iOS8 CLLocationManager初步使用

最近在ios8.0使用CLLocationManager定位服务,发现老不能定位,查看设置菜单中的项也是处于未知状态.想起之前都有一个弹出框提示用户是否允许定位,这次一直没有出现了.原来ios8.0下的定位服务需要申请授权了. 具体代码如下:

if ([CLLocationManager locationServicesEnabled]) {

self.locationManager = [[CLLocationManager alloc] init];

_locationManager.delegate = self;

_locationManager.desiredAccuracy = kCLLocationAccuracyBest; //控制定位精度,越高耗电量越大。

_locationManager.distanceFilter = 100; //控制定位服务更新频率。单位是“米”

[_locationManager startUpdatingLocation];

//在ios 8.0下要授权

if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 8.0)

[_locationManager requestWhenInUseAuthorization];  //调用了这句,就会弹出允许框了.

}

注意:

在Info.plist文件还要加上NSLocationWhenInUseUsageDescription这个key,Value可以为空,

#pragma mark - CLLocationManagerDelegate

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

CLLocation * currLocation = [locations lastObject];

NSLog(@"%@",[NSString stringWithFormat:@"%.3f",currLocation.coordinate.latitude]);

NSLog(@"%@",[NSString stringWithFormat:@"%.3f",currLocation.coordinate.longitude]);

}