Objective-C 通过Webview 与 JS互调

一 objective-c调用js

 NSString *currentURL = [webView stringByEvaluatingJavaScriptFromString:@"document.location.href"];
 //注: webView是UIWebView实例

 

二 js调用objective-c

1.obj-c部分

 - (void)viewDidLoad {
     [super viewDidLoad];
     self.myWebView.delegate=self;
 }
 //-------------------------------------------------
 - (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType
 {
     //此url解析规则自己定义
     NSString* rurl=[[request URL] absoluteString];
     if ([rurl hasPrefix:@"protocol://"]) {
         UIAlertView* alert=[[UIAlertView alloc]initWithTitle:@"Called by JavaScript"
                                                      message:@"You've called iPhone provided control from javascript!!" delegate:self cancelButtonTitle:@"Cancel" otherButtonTitles:nil];
         [alert show];
         [alert release];
         return false;
     }

     return true;
 }

2. js部分

 function sendCommand(cmd,param){
     var url="protocol://"+cmd+":"+param;
     document.location = url;
 }

3.html部分

 <input type="button" value="call obj-c" onClick="sendCommand('act','param');" />