简易的IOS位置定位服务

有时一些小的需求，其实只是需要得知当前IOS APP使用的地点，有些只是想精确到城市级别，并不需要任何地图。

有了以下的简易实现：

@interface MainViewController ()<CLLocationManagerDelegate>

....

@end

@implementation MainViewController

- (void)InitLocation {

//初始化定位服务管理对象

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

self.locationManager.delegate = self;

self.locationManager.desiredAccuracy = kCLLocationAccuracyThreeKilometers;

self.locationManager.distanceFilter = 1000.0f;

}

/*

其中位置的精确性有如下几个级别，越是精确，程序回调就越慢！当前的例子只是到城市级别，所以使用kCLLocationAccuracyThreeKilometers

extern const CLLocationAccuracy kCLLocationAccuracyBestForNavigation __OSX_AVAILABLE_STARTING(__MAC_10_7,__IPHONE_4_0);

extern const CLLocationAccuracy kCLLocationAccuracyBest;

extern const CLLocationAccuracy kCLLocationAccuracyNearestTenMeters;

extern const CLLocationAccuracy kCLLocationAccuracyHundredMeters;

extern const CLLocationAccuracy kCLLocationAccuracyKilometer;

extern const CLLocationAccuracy kCLLocationAccuracyThreeKilometers;

*/

- (void) viewWillAppear:(BOOL)animated{

//开始定位

if(isSetAddress == FALSE){

dispatch_async(dispatch_get_main_queue(), ^{

[self InitLocation];

[self.locationManager requestWhenInUseAuthorization];

[self.locationManager startUpdatingLocation];

});

}

}

#pragma mark Core Location委托方法用于实现位置的更新，可以得到经纬度，省、城市、街道

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

(NSArray *)locations

{

CLLocation * currLocation = [locations lastObject];

NSLog(@"latitude=%3.5f, longitude=%3.5f, altitude=%3.5f", currLocation.coordinate.latitude, currLocation.coordinate.longitude, currLocation.altitude);

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

[geocoder reverseGeocodeLocation:currLocation

completionHandler:^(NSArray *placemarks, NSError *error) {

if ([placemarks count] > 0) {

CLPlacemark *placemark = placemarks[0];

NSDictionary *addressDictionary = placemark.addressDictionary;

NSString *address = [addressDictionary objectForKey:(NSString *) kABPersonAddressStreetKey];

address = address == nil ? @"": address;

NSString *state = [addressDictionary objectForKey:(NSString *) kABPersonAddressStateKey];

state = state == nil ? @"": state;

NSString *city = [addressDictionary objectForKey:(NSString *) kABPersonAddressCityKey];

city = city == nil ? @"": city;

NSLog(@"Place description: %@ \n%@ \n%@",state, address,city);

self.userAddress = [[NSString alloc] initWithFormat:@"%@", city];

dispatch_async(dispatch_get_main_queue(), ^{

NSLog(@"SetLiveShowAddress start");

int ret = SetLiveShowAddress(city, address);

if(ret == 0){

isSetAddress = TRUE;

[self.locationManager stopUpdatingLocation];

}

NSLog(@"SetLiveShowAddress end");

});

}

}];

}

- (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error

{

NSLog(@"error: %@",error);

}

@end