Objective-c与js相互调用

 

原文地址：http://blog.csdn.net/ikmb/article/details/6716831

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');" />