js 传值给 IOS

定义js方法

function callOC(func,param){
        var iframe = document.createElement("iframe");
        var url= "myapp:" + "&func=" + func;
        for(var i in param)
        {
            url = url + "&" + i + "=" + param[i];
        }
        iframe.src = url;
        iframe.style.display = 'none';
        document.body.appendChild(iframe);
        iframe.parentNode.removeChild(iframe);
        iframe = null;
}

调用js方法

 <a  onclick="callOC('prodId',{'prodId':${pro.prodId}})" ><img class="scrollLoading" src='<ls:photo item="${pro.img}" />'></a>

 

OC接收参数

- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType {
 
    NSString *requestString = [[[request URL]  absoluteString] stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding ];
    
    if ([requestString hasPrefix:@"myapp:"]) {
        NSLog(@"requestString:%@",requestString);
        //如果是自己定义的协议, 再截取协议中的方法和参数, 判断无误后在这里手动调用oc方法
        NSMutableDictionary *param = [self queryStringToDictionary:requestString];
        NSLog(@"get param:%@",[param description]);
 
        NSString *func = [param objectForKey:@"func"];
        
        if([func isEqualToString:@"callFunc"])
        {
            [self testFunc:[param objectForKey:@"first"] withParam2:[param objectForKey:@"second"]  andParam3:[param objectForKey:@"third"] ];
            
        }
/*
 * 方法的返回值是BOOL值。
 * 返回YES：表示让浏览器执行默认操作，比如某个a链接跳转
 * 返回NO：表示不执行浏览器的默认操作，这里因为通过url协议来判断js执行native的操作，肯定不是浏览器默认操作，故返回NO
 * 
 */
        return NO;
    }
    return YES;
}

- (NSMutableDictionary*)queryStringToDictionary:(NSString*)string {
    NSMutableArray *elements = (NSMutableArray*)[string componentsSeparatedByString:@"&"];
    NSMutableDictionary *retval = [NSMutableDictionary dictionaryWithCapacity:[elements count]];
    for(NSString *e in elements) {
        NSArray *pair = [e componentsSeparatedByString:@"="];
        [retval setObject:[pair objectAtIndex:1]?:@"" forKey:[pair objectAtIndex:0]?@:"nokey"];
    }
    return retval;
}

具体引自  http://www.skyfox.org/javascript-ios-navive-message.html

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