这几天项目中需要GPS计算汽车的速度和行驶距离,这里简单记录一下使用过程
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1 和平常使用地图一样,在Info.plist中添加位置请求
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2 在
viewdidLoad
中初始化locationManager_locationManager = [[CLLocationManager alloc]init]; _locationManager.delegate = self; _locationManager.desiredAccuracy = kCLLocationAccuracyBest; [_locationManager requestAlwaysAuthorization]; [_locationManager startUpdatingLocation]; [_locationManager location];
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3 实现代理方法
-(void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations
if (_startingLocation == nil) { _startingLocation = (CLLocation *)[locations firstObject]; } CLLocation *currentLocation = (CLLocation *)[locations lastObject]; _speed = currentLocation.speed; _didtance = [currentLocation distanceFromLocation:_startingLocation ];
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4 以上即可利用GPS获取行车速度和距离