nativeJs 实现原生定位

怎么实现代理的方法呢 ？
有没有使用nativeJS 调用iOS原生定位的demo可以参考一下
写了一半不会写了

                 mui.plusReady(function() {  
                var self = plus.ios.currentWebview();  

                var CLLocationManager = plus.ios.import("CLLocationManager");  
                if(!CLLocationManager) {  
                    console.log("CLLocationManager为空")  
                } else {  
                    console.log("CLLocationManager:" + CLLocationManager);  
                }  

                var manager = new CLLocationManager();  
                if(!manager) {  
                    console.log("manager为空");  
                } else {  
                    console.log("manager:" + manager);  
                }  
                manager.desiredAccuracy = "kCLLocationAccuracyBest";  
                manager.distanceFilter = 10;  
                manager.delegate = self;  
                manager.startUpdatingLocation();  

                console.log("end");  
                //plus.invoke(manager,"startUpdatingLocation");  
                //实现代理方法  
//              plus.ios.implements("manage": { "locationManager" })  

            });**