从uiwebview以编程方式获取所选元素？

问题描述

目前我正在并在我的网页浏览中显示。网页显示正确。

Currently I am taking this sample website and showing in my webview. The webpage is displaying correctly.

现在我试图找出用户点击uiwebview后选择了哪些数据。

Now I am trying to figure out which data is selected once the user has tapped on the uiwebview.

为此，我可以使用 UITapGestureRecognizer 获得点击CGPoint。

For this I am able to get the CGPoint for the tap by using UITapGestureRecognizer.

-(void)singleTap:(UIGestureRecognizer *)gestureRecognizer
{

    CGPoint touchPoint = [gestureRecognizer locationInView:myWebView];

    NSString *js = [NSString stringWithFormat:@"document.elementFromPoint(%f, %f).toString()", touchPoint.x, touchPoint.y];

    NSString * tagName = [myWebView stringByEvaluatingJavaScriptFromString:js];

    NSLog(@"Selected Name: %@",tagName);

}

// In log it is displaying [object SVGPathElement]

一旦用户选择第一张图中的垂直条
（例如1994/1995/1996），我想得到确切的数据。

I want to get the exact data once user selects the vertical bar in first graph(E.g. 1994/1995/1996).

怎么做？

推荐答案

你没有指明什么是不适合你...无论如何，a几个建议：

You don't specify what is that is not working for you... anyway, a couple of suggestions:

1. 在您的点击处理程序中尝试使用以下js：

1. try with the following js in your tap handler:

NSString *js = [NSString stringWithFormat:@"document.elementFromPoint(%f, %f).innerHTML", touchPoint.x, touchPoint.y];

创建点击手势处理程序时，为其指定一个委托（它可以是您的控制器） ）：

when creating your tap gesture handler, specify a delegate for it (it can be your controller):

tap1.delegate = self;

在您的控制器（或Web视图委托）中，定义以下委托方法：

in your controller (or web view delegate), define the following delegate method:

- (BOOL)gestureRecognizer:(UIGestureRecognizer*)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:    (UIGestureRecognizer*)otherGestureRecognizer {
    return YES;
}

如果您使用的是iOS 5，请查看。

通过这样做，我能够得到确切的结果所选对象的HTML值。

By doing like this, I am able to get the exact HTML value for the selected object.

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