Method/Step Method 1: Use the delegate method of webview-(bool) WebView: (UIWebView *) WebView ShouldstartloadwithRequest: (NSURLRequest *) Request Navigation Type: (UIWebView Navigation Type) navigation type; In the above function, the parameters passed in js are analyzed by intercepting NSURLRequest, and the defined method is called according to the parameters. But now let's introduce another method. Method 2: We use the javascriptCore.framework library. First, we create a UIWebView with the following code: # import "webview.h" # import.