首先创建locationManager ,这样就可以验证地理位置服务验证。
self.locationManager= [[CLLocationManageralloc]init];
locationManager 有个代理方法 CLLocationManagerDelegate
self.locationManager.delegate=self;
//超定一定范围调用
self.locationManager.distanceFilter=kCLLocationAccuracyHundredMeters;
kCLLocationAccuracyHundredMeters 适合徒步。
// 定位精度
self.locationManager.desiredAccuracy=kCLLocationAccuracyBest;
// 程序进入后台 significantLocationChangeMonitoringAvailable 判断设备是否支持重要位置变化的监测
[[NSNotificationCenterdefaultCenter]addObserverForName:UIApplicationWillResignActiveNotificationobject:nilqueue:nilusingBlock:^(NSNotification*_Nonnullnote) {
// Stop normal location updates and start significant location change updates for battery efficiency.
if([CLLocationManager significantLocationChangeMonitoringAvailable]) {
[weakSelf.locationManagerstopUpdatingLocation];
[weakSelf.locationManagerstartMonitoringSignificantLocationChanges];
}else{
NSLog(@"Significant location change monitoring is not available.");
}
}];
// 程序进入foreground
[[NSNotificationCenterdefaultCenter]addObserverForName:UIApplicationWillEnterForegroundNotificationobject:nilqueue:nilusingBlock:^(NSNotification*_Nonnullnote) {
if([CLLocationManagersignificantLocationChangeMonitoringAvailable]) {
// Stop significant location updates and start normal location updates again since the app is in the forefront.
[weakSelf.locationManagerstartUpdatingLocation];
[weakSelf.locationManagerstopMonitoringSignificantLocationChanges];
}
else{
NSLog(@"Significant location change monitoring is not available.");
}
}];
用到三个方法分别是
// 验证发生变化得时候开始定位。
- (void)locationManager:(CLLocationManager*)manager didChangeAuthorizationStatus:(CLAuthorizationStatus)status{
if(status ==kCLAuthorizationStatusAuthorizedAlways|| status ==kCLAuthorizationStatusAuthorizedWhenInUse) {
[self.locationManagerstartUpdatingLocation];
}
}
// 地理位置发生改变时触发 通过CLGeocoder 进行地理编码 获取地域位置。
- (void)locationManager:(CLLocationManager*)manager
didUpdateLocations:(NSArray*)locations {
CLLocation*currLocation = [locationslastObject];
NSLog(@"经度=%f 纬度=%f 高度=%f", currLocation.coordinate.latitude,
currLocation.coordinate.longitude, currLocation.altitude);
m_pLocationCoord= currLocation.coordinate;
CLLocation*c =
[[CLLocationalloc]initWithLatitude:currLocation.coordinate.latitude
longitude:currLocation.coordinate.longitude];
//创建位置
CLGeocoder*revGeo = [[CLGeocoderalloc]init];
[revGeoreverseGeocodeLocation:c
completionHandler:^(NSArray*placemarks,NSError*error) {
if(!error && [placemarkscount] >0) {
NSDictionary*dict1 =
[[placemarksobjectAtIndex:0]addressDictionary];
NSLog(@"%@", dict1);
NSString*stringCity = [dict1objectForKey:@"City"];
NSArray*array =
[stringCitycomponentsSeparatedByString:@"市"];
if(array.count>0) {
[[NSNotificationCenterdefaultCenter]postNotificationName:kNotificationLocationCitySucceedobject:[arrayobjectAtIndex:0]];
}
}else{
//GetLoctionCity(@"定位失败");
NSLog(@"ERROR: %@", error);
}
}];
}
// 定位失败
- (void)locationManager:(CLLocationManager*)manager didFailWithError:(NSError*)error {
//NSLog(@"didFailWithError: %@", error);
if([errorcode] ==kCLErrorDenied) {
//访问被拒绝
[[NSNotificationCenterdefaultCenter]postNotificationName:kNotificationLocationCityFailobject:@"请打开该app的位置服务!"];
}
if([errorcode] ==kCLErrorLocationUnknown) {
//无法获取位置信息
[[NSNotificationCenterdefaultCenter]postNotificationName:kNotificationLocationCityFailobject:@"定位失败！"];
}
}
在 不用定位的时候 stopUpdatingLocation