How do I handle return key on an iOS web view native keyboard?

问题

In my iOS app, I have a UIWebView with text fields . I'd like to respond to the Return key being tapped. How do I do that?

Can I somehow get access to the UITextField so I can implement UITextFieldDelegate method textFieldShouldReturn? Or is there some other way to accomplish this?

回答1:

You need to do some JavaScript tricks for this.

In your HTML document, bind a keyup event callback for your text input control, (Last time I checked, somehow UIWebView doesn't fire keypress event for return key, so keyup event is your best alternative)

In this callback, let the web view goto a custom URL scheme. e.g below:

var input = document.getElementById('textInput');
input.onkeyup = function(){window.location = 'callback://keyup'};

Then you can handle this URL scheme in you UIWebView's delegate

- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType
{
    if ([request.URL.scheme isEqualToString:@"callback"]) {
        // Do what you want

        return NO;
    }

    return YES;
}

回答2:

uiwebview can not can uitextfieldDelegate . try to read Apple document

来源：https://stackoverflow.com/questions/16086040/how-do-i-handle-return-key-on-an-ios-web-view-native-keyboard