在很多的APP开发中经常使用到定位功能，对于这种常用的方法很有必要对其封装使用

话不多说直接上代码：使用到了单例设计模式:
`

import <Foundation/Foundation.h>

import <MapKit/MapKit.h>

@protocol PositionToolDelegate <NSObject>

@optional
/**

• 位置改变时通知传值
  */
  • (void)noticePositionChanged;

@end

@interface PositionTool : NSObject<CLLocationManagerDelegate,PositionToolDelegate> {
CLLocationManager _locationManager;
NSMutableArray _locationArr ;
}

@property (nonatomic,assign) CLLocationDegrees latitude;//经度
@property (nonatomic,assign) CLLocationDegrees longtitude;//纬度
/**

• 位置地区信息
  /
  @property (nonatomic,strong) NSString positionName;
  @property (nonatomic,strong) NSString province;
  @property (nonatomic,strong) NSString city;
  @property (nonatomic,strong) NSString *area;

//@property (nonatomic,strong) id<PositionToolDelegate> delegate;

/**

• 添加回调代理方法
  */
  • (void)addDelegate:(id)delegate;
    /**
• 移除回调代理方法
  */
  • (void)removeDelegate:(id)delegate;
    /**
• 获取位置中心信息
  */
  • (CLLocationCoordinate2D)getCenter;
    /**
• 更新位置
  */
  • (void)updateLocation;

• (void)getLocation;

/**

• 单例初始化方法
  */
  • (PositionTool )shareInfo;
    /*
• 释放单例信息
  */
  • (void)freeInfo;

@end
.m方法的实现

• (PositionTool*)shareInfo {
  @synchronized(self) {

    if (_positionTool == nil) {
        _positionTool=[[PositionTool alloc] init];
        [email protected]"没有定位";
    }

  }
  return _positionTool;
  }
  /**

  • 释放单例实现
    */
• (void)freeInfo {
  if (_positionTool) {

    _positionTool = nil;

  }
  }

• (id)init {
  self=[super init];
  if (self) {

    _locationArr=[[NSMutableArray alloc] init];

  }
  return self;
  }
  /**

  • 代理回调添加和删除实现方法
    *
  • @param delegate 代理
    */
• (void)addDelegate:(id<PositionToolDelegate>)delegate {
  [_locationArr addObject:delegate];
  }
• (void)removeDelegate:(id)delegate {
  [_locationArr removeObject:delegate];
  }

/**

• 获取位置信息
  */

• (CLLocationCoordinate2D)getCenter {
  return [_locationManager location].coordinate;
  }
• (void)updateLocation {
  [_locationManager startUpdatingLocation];
  }
  

  pragma mark ========= 获取位置 ==========

• (void)getLocation {
  if ([CLLocationManager locationServicesEnabled]) {

    _locationManager=[[CLLocationManager alloc] init];
    _locationManager.delegate=self;
    //精度最高，耗电最大
    _locationManager.desiredAccuracy=kCLLocationAccuracyBest;
    _locationManager.distanceFilter = 200;
    [_locationManager startUpdatingLocation];
    if ([[[UIDevice currentDevice] systemVersion] floatValue] >=8.0) {
        [_locationManager requestAlwaysAuthorization];
    }

  }
  }

pragma mark - 调用地图代理方法

• (void)locationManager:(CLLocationManager )manager didFailWithError:(NSError )error {
  NSLog(@"%@",error);
  }

• (void)locationManager:(CLLocationManager *)manager didChangeAuthorizationStatus:(CLAuthorizationStatus)status {
  switch (status) {

    case kCLAuthorizationStatusNotDetermined:
        if ([_locationManager respondsToSelector:@selector(requestAlwaysAuthorization)]) {
            [_locationManager requestAlwaysAuthorization];
        }
        break;
  
    default:
        break;

  }
  }
  //获取经纬度

• (void)locationManager:(CLLocationManager )manager didUpdateLocations:(NSArray<CLLocation > )locations {
  CLLocation newLocation=locations[0];
  //CLLocationCoordinate2D oldCoordinate=newLocation.coordinate;
  //NSLog(@"旧的经度：%f,旧的纬度：%f",oldCoordinate.longitude,oldCoordinate.latitude);
  //NSLog(@"新的经度：%f,新的纬度：%f",newLocation.coordinate.longitude,newLocation.coordinate.latitude);
  self.latitude=newLocation.coordinate.latitude;
  self.longtitude=newLocation.coordinate.longitude;
  [manager stopUpdatingLocation];

  CLGeocoder geocoder=[[CLGeocoder alloc] init];
  [geocoder reverseGeocodeLocation:newLocation completionHandler:^(NSArray<CLPlacemark > _Nullable placemarks, NSError _Nullable error) {

    for (CLPlacemark *place in placemarks) {
        self.positionName=place.name;
        self.city=place.locality;
        self.area=place.subLocality;
  
        NSLog(@"%@",self.area);
    }
  
    for (id<PositionToolDelegate>delegate in _locationArr) {
        if (delegate && [delegate respondsToSelector:@selector(noticePositionChanged)]) {
            [delegate noticePositionChanged];
        }
    }

  }];

  for (id<PositionToolDelegate> delegate in _locationArr) {

    if (delegate && [delegate respondsToSelector:@selector(noticePositionChanged)]) {
        [delegate noticePositionChanged];
    }

  }
  }

-(void)locationManager:(CLLocationManager )manager didUpdateToLocation:(CLLocation )newLocation fromLocation:(CLLocation *)oldLocation {
NSLog(@"aaa%@", @"ok");
}
`
使用时候直接在使用到的地方加入
[[PositionTool shareInfo] getLocation];

文／Mikko（简书作者）
原文链接：http://www.jianshu.com/p/39228fd5da68
著作权归作者所有，转载请联系作者获得授权，并标注“简书作者”。