如何检查我的应用是否启用了定位服务？
我有 2 个故事板，我想检查定位服务。如果为我的应用启用了位置服务，我想启动带有位置的地图故事板。否则，我想启动另一个故事板。如何以编程方式进行？
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82887 次
8 回答
138
这是正确的。
if ([CLLocationManager locationServicesEnabled]){
NSLog(@"Location Services Enabled");
if ([CLLocationManager authorizationStatus]==kCLAuthorizationStatusDenied){
alert = [[UIAlertView alloc] initWithTitle:@"App Permission Denied"
message:@"To re-enable, please go to Settings and turn on Location Service for this app."
delegate:nil
cancelButtonTitle:@"OK"
otherButtonTitles:nil];
[alert show];
}
}
于 2013-03-01T08:40:00.607 回答
27
在 iOS 9.2 上测试
为了获取位置更新，我们应该经常检查
- 在用户的 iOS 设备上启用的定位服务和
- 为特定应用启用的定位服务
并在正确的设置屏幕上启动用户以启用
启动 iOS 设备位置设置页面
Step.1 转到项目设置--> 信息--> URL 类型--> 添加新的 URL 方案
Step.2 使用以下代码启动直接手机的位置设置页面：（注意：URL Scheme 在 iOS 10+ 中有所不同，我们检查版本这里说明）
#define SYSTEM_VERSION_LESS_THAN(v) ([[[UIDevice
currentDevice] systemVersion] compare:v options:NSNumericSearch] ==
NSOrderedAscending)
//Usage
NSString* url = SYSTEM_VERSION_LESS_THAN(@"10.0") ? @"prefs:root=LOCATION_SERVICES" : @"App-Prefs:root=Privacy&path=LOCATION";
[[UIApplication sharedApplication] openURL:[NSURL URLWithString: url]];
启动应用程序位置设置页面
使用以下代码启动直接应用程序的位置设置页面
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:UIApplicationOpenSettingsURLString]];
这是完整的代码示例：
#define SYSTEM_VERSION_LESS_THAN(v) ([[[UIDevice
currentDevice] systemVersion] compare:v options:NSNumericSearch] ==
NSOrderedAscending)
CLLocationManager *locationManager;
-(void) checkLocationServicesAndStartUpdates
{
locationManager = [[CLLocationManager alloc] init];
locationManager.delegate = self;
locationManager.desiredAccuracy = kCLLocationAccuracyBest;
if ([locationManager respondsToSelector:@selector(requestWhenInUseAuthorization)])
{
[locationManager requestWhenInUseAuthorization];
}
//Checking authorization status
if (![CLLocationManager locationServicesEnabled] && [CLLocationManager authorizationStatus] == kCLAuthorizationStatusDenied)
{
UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Location Services Disabled!"
message:@"Please enable Location Based Services for better results! We promise to keep your location private"
delegate:self
cancelButtonTitle:@"Settings"
otherButtonTitles:@"Cancel", nil];
//TODO if user has not given permission to device
if (![CLLocationManager locationServicesEnabled])
{
alertView.tag = 100;
}
//TODO if user has not given permission to particular app
else
{
alertView.tag = 200;
}
[alertView show];
return;
}
else
{
//Location Services Enabled, let's start location updates
[locationManager startUpdatingLocation];
}
}
处理用户点击响应，并启动正确的位置设置
-(void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
if(buttonIndex == 0)//Settings button pressed
{
if (alertView.tag == 100)
{
//This will open ios devices location settings
NSString* url = SYSTEM_VERSION_LESS_THAN(@"10.0") ? @"prefs:root=LOCATION_SERVICES" : @"App-Prefs:root=Privacy&path=LOCATION";
[[UIApplication sharedApplication] openURL:[NSURL URLWithString: url]];
}
else if (alertView.tag == 200)
{
//This will opne particular app location settings
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:UIApplicationOpenSettingsURLString]];
}
}
else if(buttonIndex == 1)//Cancel button pressed.
