iOS8以前使用CoreLocation定位
1、首先定义一个全局的变量用来记录CLLocationManager对象,引入CoreLocation.framework使用#import@property (nonatomic, strong) CLLocationManager *locationManager;
2、初始化CLLocationManager并开始定位
self.locationManager = [[CLLocationManager alloc]init];
_locationManager.delegate = self;
_locationManager.desiredAccuracy = kCLLocationAccuracyBest;
_locationManager.distanceFilter = 10;
[_locationManager startUpdatingLocation];
3、实现CLLocationManagerDelegate的代理方法
(1)获取到位置数据,返回的是一个CLLocation的数组,一般使用其中的一个
- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations
{
CLLocation *currLocation = [locations lastObject];
NSLog(@"经度=%f 纬度=%f 高度=%f", currLocation.coordinate.latitude, currLocation.coordinate.longitude, currLocation.altitude);
}
(2)获取用户位置数据失败的回调方法,在此通知用户
- (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
}
}
4、在viewWillDisappear关闭定位
- (void)viewWillDisappear:(BOOL)animated
{
[super viewWillDisappear:animated];
[_locationManager stopUpdatingLocation];
}
iOS8中使用CoreLocation定位
1、在使用CoreLocation前需要调用如下函数【iOS8专用】:
iOS8对定位进行了一些修改,其中包括定位授权的方法,CLLocationManager增加了下面的两个方法:
(1)始终允许访问位置信息
- (void)requestAlwaysAuthorization;
(2)使用应用程序期间允许访问位置数据
- (void)requestWhenInUseAuthorization;
示例如下:
self.locationManager = [[CLLocationManager alloc]init];
_locationManager.delegate = self;
_locationManager.desiredAccuracy = kCLLocationAccuracyBest;
_locationManager.distanceFilter = 10;
[_locationManager requestAlwaysAuthorization];//添加这句
[_locationManager startUpdatingLocation];
2、在Info.plist文件中添加如下配置:
(1)NSLocationAlwaysUsageDescription
(2)NSLocationWhenInUseUsageDescription
这两个键的值就是授权alert的描述,示例配置如下[勾选Show Raw Keys/Values后进行添加]: