如何从iOS中的用户获取当前位置？
如何从iOS用户获取当前位置？
RedBlueThing的答案对我来说工作得很好。 以下是我如何做的一些示例代码。
头
#import <UIKit/UIKit.h> #import <CoreLocation/CoreLocation.h> @interface yourController : UIViewController <CLLocationManagerDelegate> { CLLocationManager *locationManager; } @end MainFile
在init方法中
locationManager = [[CLLocationManager alloc] init]; locationManager.delegate = self; locationManager.distanceFilter = kCLDistanceFilterNone; locationManager.desiredAccuracy = kCLLocationAccuracyBest; [locationManager startUpdatingLocation];
callback函数
- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation { NSLog(@"OldLocation %f %f", oldLocation.coordinate.latitude, oldLocation.coordinate.longitude); NSLog(@"NewLocation %f %f", newLocation.coordinate.latitude, newLocation.coordinate.longitude); }
iOS 6
在iOS 6中，委托函数已被弃用。 新代表是
- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations
因此要获得新的职位使用
[locations lastObject]
iOS 8
在iOS 8中，在开始更新位置之前，应该明确询问权限
locationManager = [[CLLocationManager alloc] init]; locationManager.delegate = self; locationManager.distanceFilter = kCLDistanceFilterNone; locationManager.desiredAccuracy = kCLLocationAccuracyBest; if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 8.0) [self.locationManager requestWhenInUseAuthorization]; [locationManager startUpdatingLocation];
您还必须将NSLocationAlwaysUsageDescription或NSLocationWhenInUseUsageDescription键的string添加到应用程序的Info.plist中。 否则，对startUpdatingLocation调用将被忽略，您的委托将不会收到任何callback。
最后当你在适当的地方读完地点电话stopUpdating位置。
[locationManager stopUpdatingLocation];
在iOS 6中，
- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation
已弃用。
改用下面的代码
- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations { CLLocation *location = [locations lastObject]; NSLog(@"lat%f - lon%f", location.coordinate.latitude, location.coordinate.longitude); }
对于iOS 6〜8，上述方法仍然是必要的，但是您必须处理授权。
_locationManager = [CLLocationManager new]; _locationManager.delegate = self; _locationManager.distanceFilter = kCLDistanceFilterNone; _locationManager.desiredAccuracy = kCLLocationAccuracyBest; if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 8.0 && [CLLocationManager authorizationStatus] != kCLAuthorizationStatusAuthorizedWhenInUse //[CLLocationManager authorizationStatus] != kCLAuthorizationStatusAuthorizedAlways ) { // Will open an confirm dialog to get user's approval [_locationManager requestWhenInUseAuthorization]; //[_locationManager requestAlwaysAuthorization]; } else { [_locationManager startUpdatingLocation]; //Will update location immediately }
这是处理用户授权的委托方法
#pragma mark - CLLocationManagerDelegate - (void)locationManager:(CLLocationManager*)manager didChangeAuthorizationStatus:(CLAuthorizationStatus)status { switch (status) { case kCLAuthorizationStatusNotDetermined: { NSLog(@"User still thinking.."); } break; case kCLAuthorizationStatusDenied: { NSLog(@"User hates you"); } break; case kCLAuthorizationStatusAuthorizedWhenInUse: case kCLAuthorizationStatusAuthorizedAlways: { [_locationManager startUpdatingLocation]; //Will update location immediately } break; default: break; } }
您可以使用CoreLocation框架来访问有关您的用户的位置信息。 您将需要实例化CLLocationManager对象并调用asynchronousstartUpdatingLocation消息。 您将通过您提供的CLLocationManagerDelegate获得用户位置的callback。
试试这个简单的步骤….