{
//TODO for cancel
}
}
于 2016-03-14T08:42:36.543 回答
21
-(void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error{
NSLog(@"%@",error.userInfo);
if([CLLocationManager locationServicesEnabled]){
NSLog(@"Location Services Enabled");
if([CLLocationManager authorizationStatus]==kCLAuthorizationStatusDenied){
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"App Permission Denied"
message:@"To re-enable, please go to Settings and turn on Location Service for this app."
delegate:nil
cancelButtonTitle:@"OK"
otherButtonTitles:nil];
[alert show];
}
}
}
这背后的原因是，当您的服务将禁用位置服务时，此方法将调用。这段代码对我有用。
于 2014-01-15T04:42:52.163 回答
13
检查CLLocationManager 的 locationServicesEnabled属性以检查系统范围的可用性。使用您的CLLocationManagerDelegate 的 locationManager: didFailWithError:方法并检查kCLErrorDenied错误以查看用户是否拒绝位置服务。
BOOL locationAllowed = [CLLocationManager locationServicesEnabled];
if (!locationAllowed)
{
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Location Service Disabled"
message:@"To re-enable, please go to Settings and turn on Location Service for this app."
delegate:nil
cancelButtonTitle:@"OK"
otherButtonTitles:nil];
[alert show];
[alert release];
}
为您的应用使用此代码
- (void)viewDidLoad
{
locationManager = [[CLLocationManager alloc] init];
locationManager.delegate = self;
locationManager.desiredAccuracy = kCLLocationAccuracyKilometer;
// Set a movement threshold for new events.
locationManager.distanceFilter = 500;
[locationManager startUpdatingLocation];
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
}
- (void)locationManager:(CLLocationManager *)manager
didUpdateLocations:(NSArray *)locations {
// If it's a relatively recent event, turn off updates to save power
}
- (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error
{
NSLog(@"%@",error);
}
如果您的应用程序禁用了位置服务，那么它会给您错误
Error Domain=kCLErrorDomain Code=1 "The operation couldn’t be completed. (kCLErrorDomain error 1.)"
于 2013-03-01T08:01:59.713 回答
13
在最新的 Swift 5.0、Xcode 11.2.1 中更新
import UIKit
import CoreLocation
用户常量
struct UserConstants {
static let latitude = "latitude"
static let longitude = "longitude"
static let lastKnownLatitude = "lastKnownLatitude"
static let lastKnownLongitude = "lastKnownLongitude"
}
Location Manager Delegate 用于监控位置变化
@objc protocol LocationManagerDelegate {
@objc optional func getLocation(location: CLLocation)
}
class LocationHelper: NSObject, CLLocationManagerDelegate {
weak var locationManagerDelegate: LocationManagerDelegate?
var isLocationfetched: Bool = false
var lastKnownLocation: CLLocation? {
get {
let latitude = UserDefaults.standard.double(forKey: UserConstants.lastKnownLatitude)
let longitude = UserDefaults.standard.double(forKey: UserConstants.lastKnownLongitude)
if latitude.isZero || longitude.isZero {
return nil
}
return CLLocation(latitude: latitude, longitude: longitude)
}
set {
UserDefaults.standard.set(newValue?.coordinate.latitude ?? 0, forKey: UserConstants.lastKnownLatitude)
UserDefaults.standard.set(newValue?.coordinate.longitude ?? 0, forKey: UserConstants.lastKnownLongitude)
UserDefaults.standard.synchronize()
}
}
struct SharedInstance {
static let instance = LocationHelper()
}
class var shared: LocationHelper {
return SharedInstance.instance
}
enum Request {
case requestWhenInUseAuthorization
case requestAlwaysAuthorization
}
var clLocationManager = CLLocationManager()
func setAccuracy(clLocationAccuracy: CLLocationAccuracy) {
clLocationManager.desiredAccuracy = clLocationAccuracy
}
var isLocationEnable: Bool = false {
didSet {
if !isLocationEnable {
lastKnownLocation = nil
}
}
}
