iOS地图定位使用几个小功能（刚刚）

来源：互联网发布：上海二二一数据怎么样编辑：程序博客网时间：2024/05/22 05:31

iOS系统自带的定位服务可以实现很多需求。比如：获取当前经纬度，获取当前位置信息等等。

获取当前经纬度

首先导入#import <CoreLocation/CoreLocation.h>，定义CLLocationManager的实例，实现CLLocationManagerDelegate。

@interface ViewController ()<CLLocationManagerDelegate>{    CLLocationManager *_locationManager;}@end

开始定位的方法：

- (void)startLocating{    if([CLLocationManager locationServicesEnabled])    {        _locationManager = [[CLLocationManager alloc] init];        //设置定位的精度        [_locationManager setDesiredAccuracy:kCLLocationAccuracyBest];        _locationManager.distanceFilter = 100.0f;        _locationManager.delegate = self;        if ([[[UIDevice currentDevice] systemVersion] floatValue] > 8.0)        {            [_locationManager requestAlwaysAuthorization];            [_locationManager requestWhenInUseAuthorization];        }        //开始实时定位        [_locationManager startUpdatingLocation];    }}

实现代理方法：

-(void)locationManager:(CLLocationManager *)manager didChangeAuthorizationStatus:(CLAuthorizationStatus)status{    NSLog(@"Longitude = %f", manager.location.coordinate.longitude);    NSLog(@"Latitude = %f", manager.location.coordinate.latitude);    [_locationManager stopUpdatingLocation];}

获取当前位置信息

在上面的代理方法中

-(void)locationManager:(CLLocationManager *)manager didChangeAuthorizationStatus:(CLAuthorizationStatus)status{    NSLog(@"Longitude = %f", manager.location.coordinate.longitude);    NSLog(@"Latitude = %f", manager.location.coordinate.latitude);    [_locationManager stopUpdatingLocation];    CLGeocoder * geoCoder = [[CLGeocoder alloc] init];    [geoCoder reverseGeocodeLocation:manager.location completionHandler:^(NSArray *placemarks, NSError *error) {        for (CLPlacemark * placemark in placemarks) {            NSDictionary *test = [placemark addressDictionary];            //  Country(国家)  State(城市)  SubLocality(区)            NSLog(@"%@", [test objectForKey:@"Country"]);            NSLog(@"%@", [test objectForKey:@"State"]);            NSLog(@"%@", [test objectForKey:@"SubLocality"]);            NSLog(@"%@", [test objectForKey:@"Street"]);        }    }];}

这样就很简单获取了当前位置的详细信息。

获取某一个地点的经纬度

- (void)getLongitudeAndLatitudeWithCity:(NSString *)city{    //city可以为中文    NSString *oreillyAddress = city;    CLGeocoder *myGeocoder = [[CLGeocoder alloc] init];    [myGeocoder geocodeAddressString:oreillyAddress completionHandler:^(NSArray *placemarks, NSError *error) {        if ([placemarks count] > 0 && error == nil)        {            NSLog(@"Found %lu placemark(s).", (unsigned long)[placemarks count]);            CLPlacemark *firstPlacemark = [placemarks objectAtIndex:0];            NSLog(@"Longitude = %f", firstPlacemark.location.coordinate.longitude);            NSLog(@"Latitude = %f", firstPlacemark.location.coordinate.latitude);        }        else if ([placemarks count] == 0 && error == nil)        {            NSLog(@"Found no placemarks.");        }        else if (error != nil)        {            NSLog(@"An error occurred = %@", error);        }    }];}

计算两个地点之间的距离

- (double)distanceByLongitude:(double)longitude1 latitude:(double)latitude1 longitude:(double)longitude2 latitude:(double)latitude2{    CLLocation* curLocation = [[CLLocation alloc] initWithLatitude:latitude1 longitude:longitude1];    CLLocation* otherLocation = [[CLLocation alloc] initWithLatitude:latitude2 longitude:longitude2];    double distance  = [curLocation distanceFromLocation:otherLocation];//单位是m    return distance;}

首先我们可以用上面的getLongitudeAndLatitudeWithCity方法获取某一个地点的经纬度。比如我们获取北京和上海的经纬度分别为：北京Longitude = 116.405285，Latitude = 39.904989 上海Longitude = 121.472644， Latitude = 31.231706, 那么北京和上海之间的距离就是：

double distance = [self distanceByLongitude:116.405285 latitude:39.904989 longitude:121.472644 latitude:31.231706];NSLog(@"Latitude = %f", distance);

计算的是大概的距离，可能没有那么精准。输入结果为：

distance = 1066449.749194

代码下载地址:MapDistanceMaster

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