我的应用在iOS 7上运行良好,但在iOS 8 SDK上却无法运行。
CLLocationManager不返回位置,我没有看到我的应用程序下设置->位置服务。我在这个问题上做了谷歌搜索,但没有任何结果。会有什么问题呢?
我的应用在iOS 7上运行良好,但在iOS 8 SDK上却无法运行。
CLLocationManager不返回位置,我没有看到我的应用程序下设置->位置服务。我在这个问题上做了谷歌搜索,但没有任何结果。会有什么问题呢?
当前回答
要在iOS 8中访问用户位置,你必须添加,
NSLocationAlwaysUsageDescription in the Info.plist
这将询问用户获取其当前位置的权限。
其他回答
解决方案与向后兼容,不产生Xcode警告:
SEL requestSelector = NSSelectorFromString(@"requestWhenInUseAuthorization");
if ([CLLocationManager authorizationStatus] == kCLAuthorizationStatusNotDetermined &&
[self.locationManager respondsToSelector:requestSelector]) {
((void (*)(id, SEL))[self.locationManager methodForSelector:requestSelector])(self.locationManager, requestSelector);
[self.locationManager startUpdatingLocation];
} else {
[self.locationManager startUpdatingLocation];
}
在Info.plist中设置NSLocationWhenInUseUsageDescription键。
对于iOS版本11.0+: 在Info.plist中设置NSLocationAlwaysAndWhenInUseUsageDescription键。还有另外2把钥匙。
我最终解决了自己的问题。
显然,在iOS 8 SDK中,在开始位置更新之前需要调用CLLocationManager上的requestAlwaysAuthorization(用于后台位置)或requestWhenInUseAuthorization(仅用于前台位置)。
在Info中还需要NSLocationAlwaysUsageDescription或NSLocationWhenInUseUsageDescription键。Plist并在提示符中显示一条消息。加上这些就解决了我的问题。
更多详细信息,请查看:Core-Location-Manager-Changes-in-ios-8
objective - c程序 遵循以下指示:
对于iOS-11 对于iOS 11,看看这个答案:iOS 11位置访问
需要在plist中添加两个键并提供如下图所示的消息:
1. NSLocationAlwaysAndWhenInUseUsageDescription
2. NSLocationWhenInUseUsageDescription
3. NSLocationAlwaysUsageDescription
对于iOS-10及以下版本:
NSLocationWhenInUseUsageDescription
locationManager = [[CLLocationManager alloc] init];
locationManager.delegate = self;
locationManager.desiredAccuracy = kCLLocationAccuracyThreeKilometers;
if([locationManager respondsToSelector:@selector(requestWhenInUseAuthorization)]){
[locationManager requestWhenInUseAuthorization];
}else{
[locationManager startUpdatingLocation];
}
委托方法
#pragma mark - Lolcation Update
- (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error
{
NSLog(@"didFailWithError: %@", error);
UIAlertView *errorAlert = [[UIAlertView alloc]
initWithTitle:@"Error" message:@"Failed to Get Your Location" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
[errorAlert show];
}
-(void)locationManager:(CLLocationManager *)manager didChangeAuthorizationStatus:(CLAuthorizationStatus)status
{
switch (status) {
case kCLAuthorizationStatusNotDetermined:
case kCLAuthorizationStatusRestricted:
case kCLAuthorizationStatusDenied:
{
// do some error handling
}
break;
default:{
[locationManager startUpdatingLocation];
}
break;
}
}
- (void)locationManager:(CLLocationManager *)manager
didUpdateLocations:(NSArray *)locations
{
CLLocation *location = [locations lastObject];
userLatitude = [NSString stringWithFormat:@"%f", location.coordinate.latitude] ;
userLongitude = [NSString stringWithFormat:@"%f",location.coordinate.longitude];
[locationManager stopUpdatingLocation];
}
迅速的过程
遵循以下指示:
对于iOS-11 对于iOS 11,看看这个答案:iOS 11位置访问
需要在plist中添加两个键并提供如下图所示的消息:
1. NSLocationAlwaysAndWhenInUseUsageDescription
2. NSLocationWhenInUseUsageDescription
3. NSLocationAlwaysUsageDescription
对于iOS-10及以下版本:
import CoreLocation
class ViewController: UIViewController ,CLLocationManagerDelegate {
var locationManager = CLLocationManager()
//MARK- Update Location
func updateMyLocation(){
locationManager.delegate = self;
locationManager.desiredAccuracy = kCLLocationAccuracyThreeKilometers;
if locationManager.respondsToSelector(#selector(CLLocationManager.requestWhenInUseAuthorization)){
locationManager.requestWhenInUseAuthorization()
}
else{
locationManager.startUpdatingLocation()
}
}
委托方法
//MARK: Location Update
func locationManager(manager: CLLocationManager, didFailWithError error: NSError) {
NSLog("Error to update location :%@",error)
}
func locationManager(manager: CLLocationManager, didChangeAuthorizationStatus status: CLAuthorizationStatus) {
switch status {
case .NotDetermined: break
case .Restricted: break
case .Denied:
NSLog("do some error handling")
break
default:
locationManager.startUpdatingLocation()
}
}
func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
let location = locations.last! as CLLocation
var latitude = location.coordinate.latitude
var longitude = location.coordinate.longitude
}
为了访问用户在iOS中的位置。您需要添加两个键
NSLocationWhenInUseUsageDescription
NSLocationAlwaysUsageDescription
进入信息。plist文件。
<key>NSLocationWhenInUseUsageDescription</key>
<string>Because I want to know where you are!</string>
<key>NSLocationAlwaysUsageDescription</key>
<string>Want to know where you are!</string>
请看下图。
向后兼容解决方案:
SEL requestSelector = NSSelectorFromString(@"requestWhenInUseAuthorization");
if ([CLLocationManager authorizationStatus] == kCLAuthorizationStatusNotDetermined &&
[self.locationManager respondsToSelector:requestSelector]) {
[self.locationManager performSelector:requestSelector withObject:NULL];
} else {
[self.locationManager startUpdatingLocation];
}
在Info.plist中设置NSLocationWhenInUseUsageDescription键