1.CoreLocation 使用,获取当前位置

1.

ios7只要开始定位,系统就会自动要求你对应用程序授权

ios8之后,必须要代码中实现要求用户对应用程序授权 ,在plist中添加以下两个属性

NSLocationWhenInUseDescription，允许在前台获取GPS的描述

NSLocationAlwaysUsageDescription，允许在后台获取GPS的描述

2,代码

#import "ViewController.h"

#import <CoreLocation/CoreLocation.h>

@interface ViewController ()<CLLocationManagerDelegate>

@property(nonatomic,strong)CLLocationManager*manger;

@end

@implementation ViewController

-(CLLocationManager*)manger

{

if (_manger==nil) {

_manger=[[CLLocationManager alloc]init];

}

return _manger;

}

- (void)viewDidLoad {

[super viewDidLoad];

self.manger.delegate=self;

if ([[UIDevice currentDevice].systemVersion floatValue]>8.0) {

[self.manger requestAlwaysAuthorization];//后台运行的时候执行获取位置信息

//[self.manger requestWhenInUseAuthorization];//前台执行的时候获取位置信息

}

else

{

[self.manger startUpdatingLocation];

}

}

//授权状态改变的时候调用

-(void)locationManager:(CLLocationManager *)manager didChangeAuthorizationStatus:(CLAuthorizationStatus)status

{

if (status == kCLAuthorizationStatusNotDetermined) {

NSLog(@"等待用户授权");

}else if (status == kCLAuthorizationStatusAuthorizedAlways ||

status == kCLAuthorizationStatusAuthorizedWhenInUse)

{

NSLog(@"授权成功");

// 开始定位

[self.manger startUpdatingLocation];

}

else

{

NSLog(@"授权失败");

}

}

-(void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations

{

//如果只需要获取一次,可以获取位置之后就停止

[self.manger stopUpdatingLocation];

CLLocation *location=[locations lastObject];

NSLog(@"经度=%f,维度=%f   速度=%f  ",location.coordinate.latitude,location.coordinate.longitude,location.speed);

}

@end