像？

Answer 1

如果您想通知其他人用户选择图片的时间，这是使用通知的理想场所。

static NSString* const ImagePickerDidFinishPickingPhotoNotification = @"ImagePickerDidFinishPickingPhotoNotification";

@implementation MyViewController

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
    [[NSNotificationCenter defaultCenter] postNotificationName:ImagePickerDidFinishPickingPhotoNotification
                                                        object:picker
                                                      userInfo:info];
}

@end

从另一种方法调用图像选择器控制器委托方法

1 个答案: