转载自：http://m.open-open.com/m/code/view/1420469506375
1.普通界面
/** *截图功能 */ -(void)screenShot{ UIGraphicsBeginImageContextWithOptions(CGSizeMake(640, 960), YES, 0); //设置截屏大小 [[self.view layer] renderInContext:UIGraphicsGetCurrentContext()]; UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); CGImageRef imageRef = viewImage.CGImage; CGRect rect = CGRectMake(0, 0, 641, SCREEN_HEIGHT + 300);//这里可以设置想要截图的区域 CGImageRef imageRefRect =CGImageCreateWithImageInRect(imageRef, rect); UIImage *sendImage = [[UIImage alloc] initWithCGImage:imageRefRect]; //以下为图片保存代码 UIImageWriteToSavedPhotosAlbum(sendImage, nil, nil, nil);//保存图片到照片库 NSData *imageViewData = UIImagePNGRepresentation(sendImage); NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDirectory = [paths objectAtIndex:0]; NSString *pictureName= @"screenShow.png"; NSString *savedImagePath = [documentsDirectory stringByAppendingPathComponent:pictureName]; [imageViewData writeToFile:savedImagePath atomically:YES];//保存照片到沙盒目录 CGImageRelease(imageRefRect); //从手机本地加载图片 UIImage *bgImage2 = [[UIImage alloc]initWithContentsOfFile:savedImagePath]; }2.UIScrollView截屏（一屏无法显示完整）
/** *截图 */ - (void)screenShot{ UIImage* image = nil; UIGraphicsBeginImageContext(m_scrollView.contentSize); { CGPoint savedContentOffset = m_scrollView.contentOffset; CGRect savedFrame = m_scrollView.frame; m_scrollView.contentOffset = CGPointZero; m_scrollView.frame = CGRectMake(0, 0, m_scrollView.contentSize.width, m_scrollView.contentSize.height); [m_scrollView.layer renderInContext: UIGraphicsGetCurrentContext()]; image = UIGraphicsGetImageFromCurrentImageContext(); m_scrollView.contentOffset = savedContentOffset; m_scrollView.frame = savedFrame; } UIGraphicsEndImageContext(); if (image != nil) { NSLog(@"截图成功!"); } } 截全屏的代码： - (UIImage*)screenView:(UIView *)view{ CGRect rect = view.frame; UIGraphicsBeginImageContext(rect.size); CGContextRef context = UIGraphicsGetCurrentContext(); [view.layer renderInContext:context]; UIImage *img = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); return img;}如果需要导航栏也截取的话 把[view.layer renderInContext:context]改成[self.navigationController.view.layer renderInContext:context]转载于:https://www.cnblogs.com/CodingMann/p/5231527.html
