一、导入CoreLocation.framework 二、#import <CoreLocation/CoreLocation.h>
三、声明代理 <CLLocationManagerDelegate>
四、代码实现
1、声明
- CLLocationManager *locationManager;//定义Manager
- // 判断定位操作是否被允许
- if([CLLocationManager locationServicesEnabled]) {
- CLLocationManager *locationManager = [[[CLLocationManager alloc] init] autorelease];
- self.locationManager.delegate = self;
- }else {
- //提示用户无法进行定位操作
- }
- // 开始定位
- [locationManager startUpdatingLocation];
复制代码 2、更新位置后代理方法,iOS6.0一下的方法
- - (void)locationManager:(CLLocationManager *)manager
- didUpdateToLocation:(CLLocation *)newLocation
- fromLocation:(CLLocation *)oldLocation {
- //latitude和lontitude均为NSString型变量
- //纬度
- self.latitude = [NSString stringWithFormat:@"%.4f", newLocation.coordinate.latitude];
- //经度
- self.longitude = [NSString stringWithFormat:@"%.4f", newLocation.coordinate.longitude];
-
- }
复制代码 3、iOS6.0以上苹果的推荐方法
- -(void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations
- {
- //此处locations存储了持续更新的位置坐标值,取最后一个值为最新位置,如果不想让其持续更新位置,则在此方法中获取到一个值之后让locationManager stopUpdatingLocation
- CLLocation *currentLocation = [locations lastObject];
-
- CLLocationCoordinate2D coor = currentLocation.coordinate;
- self.latitude = coor.latitude;
- self.longitude = coor.longitude;
-
- //[self.locationManager stopUpdatingLocation];
-
- }
复制代码 4、更新失败的方法
- - (void)locationManager:(CLLocationManager *)manager
- didFailWithError:(NSError *)error {
-
- if (error.code == kCLErrorDenied) {
- // 提示用户出错原因,可按住Option键点击 KCLErrorDenied的查看更多出错信息,可打印error.code值查找原因所在
- }
- }
复制代码 五、根据两点坐标计算两点之间的距离,此方法为苹果自带方法,亲测速度比高德API速度快很多,但是数据与高德API得到的不一样,准确度本人未能证实
- //第一个坐标
- CLLocation *current=[[CLLocation alloc] initWithLatitude:32.178722 longitude:119.508619];
- //第二个坐标
- CLLocation *before=[[CLLocation alloc] initWithLatitude:32.206340 longitude:119.425600];
- // 计算距离
- CLLocationDistance meters=[current distanceFromLocation:before];
复制代码
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