iPhone imageview打印屏幕 - 从imageview创建新图像

3 回答

• 1

  UIGraphicsBeginImageContext(<specify your size here as CGRect>);
  [<yourImageView or view you want to convert in image>.layer renderInContext:UIGraphicsGetCurrentContext()];
  UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();
          UIGraphicsEndImageContext();
  

  输出 viewImage . 如你想要一个黑色边框所以你可以有一个这样的逻辑，你在一个UIView上添加 imageView ， blackBackroundColor 为黑色（请记住这个视图's frame should be greater than your imageView'的框架，每边有一些边距，这样你就可以拥有你的边框）.... . 现在 [<yourView>.layer renderInContext:UIGraphicsGetCurrentContext()]; 使用这种方法 .

  回复于 2024-04-19T22:24:38+08:00
• 1

  UIGraphicsBeginImageContextWithOptions(CGSizeMake(320, 480), NO, 0.0);
      CGContextRef context = UIGraphicsGetCurrentContext();
      [self.view.layer renderInContext:context];
      yourImageViewToStoreCaptured = UIGraphicsGetImageFromCurrentImageContext();
      UIGraphicsEndImageContext();
  

  希望这可以帮助 .

  回复于 2024-04-19T22:24:38+08:00
• 5

  -(IBAction)saveViewToPhotoLibrary:(id)sender 
  {
      CGRect screenRect = [[UIScreen mainScreen] bounds];
      UIGraphicsBeginImageContext(screenRect.size);
  
      CGContextRef ctx = UIGraphicsGetCurrentContext();
      [[UIColor blackColor] set];
      CGContextFillRect(ctx, screenRect);
  
      [self.view.layer renderInContext:ctx];
  
      UIImage *screenImage = UIGraphicsGetImageFromCurrentImageContext();
      UIImageWriteToSavedPhotosAlbum(screenImage,nil,nil,nil);                                         
      //fill cordinat in place of nil if u want only image comes and not button......ok thanks vijay// 
      UIGraphicsEndImageContext();    
  }
  

  回复于 2024-04-19T22:24:38+08:00