how to intercept Button click inside UIWebview on IOS?

Question

I have a HTML form that has certain fields which i am opening inside a UIWebview. On click of a particular button i want to do a in app action.

The approach i\'m usi

Answer 1

This code:

<a class="yourButton" href="inapp://capture">Restart</a>

doesn't work for me.

I've added "inapp://capture" in my javascript code for event function

KeyboardInputManager.prototype.restart = function (event) {
  window.location.href = "inapp://capture";
  //other code
};

Also I use the UIWebViewDelegate and It works for iOS 8, 9.

Answer 2

For swift 4.2

Button code in HTML side:

<a class="catch-iOS" href="inapp://home">Продолжить покупки</a>

UIWebViewDelegate method:

func webView(_ webView: UIWebView, shouldStartLoadWith request: URLRequest, navigationType: UIWebView.NavigationType) -> Bool {
    if request.url?.scheme == "inapp" {
        if request.url?.host == "home" {
            // do something
        }
    }
    return true
}

Answer 3

You can do the following:

In your HTML

<a class="yourButton" href="inapp://capture">Button Text</a>

In your UIWebViewDelegate

- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType {
   if ([request.URL.scheme isEqualToString:@"inapp"]) {
      if ([request.URL.host isEqualToString:@"capture"]) {
         // do capture action
      }  
      return NO;
   }  
   return YES;
}

I added "capture" to your button's URL so that you could distinguish between several buttons that should trigger different actions (if you want to):