使用CLLocationCoordinate2D获取当前位置

Question

我正在尝试使用CLLocationCoordinate2D获取用户的当前位置。 我想要像这样的格式的值

CLLocationCoordinate2D start = {-28.078694,153.382844};

这样我就可以像下面这样使用它们：

 NSString *urlAddress = [NSString 
       stringWithFormat:@"http://maps.google.com/?saddr=%1.6f,%1.6f&daddr=%1.6f,%1.6f",  
       start.latitude, start.longitude, 
       destination.latitude, destination.longitude];  

我用了

CLLocation *location = [[CLLocation alloc]init ];
CLLocationDegrees currentLatitude = location.coordinate.latitude;
CLLocationDegrees currentLongitude = location.coordinate.longitude;

得到当前的经纬度。

但是当我尝试测试时，两者的总和都是0.000。 我正在iPhone 4s上进行测试。

如果有任何示例代码，那就太好了。

Answer 1

首先添加CoreLocation框架，然后使用以下代码...，并且您的viewController必须实现CLLocationManagerDelegate

-(void)findCurrentLocation
{

    CLLocationManager *locationManager = [[CLLocationManager alloc] init];
    if ([locationManager locationServicesEnabled])
    {
        locationManager.delegate = self; 
        locationManager.desiredAccuracy = kCLLocationAccuracyBest; 
        locationManager.distanceFilter = kCLDistanceFilterNone; 
        [locationManager startUpdatingLocation];
    }


    CLLocation *location = [locationManager location];
    CLLocationCoordinate2D coordinate = [location coordinate];

    NSString *str=[[NSString alloc] initWithFormat:@" latitude:%f longitude:%f",coordinate.latitude,coordinate.longitude];
    NSLog(@"%@",str);


}

Answer 2

在AppDelegate.h中声明以下变量。 并实施

CLLocationManagerDelegate delegate.

CLLocationManager *locationManager;
CLLocation *currentLocation;

在AppDelegate.hm文件中，编写以下代码。

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {       

    self.locationManager = [[CLLocationManager alloc] init];
    locationManager.delegate = self;
    locationManager.desiredAccuracy = kCLLocationAccuracyBest;
    [locationManager startUpdatingLocation];
}

- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation {

    self.currentLocation = newLocation;
    self.currentLat =  newLocation.coordinate.latitude; 
    self.currentLong =  newLocation.coordinate.longitude; 
}

Answer 3

CLLocationCoordinate2D location = [[[mapview userLocation] location] coordinate];  
NSLog(@"Location found from Map: %f %f",location.latitude,location.longitude);

并参考链接（没有mapview0

https://developer.apple.com/library/ios/#samplecode/LocateMe/Introduction/Intro.html

Answer 4

您需要使用CLLocationManager来获取用户的位置。 CLLocation只是用于表示位置的一类对象，它本身无法获取用户位置。

有关更多详细信息和示例，请遵循Apple文档上的位置感知编程 。

Answer 5

使用位置管理器来获取经度和纬度，请按照本教程中的示例代码http://www.edumobile.org/iphone/miscellaneous/how-to-get-current-latitude-and-longitude-in-iphone/

Answer 6

-(void)findCurrentLocation
{
    if ([CLLocationManager locationServicesEnabled])
    {
        CLLocationManager *locationManager = [[CLLocationManager alloc] init];
        locationManager.delegate = self;
        locationManager.desiredAccuracy = kCLLocationAccuracyBest;
        locationManager.distanceFilter = kCLDistanceFilterNone;
        [locationManager startUpdatingLocation];
    }
}

- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations {
    [self setLocation:[[manager location] coordinate]];
}