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。我想要的格式值如下：

CLLocationCoordinate2D start = {-28.078694,153.382844};

所以，我可以使用他们喜欢以下内容：

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

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

获取当前纬度&长。

但是，当我尝试测试时，我得到了0.000。我正在测试iPhone 4s。

如果有任何示例代码，它会很好。

Answer 1

第一添加CoreLocation框架，然后使用下面的代码...和你的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

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

，并参考链接（不mapview0

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

Answer 3

您需要使用CLLocationManager获取用户的位置。CLLocation只是一个类的对象来表示的地方，也可以”牛逼通过其自身获得用户的位置。

有关详细信息和示例，请按照苹果的文档上Location Awareness Programming。

Answer 4

使用位置管理器来获得纬度和长，按照这个教程的示例代码http://www.edumobile.org/iphone/miscellaneous/how-to-get-current-latitude-and-longitude-in-iphone/

Answer 5

中的AppDelegate .h声明下面的变量。并执行

CLLocationManagerDelegate delegate. 

CLLocationManager *locationManager; 
CLLocation *currentLocation; 

在AppDelegate.h.m文件中写入以下代码。

- (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 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]]; 
}