ipad将图片放到UIPopoverController中

Question

我的目标是让用户能从UIWebView抓取屏幕截图。然后将图片加载到UIPopoverController中。

在UIPopoverController中用户可剪裁并保存图片。

目前我实现了UIImage屏幕截图。然后UIPopoverController弹出，但是不能保存图片，好像是由于这句代码： imagePicker sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
应该怎么修改呢？

全部代码：

-(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;
}

Answer 1

http://www.cnblogs.com/ios-wmm/archive/2012/09/03/2668885.html