注意：如果使用模拟器手段，请检查设备位置的纬度和经度。 默认情况下它不是唯一的。
步骤1：在.h文件中导入CoreLocation框架
#import <CoreLocation/CoreLocation.h>
第2步：添加委托CLLocationManagerDelegate
@interface yourViewController : UIViewController<CLLocationManagerDelegate> { CLLocationManager *locationManager; CLLocation *currentLocation; }
第3步：在类文件中添加此代码
- (void)viewDidLoad { [super viewDidLoad]; [self CurrentLocationIdentifier]; // call this method }
步骤4：检测当前位置的方法
//------------ Current Location Address----- -(void)CurrentLocationIdentifier { //---- For getting current gps location locationManager = [CLLocationManager new]; locationManager.delegate = self; locationManager.distanceFilter = kCLDistanceFilterNone; locationManager.desiredAccuracy = kCLLocationAccuracyBest; [locationManager startUpdatingLocation]; //------ }
第5步：使用此方法获取位置
- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations { currentLocation = [locations objectAtIndex:0]; [locationManager stopUpdatingLocation]; CLGeocoder *geocoder = [[CLGeocoder alloc] init] ; [geocoder reverseGeocodeLocation:currentLocation completionHandler:^(NSArray *placemarks, NSError *error) { if (!(error)) { CLPlacemark *placemark = [placemarks objectAtIndex:0]; NSLog(@"\nCurrent Location Detected\n"); NSLog(@"placemark %@",placemark); NSString *locatedAt = [[placemark.addressDictionary valueForKey:@"FormattedAddressLines"] componentsJoinedByString:@", "]; NSString *Address = [[NSString alloc]initWithString:locatedAt]; NSString *Area = [[NSString alloc]initWithString:placemark.locality]; NSString *Country = [[NSString alloc]initWithString:placemark.country]; NSString *CountryArea = [NSString stringWithFormat:@"%@, %@", Area,Country]; NSLog(@"%@",CountryArea); } else { NSLog(@"Geocode failed with error %@", error); NSLog(@"\nCurrent Location Not Detected\n"); //return; CountryArea = NULL; } /*---- For more results placemark.region); placemark.country); placemark.locality); placemark.name); placemark.ocean); placemark.postalCode); placemark.subLocality); placemark.location); ------*/ }]; }
Xcode文档有丰富的知识和示例应用程序 – 查看位置感知编程指南 。
LocateMe示例项目说明了修改CLLocationManager的不同精度设置的效果
在Swift中（对于iOS 8+）。
的Info.plist
首先是事情。 您需要在info.plist文件中为NSLocationWhenInUseUsageDescription或NSLocationAlwaysUsageDescription添加描述性string，具体取决于您请求的服务types
码
import Foundation import CoreLocation class LocationManager: NSObject, CLLocationManagerDelegate { let manager: CLLocationManager var locationManagerClosures: [((userLocation: CLLocation) -> ())] = [] override init() { self.manager = CLLocationManager() super.init() self.manager.delegate = self } //This is the main method for getting the users location and will pass back the usersLocation when it is available func getlocationForUser(userLocationClosure: ((userLocation: CLLocation) -> ())) { self.locationManagerClosures.append(userLocationClosure) //First need to check if the apple device has location services availabel. (ie Some iTouch's don't have this enabled) if CLLocationManager.locationServicesEnabled() { //Then check whether the user has granted you permission to get his location if CLLocationManager.authorizationStatus() == .NotDetermined { //Request permission //Note: you can also ask for .requestWhenInUseAuthorization manager.requestWhenInUseAuthorization() } else if CLLocationManager.authorizationStatus() == .Restricted || CLLocationManager.authorizationStatus() == .Denied { //... Sorry for you. You can huff and puff but you are not getting any location } else if CLLocationManager.authorizationStatus() == .AuthorizedWhenInUse { // This will trigger the locationManager:didUpdateLocation delegate method to get called when the next available location of the user is available manager.startUpdatingLocation() } } } //MARK: CLLocationManager Delegate methods @objc func locationManager(manager: CLLocationManager, didChangeAuthorizationStatus status: CLAuthorizationStatus) { if status == .AuthorizedAlways || status == .AuthorizedWhenInUse { manager.startUpdatingLocation() } } func locationManager(manager: CLLocationManager, didUpdateToLocation newLocation: CLLocation, fromLocation oldLocation: CLLocation) { //Because multiple methods might have called getlocationForUser: method there might me multiple methods that need the users location. //These userLocation closures will have been stored in the locationManagerClosures array so now that we have the users location we can pass the users location into all of them and then reset the array. let tempClosures = self.locationManagerClosures for closure in tempClosures { closure(userLocation: newLocation) } self.locationManagerClosures = [] } }
用法
self.locationManager = LocationManager() self.locationManager.getlocationForUser { (userLocation: CLLocation) -> () in print(userLocation) }
你可以使用我写的这个服务来处理你的一切。
此服务将请求权限并处理CLLocationManager处理，因此您不必。
像这样使用：
LocationService.getCurrentLocationOnSuccess({ (latitude, longitude) -> () in //Do something with Latitude and Longitude }, onFailure: { (error) -> () in //See what went wrong print(error) })