带有授权检查的位置更新
func startUpdatingLocation() {
isLocationfetched = false
if CLLocationManager.locationServicesEnabled() {
switch CLLocationManager.authorizationStatus() {
case .notDetermined:
clLocationManager.delegate = self
clLocationManager.requestWhenInUseAuthorization()
clLocationManager.desiredAccuracy = kCLLocationAccuracyBestForNavigation
clLocationManager.startUpdatingLocation()
isLocationEnable = true
case .restricted, .denied:
showLocationAccessAlert()
isLocationEnable = false
case .authorizedAlways, .authorizedWhenInUse:
self.clLocationManager.delegate = self
self.clLocationManager.startUpdatingLocation()
isLocationEnable = true
default:
print("Invalid AuthorizationStatus")
}
} else {
isLocationEnable = false
showLocationAccessAlert()
}
}
如果不允许权限，则显示位置警报
func showLocationAccessAlert() {
let alertController = UIAlertController(title: "Location Permission Required", message: "Please enable location permissions in settings.", preferredStyle: UIAlertController.Style.alert)
let okAction = UIAlertAction(title: "settings", style: .default, handler: {(cAlertAction) in
UIApplication.shared.open(URL(string: UIApplication.openSettingsURLString)!)
})
let cancelAction = UIAlertAction(title: "cancel", style: UIAlertAction.Style.cancel)
alertController.addAction(cancelAction)
alertController.addAction(okAction)
let appdelegate = UIApplication.shared.delegate as? AppDelegate
appdelegate?.window?.rootViewController?.present(alertController, animated: true, completion: nil)
}
func stopUpdatingLocation() {
self.clLocationManager.stopUpdatingLocation()
}
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
if !isLocationfetched {
isLocationfetched = true
clLocationManager.startMonitoringSignificantLocationChanges()
NotificationCenter.default.post(name: NSNotification.Name.updateLocationNotification, object: nil)
}
let userLocation = locations[0] as CLLocation
self.lastKnownLocation = userLocation
if let delegate = self.locationManagerDelegate {
delegate.getLocation!(location: userLocation)
}
}
func locationManager(_ manager: CLLocationManager, didChangeAuthorization status: CLAuthorizationStatus) {
if (status == CLAuthorizationStatus.denied) {
// The user denied authorization
isLocationEnable = false
} else if (status == CLAuthorizationStatus.authorizedWhenInUse) {
// The user accepted authorization
self.clLocationManager.delegate = self
self.clLocationManager.startUpdatingLocation()
isLocationEnable = true
}
}
func locationManager(_ manager: CLLocationManager, didFailWithError error: Error) {
print("\n error description for location updation:- \(error.localizedDescription)")
}
}
对于上面的测试，只需在您的控制器中编写这些代码行，
LocationHelper.shared.locationManagerDelegate = self
LocationHelper.shared.startUpdatingLocation()
LocationManagerDelegate 方法
extension ViewController: LocationManagerDelegate {
func getLocation(location: CLLocation) {
currentLocation = location.coordinate
}
}
于 2019-12-20T13:19:48.820 回答
11
经过大量调查。我建议将此消息显示在标签上而不是警报视图上。因为，有很多情况需要测试（用户一般禁用位置服务或仅用于应用程序。删除应用程序，重新安装）。
其中一种情况会导致您的警报同时显示您的消息以及苹果的警报消息。您的警报将落后于苹果的警报。这是一种令人困惑且不合逻辑的行为。
我推荐以下内容：
斯威夫特 3：
func locationManager(_ manager: CLLocationManager, didChangeAuthorization status: CLAuthorizationStatus) {
switch status {
case .notDetermined:
Log.verbose("User still thinking granting location access!")
manager.startUpdatingLocation() // this will access location automatically if user granted access manually. and will not show apple's request alert twice. (Tested)
break
case .denied:
Log.verbose("User denied location access request!!")
