javascript invoke object-c 2

最新推荐文章于 2025-10-06 06:23:06 发布

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本文介绍如何使用UIWebView实现Objective-C与JavaScript之间的通信。通过一个简单示例展示如何捕获并处理JavaScript发起的链接请求，重点讲解了delegate方法的使用。

// This delegate method is used to grab any links used to "talk back" to Objective-C code from the html/JavaScript

-(BOOL) webView:(UIWebView *)inWeb shouldStartLoadWithRequest:(NSURLRequest *)inRequest navigationType:(UIWebViewNavigationType)inType

{

// In the event we see our URL scheme pass by, we deal with it, otherwise we let other URL schemes pass by

// You may choose to handle other UIWebViewNavigationType values as your app requires

if (inType == UIWebViewNavigationTypeOther || inType == UIWebViewNavigationTypeLinkClicked) {

NSURL *URL = [inRequest URL];

NSString *scheme = [URL scheme];

if ([scheme isEqualToString:@"abc"]) {

// This is the point where we are communicated with - the resourceSpecifier contains anything after the

// abc: in the URL. We can parse it as needed. In this case we simple NSLog it.

NSLog(@"%@", [URL resourceSpecifier]);

// Let the webView know we handled it

return NO;

}

// Let the webView handle everything else

return YES;

}

<!DOCTYPE html>

<html>

<head>

<title>hello</title>

</head>

<body>

<h3>JavaScript-UIWebView</h3>

<p>A simple example showing how to communicate via UIWebView between Obj-C and JavaScript and back</p>

function doButton() {

a = '%inject%'; // This is replaced by text generated from our Obj-C code

if (confirm(a)) {

// When this is set, our UIWebView delegate is called in the Obj-C code

location.href = 'abc://test?param=cool&another=hot';

}

</script>

<a href="abc://well hello there!">Here is another link to try clicking - check the NSLog output</a>

<a href="http://zobcode.com">A normal link just to show they still work as expected</a>

</body>

</html>