计算 webView 显示内容后实际高度

Posted 2020-06-11

两种方法，方法1可以得到内容的实际高度，方法2得到了将内容显示完整后的 webView 的尺寸（包含 UIEdgeInsets）

- (void)webViewDidFinishLoad:(UIWebView *)wb

{

    //方法1

    CGFloat documentWidth = [[wb stringByEvaluatingjavascriptFromString:@"document.getElementById(‘content‘).offsetWidth"] floatValue];

    CGFloat documentHeight = [[wb stringByEvaluatingJavaScriptFromString:@"document.getElementById(\"content\").offsetHeight;"] floatValue];

    NSLog(@"documentSize = {%f, %f}", documentWidth, documentHeight);

    //方法2

    CGRect frame = wb.frame;

    frame.size.width = 768;

    frame.size.height = 1;

    //    wb.scrollView.scrollEnabled = NO;

    wb.frame = frame;

    frame.size.height = wb.scrollView.contentSize.height;

    NSLog(@"frame = %@", [NSValue valueWithCGRect:frame]);

    wb.frame = frame;

}