// show text on label
label.text = "To re-enable, please go to Settings and turn on Location Service for this app."
manager.stopUpdatingLocation()
loadingView.stopLoading()
break
case .authorizedWhenInUse:
// clear text
label.text = ""
manager.startUpdatingLocation() //Will update location immediately
break
case .authorizedAlways:
// clear text
label.text = ""
manager.startUpdatingLocation() //Will update location immediately
break
default:
break
}
}
目标-C：
- (void)locationManager:(CLLocationManager*)manager didChangeAuthorizationStatus:(CLAuthorizationStatus)status {
switch (status) {
case kCLAuthorizationStatusNotDetermined: {
DDLogVerbose(@"User still thinking granting location access!");
[locationManager startUpdatingLocation]; // this will access location automatically if user granted access manually. and will not show apple's request alert twice. (Tested)
} break;
case kCLAuthorizationStatusDenied: {
DDLogVerbose(@"User denied location access request!!");
// show text on label
label.text = @"To re-enable, please go to Settings and turn on Location Service for this app.";
[locationManager stopUpdatingLocation];
[loadingView stopLoading];
} break;
case kCLAuthorizationStatusAuthorizedWhenInUse:
case kCLAuthorizationStatusAuthorizedAlways: {
// clear text
label.text = @"";
[locationManager startUpdatingLocation]; //Will update location immediately
} break;
default:
break;
}
}
于 2015-09-14T08:50:23.870 回答
5
最好的方法，处理所有情况！->
//First, checking if the location services are enabled
if(![CLLocationManager locationServicesEnabled]){
[self showMessage:@"Please enable location services to detect location!" withTitle:@"Location not enabled"];
}
else if ([CLLocationManager authorizationStatus]==kCLAuthorizationStatusDenied){
//Now if the location is denied.
UIAlertController *alertController = [UIAlertController
alertControllerWithTitle:@"Enable location permission"
message:@"To auto detect location, please enable location services for this app"
preferredStyle:UIAlertControllerStyleAlert];
alertController.view.tintColor = AppColor;
UIAlertAction *cancelAction = [UIAlertAction
actionWithTitle:@"Dismiss"
style:UIAlertActionStyleCancel
handler:^(UIAlertAction *action)
{
NSLog(@"Cancel action");
}];
UIAlertAction *goToSettings = [UIAlertAction
actionWithTitle:@"Settings"
style:UIAlertActionStyleDefault
handler:^(UIAlertAction *action)
{
//Simple way to open settings module
NSURL *url = [NSURL URLWithString:UIApplicationOpenSettingsURLString];
[[UIApplication sharedApplication] openURL:url];
}];
[alertController addAction:cancelAction];
[alertController addAction:goToSettings];
[self presentViewController:alertController animated:YES completion:^{
alertController.view.tintColor = AppColor;
}];
}
else{
//Do whatever you want here
}
于 2017-04-05T06:31:05.983 回答
3
Swift 3.0 & iOS 10 解决方案：
self.locationManager?.requestWhenInUseAuthorization()
if CLLocationManager.locationServicesEnabled() && CLLocationManager.authorizationStatus() != CLAuthorizationStatus.denied {
locationManager?.delegate = self
locationManager?.desiredAccuracy = kCLLocationAccuracyBestForNavigation
locationManager?.distanceFilter = distanceFiler
locationManager?.startUpdatingLocation()
}else{
let alertView = UIAlertView(title: "Location Services Disabled!", message: "Please enable Location Based Services for better results! We promise to keep your location private", delegate: self, cancelButtonTitle: "Settings", otherButtonTitles: "Cancel")
alertView.delegate = self
alertView.show()
return
}
@objc(alertView:clickedButtonAtIndex:) func alertView(_ alertView: UIAlertView, clickedButtonAt buttonIndex: Int) {
if buttonIndex == 0 {
if let url = URL(string: "App-Prefs:root=LOCATION_SERVICES") {
UIApplication.shared.open(url, completionHandler: .none)
}
}
else if buttonIndex == 1 {
//TODO for cancel
}
}
于 2017-04-21T09:16:05.823 回答