获取用户的经度/纬度时viewDidLoad [英] Getting Longitude/Latitude of the User When the viewDidLoad

问题描述

我的目的是在加载视图时获取用户的经度/纬度，并将值存储在两个变量中以便以后计算。我不需要跟踪用户位置并更新它，我只需要将他/她的坐标设置为。我的代码如下所示：

My purpose is to get the longitude/latitude of the user when the view is loaded and to store the values in two variables for later calculations. I don't need to track the user location and to update it, I simply need to get his/her coordinates once. My code looks like this:

- (void)viewDidLoad {
    [super viewDidLoad];
    // locationManager update as location
    locationManager = [[CLLocationManager alloc] init];
    locationManager.delegate = self; 
    locationManager.desiredAccuracy = kCLLocationAccuracyBest; 
    locationManager.distanceFilter = kCLDistanceFilterNone; 
    [locationManager startUpdatingLocation];
    CLLocation *location = [locationManager location];
    // Configure the new event with information from the location
    CLLocationCoordinate2D coordinate = [location coordinate];

    float longitude=coordinate.longitude;
    float latitude=coordinate.latitude;

    NSLog(@"dLongitude : %f",longitude);
    NSLog(@"dLatitude : %f", latitude); 
}

在控制台中我一直这样：

In the console i keep getting this:

dLongitude : 0.000000
dLatitude : 0.000000

你能帮助我吗？

推荐答案

一旦你需要制作<$ c来获取用户的位置$ c> locationManager 开始更新位置（您这样做）并实现管理员在检索位置时调用的委托方法 - 您无法立即从位置管理器获取位置。

To get user's location even once you need to make locationManager to start updating locations (you did that) and implement delegate method that manager calls when location is retrieved - you can't get location from location manager immediately.

如果您不想跟踪用户位置 - 只需在第一次获取位置后停止更新该委托方法中的位置（并在需要时存储它）将来）。

If you don't want to track user location - just stop updating locations in that delegate method after location was fetched for the 1st time (and store it if you need it in future).

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