CLLocationManager 在ios8定位功能实现

1 导入框架 CoreLocation.framework

2 导入头文件 

#import <CoreLocation/CoreLocation.h>

3 遵守代理

<CLLocationManagerDelegate>

4 设置全局属性

@property (strong, nonatomic) CLLocationManager* locationManager;

5 viewdidload里面 

[self startLocation];

//开始定位
-(void)startLocation
{
    self.locationManager = [[CLLocationManager alloc] init];
    self.locationManager.delegate = self;
    self.locationManager.desiredAccuracy = kCLLocationAccuracyBest;
    self.locationManager.distanceFilter = 10.0f;
    
    if ([[[UIDevice currentDevice] systemVersion] doubleValue] > 8.0)
    {
        //设置定位权限 仅ios8有意义
        // [self.locationManager requestWhenInUseAuthorization];// 前台定位
        
          [self.locationManager requestAlwaysAuthorization];// 前后台同时定位
    }
    [self.locationManager startUpdatingLocation];
}

6 info.plist增加字段，（ios8 必须要）一般无法弹出获取定位权限的alert的原因就在这

　　　NSLocationWhenInUseUsageDescription   //允许在前台获取GPS的描述
　　　NSLocationAlwaysUsageDescription   //允许在前、后台获取GPS的描述 

此处设置必须和第5步的定位权限对应上，如果是前台定位，就在plist里面NSLocationWhenInUseUsageDescription

并不是 俩项都必须要加

效果图：

7 定位成功后的代理方法

//定位代理经纬度回调
-(void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation {
    
    [self.locationManager stopUpdatingLocation];
    //    NSLog(@"location ok");
    //
    //    NSLog(@"%@",[NSString stringWithFormat:@"经度:%3.5f\n纬度:%3.5f",newLocation.coordinate.latitude,newLocation.coordinate.longitude]);
    
    CLGeocoder * geoCoder = [[CLGeocoder alloc] init];
    [geoCoder reverseGeocodeLocation:newLocation completionHandler:^(NSArray *placemarks, NSError *error) {
        for (CLPlacemark * placemark in placemarks) {
            
            NSDictionary *test = [placemark addressDictionary];
            //  Country(国家)  State(城市)  SubLocality(区)
            self.title = [test objectForKey:@"City"];
        }
    }];
    
}

定位失败的回调：

/**
 *  1 定位失败的回调
 *  2 或者是用户点击了不允许定位的时候
 */
- (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error
{
    if ([error code] == kCLErrorDenied)
    {
        //访问被拒绝
    }
    if ([error code] == kCLErrorLocationUnknown) {
        //无法获取位置信息
    }
}