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JS与iOS之间的通信

2015-06-02 10:07 651 查看

原文地址：http://my.oschina.net/u/857043/blog/88704

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>

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