ios - 如何动态改变webView的高度？

Question

我现在用webView来展示新闻，新闻下面我打算放一些按钮。所以我需要得到webView的高度，以便在全部下载后根据webView的高度来改变按钮的位置。在其他话说，如何动态改变webView的高度？

Answer 1

尝试这个

    - (void)webViewDidFinishLoad:(UIWebView *)webView
    {
        NSString *string = [_webView stringByEvaluatingJavaScriptFromString:@"document.getElementById(\"body\").offsetHeight;"];
        CGFloat height = [string floatValue] + 8;
        CGRect frame = [_webView frame];
        frame.size.height = height;
        [_webView setFrame:frame];

        if ([[self delegate] respondsToSelector:@selector(webViewController:webViewDidResize:)])
        {
            [[self delegate] webViewController:self webViewDidResize:frame.size];
        }
    }

Answer 2

在委托方法 webViewDidFinishLoad 中执行此操作：

- (void)webViewDidFinishLoad:(UIWebView *)aWebView
{
    CGFloat height = [[aWebView stringByEvaluatingJavaScriptFromString:@"document.height"] floatValue];
    CGFloat width = [[aWebView stringByEvaluatingJavaScriptFromString:@"document.width"] floatValue];
    aWebView.frame = CGRectMake(aWebView.frame.origin.x,aWebView.frame.origin.y,width, height);
}

Answer 3

webView 具有sizeThatFits:在将 webView 添加到视图层次结构并完成加载 html 后返回内容大小的方法。

但是，如果没有警告，这是行不通的。在调用拟合大小方法之前，您需要将 webview 的框架设置为较低的值。

例如：如果您有固定宽度和可变高度

//Set a very low height
CGRect webViewFrame = self.webView.frame;
webViewFrame.size.height = 5.0f;
self.webView.frame = webViewFrame;
//Re calculate the size that fits
CGSize size = [self.webView sizeThatFits:webViewFrame.size];
self.webViewFrame.size = size;
self.webView.frame = webViewFrame;

PS：我要感谢原创作品。我仍在搜索

Answer 4

According to your device type like iPhone 4 or iPhone 5 you can set your webview
The web view has finished loading.
    - (void)webViewDidFinishLoad:(UIWebView *)webView {

        [DejalActivityView removeView];

        if ([objSpineCustomProtocol windowHeight] == 480) {

            termsWebView.frame = CGRectMake(termsWebView.frame.origin.x
                                            ,termsWebView.frame.origin.y
                                            ,termsWebView.frame.size.width
                                            ,350);

        }

    }// End of Method webViewDidFinishLoad

//VKJ