OGeek|极客世界-中国程序员成长平台

标题: ios - 获取当前位置而不是缓存 ios [打印本页]

---

作者: 菜鸟教程小白    时间: 2022-12-11 19:16
标题: ios - 获取当前位置而不是缓存 ios

我搜索了很多但没有得到任何满意的答案，我有一个场景，我根据用户的当前位置显示卖家列表。我第一次得到一个位置，然后当我尝试获取位置时运行我的应用程序时，我正在获取缓存位置数据。我确实在每 24 小时后尝试了一段时间，但仍然获得了我当前位置也被更改的缓存位置。以下是我用作引用的代码。请指教。

头文件中定义的属性

@property (nonatomic,retain) CLLocationManager *locationManager;

- (void)startSingleLocationRequest
{       
    self.locationManager = [[CLLocationManager alloc] init];
    self.locationManager.delegate = self;
    self.locationManager.distanceFilter = kCLDistanceFilterNone;
    self.locationManager.desiredAccuracy = kCLLocationAccuracyNearestTenMeters;

    [self.locationManager startUpdatingLocation];
    [self.locationManager requestWhenInUseAuthorization];


}

#pragma mark --didUpdateLocations
-(void)locationManagerCLLocationManager *)manager didUpdateLocationsNSArray<CLLocation *> *)locations{



    self.latitudeValue =  locations.lastObject.coordinate.latitude;
    self.longitudeValue =  locations.lastObject.coordinate.longitude;
// location set for simulation to UK
    if(self.latitudeValue != 51.509979 && self.longitudeValue != -0.133700){
         [MBProgressHUD hideHUDForView:self.outletSearchNearBy animated:YES];
           [self.locationManager stopUpdatingLocation];
        abc *slv =[self.storyboard instantiateViewControllerWithIdentifier"abc"];
        slv.receivedLatitudeValue = self.latitudeValue;
        slv.receivedLongitudeValue = self.longitudeValue;

        [self.navigationController pushViewController:slv animated:YES];
    }
    else{}

}

---

Best Answer-推荐答案

你可以这样做，

-(void)locationManagerCLLocationManager *)manager didUpdateLocationsNSArray *)locations{

for(int i=0;i<locations.count;i++){
    CLLocation * newLocation = [locations objectAtIndex:i];
    CLLocationCoordinate2D theLocation = newLocation.coordinate;
    CLLocationAccuracy theAccuracy = newLocation.horizontalAccuracy;

    NSTimeInterval locationAge = -[newLocation.timestamp timeIntervalSinceNow];

    if (locationAge > 5.0)
    {
        continue;
    }



       // do your all stuff here and then

       break;

    }


}

如果您的位置年龄超过 5 秒，您的代码将不会执行。您可以决定位置年龄是 10 秒还是 20 秒!

更新:

只需替换您的属性(property)声明

 @property (nonatomic,retain) CLLocationManager *locationManager;

与

 @property (nonatomic,strong) CLLocationManager *locationManager;

或

只需将其声明为实例变量，

 CLLocationManager *locationManager;

并从它的每个实例中删除 self!

第二件事，

你应该先做，

  [self.locationManager requestWhenInUseAuthorization];

然后开始更新位置，

  [self.locationManager startUpdatingLocation];

关于ios - 获取当前位置而不是缓存 ios，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/47261066/

---

欢迎光临 OGeek|极客世界-中国程序员成长平台 (https://ogeek.cn/)

Powered by Discuz! X3.4