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我的目标是让用户从 a 中捕获屏幕截图UIwebView，然后将图像加载到UIPopoverController. 然后UIPopoverController，用户可以裁剪并保存图像。

到目前为止，我可以将屏幕截图保存为UIImage. 然后，我的UIPopoverController弹出但没有保存的图像。这是因为我imagePicker sourceType = UIImagePickerControllerSourceTypePhotoLibrary;会用什么来代替它？？？

-(UIImage*)captureScreen:(UIView*) viewToCapture
{    
    UIGraphicsBeginImageContext(viewToCapture.bounds.size);
    [viewToCapture.layer renderInContext:UIGraphicsGetCurrentContext()];
    UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();

    imageView.image = viewImage;

    [imageView setHidden:NO];

    // this removes current view ie photoLibary
    [self dismissViewControllerAnimated:YES completion:NULL];

    // this checks that a popover is not already in view
    if ([popoverController isPopoverVisible]) 
   {
        // if yes - remove
        [popoverController dismissPopoverAnimated:YES];

   } 
   else 
   {     
        // create an imagePicker

        UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];

        imagePicker.delegate = self;
        imagePicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;

        imagePicker.allowsEditing = YES;


        // create an PopoverController
        popoverController = [[UIPopoverController alloc]
                             initWithContentViewController:imagePicker];



        popoverController.delegate = self;


        UIView *popView = [[UIView alloc]initWithFrame:CGRectMake(0, 0, 500, 500)];
        [self.view addSubview:popView];

        [popoverController presentPopoverFromRect:CGRectMake(100,200, 565, 545)
                                           inView:self.view
                         permittedArrowDirections:0
                                         animated:YES];
    }

    return viewImage;
}
4

2 回答 2

2

使用以下代码将图像保存到相册中。

UIImageWriteToSavedPhotosAlbum(imageToBeSaved, nil, nil, nil);

您可以参考文档以了解有关该功能的更多信息。

于 2013-06-24T11:47:34.073 回答
1

添加此代码

UIImageWriteToSavedPhotosAlbum（图像，无，无，无）

像这样

-(UIImage*)captureScreen:(UIView*) viewToCapture{

        UIGraphicsBeginImageContext(viewToCapture.bounds.size);
        [viewToCapture.layer renderInContext:UIGraphicsGetCurrentContext()];
        UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();
        UIGraphicsEndImageContext();

        imageView.image = viewImage;


            UIImageWriteToSavedPhotosAlbum(viewImage, nil, nil, nil);
  [self dismissViewControllerAnimated:YES completion:NULL];
    [self performSelector:@selector(call) withObject:nil afterDelay:.3];

        }

-(void)call
{
 if ([popoverController isPopoverVisible]) {

    // if yes - remove
    [popoverController dismissPopoverAnimated:YES];

} else {

    // create an imagePicker

    UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];

    imagePicker.delegate = self;
    imagePicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;

    imagePicker.allowsEditing = YES;


    // create an PopoverController
    popoverController = [[UIPopoverController alloc]
                         initWithContentViewController:imagePicker];



    popoverController.delegate = self;


    UIView *popView = [[UIView alloc]initWithFrame:CGRectMake(0, 0, 500, 500)];
    [self.view addSubview:popView];




    [popoverController presentPopoverFromRect:CGRectMake(100,200, 565, 545)
                                       inView:self.view
                     permittedArrowDirections:0
                                     animated:YES];
}

希望对你有帮助

于 2013-06-24T11:45:50.700 回答