JS与iOS之间的通信

来源：互联网发布：淘宝网和易趣网比较编辑：程序博客网时间：2024/05/13 05:21

Ps：http://my.oschina.net/u/857043/blog/88704

JS与iOS之间的通信

JS与iOS之间的通信，主要运用两个方法：(PhoneGap框架也是基于此原理)

1、UIWebView的 stringByEvaluatingJavaScriptFromString方法

2、UIWebViewDelegate的

- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType方法

示例：

上部分是一个UIWebView，实现UIWebViewDelegate

[plain] view plain copy print ?

- (void)viewDidLoad
{
[super viewDidLoad];
NSString *path = [[NSBundle mainBundle] pathForResource:@"jm/info" ofType:@"html"];
NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL fileURLWithPath:path]];
[self.webView loadRequest:request];
}

- (void)viewDidLoad{    [super viewDidLoad];    NSString *path = [[NSBundle mainBundle] pathForResource:@"jm/info" ofType:@"html"];    NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL fileURLWithPath:path]];    [self.webView loadRequest:request];}

[plain] view plain copy print ?

#pragma mark - UIWebViewDelegate
- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType
{
if([request.mainDocumentURL.relativePath isEqualToString:@"/getInfo/name"])
{
NSString *info = [[UIDevice currentDevice] name];
NSString *js = [NSString stringWithFormat:@"showInfo(\"name\",\"%@\")",info];
[self.webView stringByEvaluatingJavaScriptFromString:js];
return false;
}
if([request.mainDocumentURL.relativePath isEqualToString:@"/getInfo/systemVersion"])
{
NSString *info = [[UIDevice currentDevice] systemVersion];
NSString *js = [NSString stringWithFormat:@"showInfo(\"systemVersion\",\"%@\")",info];
[self.webView stringByEvaluatingJavaScriptFromString:js];
return false;
}
return true;
}

#pragma mark - UIWebViewDelegate- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType{    if([request.mainDocumentURL.relativePath isEqualToString:@"/getInfo/name"])    {        NSString *info = [[UIDevice currentDevice] name];        NSString *js = [NSString stringWithFormat:@"showInfo(\"name\",\"%@\")",info];        [self.webView stringByEvaluatingJavaScriptFromString:js];        return false;    }    if([request.mainDocumentURL.relativePath isEqualToString:@"/getInfo/systemVersion"])    {        NSString *info = [[UIDevice currentDevice] systemVersion];        NSString *js = [NSString stringWithFormat:@"showInfo(\"systemVersion\",\"%@\")",info];        [self.webView stringByEvaluatingJavaScriptFromString:js];        return false;    }    return true;}

JS代码：

[html] view plain copy print ?

<!DOCTYPE html>
<html>
<head>
<title>city</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="jquery.mobile-1.0.css"/>
<script type="text/javascript" src="jquery.js"></script>
<script type="text/javascript" src="jquery.mobile-1.0.js"></script>
<script>
function getInfo(name)
{
window.location = "/getInfo/"+name;
}
function showInfo(id,info)
{
$("p#"+id).html(info);
}
</script>
</head>
<body>
<div data-role="page">
<div data-role="content">
<h2>Divice Info</h2>
<div data-role="collapsible-set" data-theme="c" data-content-theme="d">
<div data-role="collapsible">
<h3 onclick="getInfo('name')">name</h3>
<p id="name"></p>
</div>
<div data-role="collapsible">
<h3 onclick="getInfo('systemVersion')">systemVersion</h3>
<p id="systemVersion"></p>
</div>
</div>
</div>
</div>
</body>
</html>

0 0