ios中关于系统定位CLLocationManager的使用解析

//1、添加定位管理委托协议 CLLocationManagerDelegate

　//2、初始化定位管理对象

self.locationManager=[[CLLocationManager alloc]init];

self.locationManager.delegate=self;

//定位精度

self.locationManager.desiredAccuracy=kCLLocationAccuracyBest;

//多长距离更新一次位置

self.locationManager.distanceFilter=50;

if (UIDevice.currentDevice.systemVersion.integerValue>8.0)

{

[self.locationManager requestAlwaysAuthorization];

[self.locationManager requestWhenInUseAuthorization];

}

　//开启定位服务

if (self.locationManager.locationServicesEnabled) {

[self.locationManager startUpdatingLocation];

}

　//3、调用系统定位方法

　　

#pragma mark - CLLocation Delegate

- (void)locationManager:(CLLocationManager *)manager didChangeAuthorizationStatus:(CLAuthorizationStatus)status

{

switch (status)

{

case kCLAuthorizationStatusNotDetermined:

if ([_locationManager respondsToSelector:@selector(requestAlwaysAuthorization)])

{

[_locationManager requestAlwaysAuthorization];

}

break;

default:

break;

}

}

- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations

{

//获取当前位置信息

CLLocation *location = [locations objectAtIndex:0];

//判断是否是在国内

if (![WGS84TOGCJ02 isLocationOutOfChina:[location coordinate]])

{

　　　//设置锁，防止并发写入

[[NSUserDefaults standardUserDefaults] synchronize];

//转换后的coord

CLLocationCoordinate2D coord = [WGS84TOGCJ02 transformFromWGSToGCJ:[location coordinate]];

_myCoordinate = coord;

[[NSUserDefaults standardUserDefaults] setObject:[NSString stringWithFormat:@"%f",_myCoordinate.latitude] forKey:KCurrentLat];

[[NSUserDefaults standardUserDefaults] setObject:[NSString stringWithFormat:@"%f",_myCoordinate.longitude] forKey:KCurrentLng];

}

//创建反地理编码对象

CLGeocoder *geocoder = [[CLGeocoder alloc] init];

　//将经纬度信息转换成字符串位置信息

[geocoder reverseGeocodeLocation:location completionHandler:^(NSArray *array, NSError *error)

{

//         NSLog(@"placemark:%@",array);

if (array.count > 0)

{

CLPlacemark *placemark = [array objectAtIndex:0];

if (![DGFunction xfunc_check_strEmpty:placemark.locality])

{

[[ NSUserDefaults standardUserDefaults] setObject:placemark.locality forKey:@"localCity"];

[[NSUserDefaults standardUserDefaults] synchronize];

//                 NSDictionary *dic = @{@"city":placemark.locality};

if (![DGFunction xfunc_check_strEmpty:placemark.locality]) {

[[NSUserDefaults standardUserDefaults] setObject:placemark.administrativeArea forKey:k_Current_Province];

}

if (![DGFunction xfunc_check_strEmpty:placemark.locality]) {

[[NSUserDefaults standardUserDefaults] setObject:placemark.locality forKey:k_Current_City];

}

if (![DGFunction xfunc_check_strEmpty:placemark.subLocality]) {

[[NSUserDefaults standardUserDefaults] setObject:placemark.subLocality forKey:k_Current_Area];

}

[[NSUserDefaults standardUserDefaults] synchronize];

NSLog(@"locality:%@ subLocality:%@",placemark.locality,placemark.subLocality);

//关闭定位服务

　　　　　　[_locationManager stopUpdatingLocation];

}

}

}];

}