如何从iOS中的用户获取当前位置？
答案 0 :(得分：334)
RedBlueThing的答案对我来说非常好。以下是我如何做到的一些示例代码。
#import <UIKit/UIKit.h>
#import <CoreLocation/CoreLocation.h>
@interface yourController : UIViewController <CLLocationManagerDelegate> {
CLLocationManager *locationManager;
}
@end
在init方法
中locationManager = [[CLLocationManager alloc] init];
locationManager.delegate = self;
locationManager.distanceFilter = kCLDistanceFilterNone;
locationManager.desiredAccuracy = kCLLocationAccuracyBest;
[locationManager startUpdatingLocation];
回调功能
- (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);
}
在iOS 6中，不推荐使用委托功能。新代表是
- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations
因此，要获得新职位
[locations lastObject]
在iOS 8中，应在开始更新位置之前明确询问权限
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];
您还必须为应用的Info.plist添加NSLocationAlwaysUsageDescription或NSLocationWhenInUseUsageDescription键的字符串。否则，将忽略对startUpdatingLocation的调用，并且您的代理将不会收到任何回调。
最后，当您在适当的位置阅读位置呼叫stopUpdating位置时。
[locationManager stopUpdatingLocation];
答案 1 :(得分：76)
在iOS 6中，
- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation
已弃用。
使用以下代码
- (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，上述方法仍然是必需的，但您必须处理授权。
_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;
}
}
答案 2 :(得分：61)
您可以使用CoreLocation framework访问有关您用户的位置信息。您需要实例化CLLocationManager对象并调用异步startUpdatingLocation消息。您将通过您提供的CLLocationManagerDelegate获得用户位置的回调。
答案 3 :(得分：30)
注意：请检查设备位置纬度＆amp;如果你正在使用模拟器手段的逻辑。默认情况下，它是唯一的。
第1步：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：在课程文件中添加此代码
- (void)viewDidLoad
{
[super viewDidLoad];
[self CurrentLocationIdentifier]; // call this method
}
第4步：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);
------*/
}];
}
答案 4 :(得分：14)
<强>的Info.plist
首先要做的事情。您需要在info.plist文件中为密钥NSLocationWhenInUseUsageDescription或NSLocationAlwaysUsageDescription添加描述性字符串，具体取决于您要求的服务类型
<强>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 = []
}
}
<强>用法
self.locationManager = LocationManager()
self.locationManager.getlocationForUser { (userLocation: CLLocation) -> () in
print(userLocation)
}
答案 5 :(得分：12)
Xcode文档拥有丰富的知识和示例应用程序 - 请查看Location Awareness Programming Guide。
LocateMe示例项目说明了修改CLLocationManager不同精度设置的效果
答案 6 :(得分：2)
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>
这段代码......当然要确保你的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")
}
当然这个代码也可以放在viewDidLoad（）中。
locationManager.delegate = self
locationManager.requestAlwaysAuthorization()
locationManager.distanceFilter = kCLDistanceFilterNone
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.requestLocation()
这两个用于requestLocation让你去，也就是说你不得不离开座位：）
func locationManager(_ manager: CLLocationManager, didFailWithError error: Error) {
print(error)
}
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
print(locations)
}
答案 7 :(得分：1)
您可以使用我写的this service为您处理一切。
此服务将请求权限并处理CLLocationManager的处理，因此您不必这样做。
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)
})
答案 8 :(得分：0)
对于Swift 5，下面是一个简短的简短课程来获取位置：
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
}
}