iOS：如何将当前UIView中的当前图像保存到相册？ 我被UIImageWriteToSavedPhotosAlbum困住了

Question

我的当前图像可以前后滑动。 所有图像都在一个名为页面的文件夹中。 因此，当我处于当前视图中时，我有一个IBAction将当前图像保存到相册中。 如何执行该任务？ 我已经研究过了，但是我不知道如何开始，我陷入了困境。

M档：

我定义了UIImage.h

void UIImageWriteToSavedPhotosAlbum (
   UIImage  *image,
);

- (IBAction)saveMe{

   [UIImageWriteToSavedPhotosAlbum];

}

我的修正代码：

-(IBAction) saveToPhotoAlbum{




}

- (void) imageViewController:(UIImageView *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{

    UIImage *image = //i have 6 current UIImageview on my current main view. How do I get stated?



    UIImageWriteToSavedPhotosAlbum(image, self, @selector(image:didFinishSavingWithError:contextInfo:), nil);






    [picker release];
}




- (void)image:(UIImage *)image didFinishSavingWithError:(NSError *)error contextInfo:(void *)contextInfo
{
    UIAlertView *alert;


    if (error)
        alert = [[UIAlertView alloc] initWithTitle:@"Error" 
                                           message:@"Unable to save image to Photo Album." 
                                          delegate:self cancelButtonTitle:@"Ok" 
                                 otherButtonTitles:nil];
    else 
        alert = [[UIAlertView alloc] initWithTitle:@"Success" 
                                           message:@"Image saved to Photo Album." 
                                          delegate:self cancelButtonTitle:@"Ok" 
                                 otherButtonTitles:nil];
    [alert show];
    [alert release];
}

Answer 1

根据上下文绘制uiview

UIGraphicsBeginImageContext(size);
[self.view.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();

并使用UIImageWriteToSavedPhotosAlbum(UIImage *image, id completionTarget, SEL completionSelector, void *contextInfo); 用于保存到相册