ios 使用 CLLocationCoordinate2D 获取当前位置
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Get current location using CLLocationCoordinate2D
提问by iOSDev
I am trying to get current location of user using CLLocationCoordinate2D. I want the values in the format like
我正在尝试使用 CLLocationCoordinate2D 获取用户的当前位置。我想要像这样格式的值
CLLocationCoordinate2D start = {-28.078694,153.382844 };
CLLocationCoordinate2D 开始 = {-28.078694,153.382844 };
So that I can use them like following:
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];
I used
我用了
CLLocation *location = [[CLLocation alloc]init ];
CLLocationDegrees currentLatitude = location.coordinate.latitude;
CLLocationDegrees currentLongitude = location.coordinate.longitude;
to get current lat & long.
获取当前经纬度。
But I am getting 0.000 for both when I try to test. I am testing on iPhone 4s.
但是当我尝试测试时，两者都得到 0.000。我正在 iPhone 4s 上进行测试。
If there is any sample code, it will be great.
如果有任何示例代码，那就太好了。
回答by Mudit Bajpai
Add CoreLocation framework first and then use the following code...and your viewController must implement CLLocationManagerDelegate
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);
}
回答by Vibhooti
in AppDelegate.h declare following variable. and implement
在 AppDelegate.h 中声明以下变量。并实施
CLLocationManagerDelegate delegate.
CLLocationManager *locationManager;
CLLocation *currentLocation;
in AppDelegate.h.m file write following code.
在 AppDelegate.hm 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;
}
回答by Rams
CLLocationCoordinate2D location = [[[mapview userLocation] location] coordinate];
NSLog(@"Location found from Map: %f %f",location.latitude,location.longitude);
and also refer the link(without mapview0
并参考链接（没有 mapview0
https://developer.apple.com/library/ios/#samplecode/LocateMe/Introduction/Intro.html
https://developer.apple.com/library/ios/#samplecode/LocateMe/Introduction/Intro.html
回答by Aleksejs Mjaliks
You need to use CLLocationManagerto get a user's location. CLLocationis only a class of objects used to represent locations, it can't get user location by it self.
您需要使用CLLocationManager来获取用户的位置。CLLocation只是一类用于表示位置的对象，它无法自行获取用户位置。
For more details and example, please follow to Apple docs on Location Awareness Programming.
有关更多详细信息和示例，请参阅 Apple 文档位置感知编程。
回答by Manish Agrawal
use location manager to get lat and long, follow this tutorial for sample code http://www.edumobile.org/iphone/miscellaneous/how-to-get-current-latitude-and-longitude-in-iphone/
使用位置管理器获取经纬度，请按照本教程获取示例代码http://www.edumobile.org/iphone/miscellaneous/how-to-get-current-latitude-and-longitude-in-iphone/
回答by dominic
-(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]];
}
