IOS UIWebView:如何向DOM事件添加监听器？

是的,您可以使用精心设计的url和UIWebViewDelegate方法执行此操作.

首先,要在按钮标记上添加事件监听器,您应该像下面一样执行javascript(在加载页面之后)

// In the UIWebViewDelegate
- (void)webViewDidFinishLoad:(UIWebView *)webView {
    if (/* when the loaded url is the target */) {
        NSString *js = @"document.getElementById('button').click = function() { window.location = 'my-protocol://dummmy.com/maybe/some/data';}";
        [webView stringByEvaluatingJavaScriptFromString: js];
    }
}

我们在按钮上绑定一个click事件,当它被单击时,它将触发对webView的请求.

接下来我们要做的是拦截请求并在ObjC中做你想做的事.

// In the UIWebViewDelegate
- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType {
    if (/* when the url of the request is the crafted url */) {
        // call your objc method...
    }
}