从uiwebview以编程方式获取所选元素？ [英] Getting selected elements programatically from uiwebview?
问题描述
目前我正在此示例网站和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]
一旦用户在第一张图中选择垂直条，我想得到确切的数据
（例如1994/1995/1996）。
I want to get the exact data once user selects the vertical bar in first graph (E.g. 1994/1995/1996).
任何人都可以解释如何做到这一点吗？
Can any one explain how to do this?
推荐答案
你没有指定哪些不适合你..无论如何，有几点建议：
You don't specify what is that is not working for you... anyway, a couple of suggestions:
-
尝试点击处理程序中的以下js：
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;
，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，请查看这篇文章关于中的小故障elementFromPoint 。
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.
这篇关于从uiwebview以编程方式获取所选元素？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
