附加带有邮件的图像文件的问题

Question

我正在尝试将视图捕获为图像，然后通过邮件附加该图像，但问题是捕获视图后图像周围出现白色边框！ ，这个问题只发生在 iPhone 5 设备上！这是我的代码：

Sharing.m

- (void)mailAttachmentWithImage:(UIView*)view openInView:(UIViewController*)viewCont {

    MFMailComposeViewController *controller = [[MFMailComposeViewController alloc] init];
    controller.mailComposeDelegate = self;

    UIView* captureView = view;
    captureView.backgroundColor = [UIColor clearColor];
    /* Capture the screen shoot at native resolution */
    UIGraphicsBeginImageContextWithOptions(captureView.bounds.size, NO, 0.0);
    [captureView.layer renderInContext:UIGraphicsGetCurrentContext()];
    UIImage * screenshot = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();

    /* Render the screen shot at custom resolution */
    CGRect cropRect = CGRectMake(0 ,0 ,1024 ,1024);
    UIGraphicsBeginImageContextWithOptions(cropRect.size, NO, 1.0f);
    [screenshot drawInRect:cropRect];
    UIImage * customScreenShot = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();

    NSData *myData = UIImagePNGRepresentation(customScreenShot);
    [controller addAttachmentData:myData mimeType:@"image/png" fileName:@"Image"];


    [viewCont presentViewController:controller animated:YES completion:nil];


}

ViewController.m

然后捕获视图：

- (IBAction)mail:(id)sender {


 [shareIt mailAttachmentWithImage:_captureView openInView:self];

}

Answer 1

您需要捕获Image-view而不是UIView的图像。你发布的答案不足以帮助其他人。作为我的轰鸣声代码，您可以使用Bellow代码捕获Image-view帧的图像： -

-(void)imageWithView:(UIView *)view
{
      CGRect rect = CGRectMake(imgview.frame.origin.x, imgview.frame.origin.y,imgview.frame.size.width, imgview.frame.size.height);

    UIGraphicsBeginImageContextWithOptions(self.view.frame.size, YES, 1.0);
    [self.view.layer renderInContext:UIGraphicsGetCurrentContext()];
    UIImage *screenshot = UIGraphicsGetImageFromCurrentImageContext();


   // CGRect rect = CGRectMake(0,0,10,10);
    CGImageRef imageRef = CGImageCreateWithImageInRect([screenshot CGImage], rect);
    UIImage *croppedScreenshot = [UIImage imageWithCGImage:imageRef];
    CGImageRelease(imageRef);


    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDirectory = [paths objectAtIndex:0];
    NSString *savedImagePath = [documentsDirectory stringByAppendingPathComponent:@"savedImage.png"];

    NSData *imageData = UIImagePNGRepresentation(croppedScreenshot);

   [controller addAttachmentData:imageData mimeType:@"image/png" fileName:@"Image"];
   [viewCont presentViewController:controller animated:YES completion:nil];


}

因此，此捕获的图像不包含边框，您可以将此图像无边框附加到电子邮件中。

Answer 2

问题解决了！因为我的视图大于目标图像大小!!!!