1 声明一个位置管理的属性
@property (nonatomic, strong) CLLocationManager* locationManager;／／CLLocationManagerDelegate（代理方法）
2 初始化对象
self.locationManager = [[CLLocationManager alloc] init];
self.locationManager.delegate = self;
self.locationManager.desiredAccuracy = kCLLocationAccuracyBest;
if ([self.locationManager respondsToSelector:@selector(requestWhenInUseAuthorization)]) {
NSLog(@"requestWhenInUseAuthorization");
[self.locationManager requestWhenInUseAuthorization];
}
//开始定位，不断调用其代理方法
[self.locationManager startUpdatingLocation];
3 记录位置信息
- (void)locationManager:(CLLocationManager *)manager
didUpdateLocations:(NSArray *)locations
{
// 1.获取用户位置的对象
CLLocation *location = [locations lastObject];
// 2.停止定位
[manager stopUpdatingLocation];
float altitude = location.altitude;
// NSLog(@"海拔高度为：%.2fm",altitude);
// NSLog(@"垂直精度为：%.2fm",location.verticalAccuracy);
// NSLog(@"当前速度：%.2fm",location.speed);
CLLocationCoordinate2D coordinate = location.coordinate;
// NSLog(@"纬度:%f 经度:%f", coordinate.latitude, coordinate.longitude);
CLGeocoder *geocoder = [[CLGeocoder alloc] init];
//根据经纬度反向地理编译出地址信息
[geocoder reverseGeocodeLocation:location completionHandler:^(NSArray *array, NSError *error){
if (array.count > 0){
CLPlacemark *placemark = [array objectAtIndex:0];
_city = placemark.locality;
if (!_city) {
//四大直辖市的城市信息无法通过locality获得，只能通过获取省份的方法来获得（如果city为空，则可知为直辖市）
_city = placemark.administrativeArea;
}
// NSLog(@"city--= %@", _city);
[self.destinationBtn setTitle:_city forState:UIControlStateNormal];
}
else if (error == nil && [array count] == 0)
{
NSLog(@"No results were returned.");
}
else if (error != nil)
{
// NSLog(@"An error occurred = %@", error);
}
}];
}