iOS原生定位

1、导入框架

CoreLocation.framework

2、添加头文件

#import <CoreLocation/CoreLocation.h>

3、声明和代理

@interface ViewController ()<CLLocationManagerDelegate>
@property (nonatomic,strong)CLLocationManager *locationManager;
@end

4、初始化

_locationManager = [[CLLocationManager alloc] init];
_locationManager.delegate = self;
_locationManager.desiredAccuracy = kCLLocationAccuracyBest;
_locationManager.distanceFilter = kCLDistanceFilterNone;

5、开始定位

- (void)startLocation {
    if (IOS8) {
        // 由于iOS8中定位的授权机制改变, 需要进行手动授权
        [_locationManager requestAlwaysAuthorization];
        [_locationManager requestWhenInUseAuthorization];
    }
    [_locationManager startUpdatingLocation];
}

6、代理回调

- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation {
    
    NSLog(@"%@",[NSString stringWithFormat:@"经度:%3.5f\n纬度:%3.5f",newLocation.coordinate.latitude,newLocation.coordinate.longitude]);
    
    // 获取当前所在的城市名
    CLGeocoder *geocoder = [[CLGeocoder alloc] init];
    //根据经纬度反向地理编译出地址信息
    [geocoder reverseGeocodeLocation:newLocation completionHandler:^(NSArray *array, NSError *error)
     {
         if (array.count > 0) {
             
             CLPlacemark *placemark = [array objectAtIndex:0];
             
             //获取城市
             NSString *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);
             NSLog(@"dic = %@",placemark.addressDictionary);

         } else if (error == nil && [array count] == 0) {
             
             NSLog(@"No results were returned.");
             
         } else if (error != nil) {
             
             NSLog(@"An error occurred = %@", error);
             
         }
                  
     }];
    
    //系统会一直更新数据，直到选择停止更新，因为我们只需要获得一次经纬度即可，所以获取之后就停止更新
    [manager stopUpdatingLocation];
    
}

- (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error {
    
    [manager stopUpdatingLocation];

    NSString *errorString;
    NSString *alterTitle;
    NSLog(@"Error: %@",[error localizedDescription]);

    switch([error code]) {
        case kCLErrorDenied:
            //Access denied by user
            errorString = @"请在系统设置中开启定位服务\n(设置>隐私>定位服务)";
            alterTitle  = @"定位服务未开启";
            break;
        case kCLErrorNetwork:
            //Probably temporary...
            errorString = @"网络未开启,请检查网络设置";
            alterTitle  = @"提示";
            break;
        default:
            errorString = @"发生位置错误";
            alterTitle  = @"提示";
            break;
    }
    
    UIAlertView *locationFailAlert = [[UIAlertView alloc] initWithTitle:alterTitle message:errorString delegate:self cancelButtonTitle:@"知道了" otherButtonTitles:nil, nil];
    [locationFailAlert show];
}

注意事项：

1、用户隐私的保护

在iOS8中，定位服务发生了变化，需要用户授权。

在工程info.plist文件中添加下面值：

<key>NSLocationUsageDescription</key>
<string>需要您的同意,才能访问位置</string>
<key>NSLocationWhenInUseUsageDescription</key>
<string>需要您的同意,才能在使用期间访问位置</string>
<key>NSLocationAlwaysUsageDescription</key>
<string>需要您的同意,才能始终访问位置</string>

2、获取应用当前的定位服务状态

// 确定用户的位置服务是否启用  
[CLLocationManager locationServicesEnabled]

// 位置服务是在设置中禁用 
if ([CLLocationManager authorizationStatus] == kCLAuthorizationStatusDenied) {

}