uniapp 打开[ios/安卓]GPS定位权限

如何检测GPS有没有开启我是写在高德地图API接口中fail函数里的

openGps(){
    let system = uni.getSystemInfoSync();// 获取系统信息
    if (system.platform === 'android') { // 判断平台
        var context = plus.android.importClass("android.content.Context");
	var locationManager = plus.android.importClass("android.location.LocationManager");
	var main = plus.android.runtimeMainActivity();
	var mainSvr = main.getSystemService(context.LOCATION_SERVICE);
	if (!mainSvr.isProviderEnabled(locationManager.GPS_PROVIDER)) {
	    uni.showModal({
	        title: '提示',
		content: '请打开定位服务功能',
		showCancel: false, // 不显示取消按钮
		success() {
		    var Intent = plus.android.importClass('android.content.Intent');
		    var Settings = plus.android.importClass('android.provider.Settings');
		    var intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS); 
		    main.startActivity(intent); // 打开系统设置GPS服务页面

	        }
	    });	
        }
    }else if(system.platform === 'ios'){
        var cllocationManger = plus.ios.import("CLLocationManager");
	var enable = cllocationManger.locationServicesEnabled();
	var status = cllocationManger.authorizationStatus();
	plus.ios.deleteObject(cllocationManger);
	console.log("手机系统的定位没有打开");
	uni.showModal({
            title: '提示',
	    content: '请打开定位服务功能',
	    showCancel: false, // 不显示取消按钮
	    success() {
	        var UIApplication = plus.ios.import("UIApplication");
		var application2 = UIApplication.sharedApplication();
		var NSURL2 = plus.ios.import("NSURL");				
		var setting2 = NSURL2.URLWithString("App-Prefs:root=Privacy&path=LOCATION");
		application2.openURL(setting2);
		plus.ios.deleteObject(setting2);
		plus.ios.deleteObject(NSURL2);
        	plus.ios.deleteObject(application2);
	    }
       });
     }
},