一、 创建UIWebView
// 创建一个webView
UIWebView *webView = [[UIWebView alloc] initWithFrame:CGRectMake(0, 0, SCREEN_WIDTH, SCREEN_HEIGHT)];
webView.backgroundColor = [UIColor whiteColor];
webView.opaque = NO;
webView.delegate = self;
webView.scalesPageToFit = YES; // 页面大小适应屏幕
[self.view addSubview:webView];
self.webView = webView;
二、加载web链接
NSURL *url = [NSURL URLWithString:@"https://www.baidu.com"];
NSURLRequest *request = [NSURLRequest requestWithURL:url];
[self.webView loadRequest:request];
三、在webView代理方法webViewDidFinishLoad页面加载完成的时候，截图
- (void)webViewDidFinishLoad:(UIWebView *)webView
{
UIScrollView *scroll = self.webView.subviews.firstObject;
scroll.frame = scroll.superview.frame;
CGRect frm = scroll.frame;
frm.size.height = _webView.scrollView.contentSize.height;
scroll.frame = frm;
[scroll.superview layoutIfNeeded];
// 执行截图
[self screenView:scroll];
}
四、截图方法
/// 截图
- (void)screenView:(UIScrollView *)view
{
// 设置截图大小
UIGraphicsBeginImageContextWithOptions(CGSizeMake(SCREEN_WIDTH,view.frame.size.height), YES, 0);
[view.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
CGImageRef imageRef = viewImage.CGImage;
UIImage *sendImage = [[UIImage alloc] initWithCGImage:imageRef];
NSLog(@"sendImage==%@",sendImage);
//保存图片到照片库 （iOS10 以上记得在info.plist添加相册访问权限，否则可能崩溃）
UIImageWriteToSavedPhotosAlbum(sendImage, nil, nil, nil);
}
五、 按Home键，到手机系统相册查看截图。完成。
