Answers:
RedBlueThing的答案对我来说非常有效。这是我如何做的一些示例代码。
#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,不赞成使用委托函数。新的代表是
- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations
因此要获得新的职位使用
[locations lastObject]
在iOS 8中,应该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];
您还必须将NSLocationAlwaysUsageDescription
或NSLocationWhenInUseUsageDescription
键的字符串添加到应用程序的Info.plist。否则,startUpdatingLocation
将忽略对的调用,并且您的委托将不会收到任何回调。
最后,当您完成位置读取后,在适当的位置调用stopUpdating位置。
[locationManager stopUpdatingLocation];
NSLocationAlwaysUsageDescription
如果您正在使用[self.locationManager requestAlwaysAuthorization]
或NSLocationWhenInUseUsageDescription
如果您正在使用[self.locationManager requestWhenInUseAuthorization]
。为了支持iOS 6.0+到iOS 7.0+,还包括密钥NSLocationUsageDescription
或“隐私-位置使用说明”。在链接更多信息:developer.apple.com/library/ios/documentation/General/Reference/...
在iOS 6中,
- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation
不推荐使用。
使用以下代码代替
- (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,仍然需要上述方法,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;
}
}
[locations lastObject]
吗?
您使用CoreLocation框架访问有关您的用户的位置信息。您将需要实例化一个CLLocationManager对象,并调用异步startUpdatingLocation消息。您将通过提供的CLLocationManagerDelegate获得带有用户位置的回调。
注意:如果使用模拟器,请检查设备位置的纬度和对数。默认情况下,仅此一项。
步骤1:CoreLocation
在.h文件中导入框架
#import <CoreLocation/CoreLocation.h>
步骤2:添加委托CLLocationManagerDelegate
@interface yourViewController : UIViewController<CLLocationManagerDelegate>
{
CLLocationManager *locationManager;
CLLocation *currentLocation;
}
步骤3:将此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);
------*/
}];
}
信息清单
首先是第一件事。您需要在info.plist文件中为密钥添加描述性字符串,NSLocationWhenInUseUsageDescription
或者NSLocationAlwaysUsageDescription
取决于您请求的服务类型
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)
}
self.locationManager = LocationManager()
在viewDidLoad方法中使用此行,以使ARC不会删除实例,并且位置弹出窗口消失得太快。
Xcode文档具有丰富的知识和示例应用程序-请查看《位置感知编程指南》。
该LocateMe示例项目说明修改的效果CLLocationManager的不同精度设置
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>
和这段代码...当然要确保您的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,您也可以将此代码放入viewDidLoad()中。
locationManager.delegate = self
locationManager.requestAlwaysAuthorization()
locationManager.distanceFilter = kCLDistanceFilterNone
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.requestLocation()
这两个用于requestLocation的请求可以使您离开,也可以省去必须离开的位置:)
func locationManager(_ manager: CLLocationManager, didFailWithError error: Error) {
print(error)
}
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
print(locations)
}
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
}
}