如何在iOS中获取用户的当前位置

Question

如何在iOS中从用户获取当前位置？

- mamrezo

---

好的，我会尽力为您翻译。以下是需要翻译的内容：如果您正在寻找适用于iOS 6的解决方案，请查看Rayn Wu的答案。 - swiftBoy

Answer 1

RedBlueThing的答案对我非常有效。这里是我的一些示例代码。

标题

#import <UIKit/UIKit.h>
#import <CoreLocation/CoreLocation.h>

@interface yourController : UIViewController <CLLocationManagerDelegate> {
    CLLocationManager *locationManager;
}

@end

主文件

在init方法中

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

回调函数。

- (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

iOS 6中代理函数已被弃用。新的代理是：

- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations

因此，要获取新位置，请使用：

[locations lastObject]

iOS 8

iOS 8中更新位置信息前必须显式请求权限。

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];

你还需要在应用程序的 Info.plist 中添加一个字符串，用于 NSLocationAlwaysUsageDescription 或 NSLocationWhenInUseUsageDescription 键。否则，对 startUpdatingLocation 的调用将被忽略，并且你的委托将不会接收到任何回调。

在定位完成后，在适当的位置调用 stopUpdatingLocation。

[locationManager stopUpdatingLocation];

- dplusm

---

谢谢您发布一个简单的代码片段来赞扬被接受的答案。 - AngeloS

注意这个例子，这些属性值会导致更高的电池消耗。 - DanSkeel

重要提示：您还需要“stopUpdatingLocations”，否则每次用户更改其位置时都会调用委托方法。因此，上述电池问题以及如果在此委托方法中触发另一个方法，则将一直被调用。编码愉快！干杯！ - Apple_iOS0304

您是让 StackOverflow 更加卓越的用户类型。您提供的代码片段非常优秀，希望更多人在他们的答案中包含它们。 - Danny

如果您使用的是iOS 8.0+，在项目的Info.plist文件中必须包含以下密钥：如果您使用[self.locationManager requestAlwaysAuthorization]，则包括NSLocationAlwaysUsageDescription；如果您使用[self.locationManager requestWhenInUseAuthorization]，则包括NSLocationWhenInUseUsageDescription。另外，为了支持iOS 6.0+到iOS 7.0+，请包括密钥NSLocationUsageDescription或'Privacy - Location Usage Description'。更多信息请参见链接：https://developer.apple.com/library/ios/documentation/General/Reference/InfoPlistKeyReference/Articles/CocoaKeys.html - Sihad Begovic

Answer 2

在iOS 6中，

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

已被弃用。

请改用以下代码。

- (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，但你需要处理授权。

_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;
    }
}

- Ryan Wu

---

这句话的意思是：这不应该是[locations lastObject]吗？ - Ian Dundas

我尝试了上述完全相同的步骤。但是控制台打印出“用户仍在思考”。这是否意味着该应用程序未被授权使用位置？如果是，我该如何允许该应用程序使用位置。请帮忙。 - kirans_6891

Answer 3

你需要使用 CoreLocation 框架 来获取用户的位置信息。你需要实例化一个 CLLocationManager 对象，并调用异步的 startUpdatingLocation 方法，然后通过你提供的 CLLocationManagerDelegate 来接收用户位置的回调。

- RedBlueThing

Answer 4

尝试这个简单的步骤...

注意: 如果您使用模拟器，请检查设备位置的纬度和经度。默认值为none。

步骤1: 在.h文件中导入CoreLocation框架。

#import <CoreLocation/CoreLocation.h>

步骤 2：添加委托 CLLocationManagerDelegate

@interface yourViewController : UIViewController<CLLocationManagerDelegate>
{
    CLLocationManager *locationManager;
    CLLocation *currentLocation;
}

第三步：将以下代码添加到类文件中

- (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];
    //------
}

步骤5： 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);
          ------*/
     }];
}

- Rajesh Loganathan

Answer 5

在 Swift 中（适用于 iOS 8+）。

Info.plist

首先，您需要在 info.plist 文件中添加描述性字符串，用于键 NSLocationWhenInUseUsageDescription 或 NSLocationAlwaysUsageDescription，具体取决于您请求的服务类型。

代码

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. (i.e. 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)
        }

- villy393

---

我相信在Swift中有一个类似于这种情况的switch()语句：^) - Anton Tropashko

在viewDidLoad方法中使用此行代码，以便ARC不会删除实例并使位置弹出窗口消失得太快：self.locationManager = LocationManager()。 - Kunal Gupta

Answer 6

Xcode文档库拥有丰富的知识和示例应用程序-请查看位置感知编程指南。

LocateMe示例项目演示了修改CLLocationManager不同精度设置的效果。

- defbyte

Answer 7

iOS 11.x Swift 4.0 Info.plist需要这两个属性

<key>NSLocationAlwaysAndWhenInUseUsageDescription</key>
<string>We're watching you</string>
<key>NSLocationWhenInUseUsageDescription</key>
<string>Watch Out</string>

而这段代码...当然要确保你是CLLocationManagerDelegate

let locationManager = CLLocationManager()

// MARK location Manager delegate code + more

func locationManager(_ manager: CLLocationManager, didChangeAuthorization status: CLAuthorizationStatus) {
    switch status {
    case .notDetermined:
        print("User still thinking")
    case .denied:
        print("User hates you")
    case .authorizedWhenInUse:
            locationManager.stopUpdatingLocation()
    case .authorizedAlways:
            locationManager.startUpdatingLocation()
    case .restricted:
        print("User dislikes you")
    }

当然，您也可以将以下代码放在viewDidLoad()中。

locationManager.delegate = self
locationManager.requestAlwaysAuthorization()
locationManager.distanceFilter = kCLDistanceFilterNone
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.requestLocation()

这两个是用于请求位置信息的，可以让您无需离开座位就能开始，也就是说帮助您省去了麻烦:)

func locationManager(_ manager: CLLocationManager, didFailWithError error: Error) {
    print(error)
}

func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
    print(locations)
}

- user3069232

Answer 8

你可以使用我编写的此服务来处理一切。

该服务将请求权限并处理CLLocationManager，无需您自己操作。

使用方法如下：

LocationService.getCurrentLocationOnSuccess({ (latitude, longitude) -> () in
    //Do something with Latitude and Longitude

    }, onFailure: { (error) -> () in

      //See what went wrong
      print(error)
})

- William Falcon

Answer 9

对于Swift 5，这里有一个快速简短的类可以获取位置：

class MyLocationManager: NSObject, CLLocationManagerDelegate {
    let manager: CLLocationManager

    override init() {
        manager = CLLocationManager()
        super.init()
        manager.delegate = self
        manager.distanceFilter = kCLDistanceFilterNone
        manager.desiredAccuracy = kCLLocationAccuracyBest
        manager.requestWhenInUseAuthorization()
        manager.startUpdatingLocation()
    }

    func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
        // do something with locations
    }
}

- Dave Elson

---

需要导入CoreLocation。 - Boaz Saragossi