一、 創(chuàng)建UIWebView

// 創(chuàng)建一個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; // 頁面大小適應(yīng)屏幕
[self.view addSubview:webView];
self.webView = webView;

二、加載web鏈接

 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頁面加載完成的時候，截圖

- (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];
        // 執(zhí)行截圖
        [self screenView:scroll];
}

四、截圖方法

/// 截圖
- (void)screenView:(UIScrollView *)view
{
    // 設(shè)置截圖大小
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);
     //保存圖片到照片庫 （iOS10 以上記得在info.plist添加相冊訪問權(quán)限，否則可能崩潰）
   UIImageWriteToSavedPhotosAlbum(sendImage, nil, nil, nil);
}

五、 按Home鍵，到手機系統(tǒng)相冊查看截圖。完成。