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!");
}
}
给指定view截屏
UIGraphicsBeginImageContextWithOptions(view.bounds.size, YES, 0.0);
[view.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *img = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();