iOS CLLocationManager 定位

今天写个定位，本来很简单，但是在填写plist时，通过系统提示，只能看到NSLocationUsageDescription项目，根本不提示

（1）NSLocationAlwaysUsageDescription
（2）NSLocationWhenInUseUsageDescription
这2个项目，所以我就用了NSLocationUsageDescription，结果就不能定位了。其实NSLocationUsageDescription这个项目在ios8就不用了！
 
下面简单地说一下用法：

    _locationManager = [[CLLocationManager alloc] init];
    _locationManager.delegate = self;
 
    _locationManager.distanceFilter=kCLDistanceFilterNone;
 
    _locationManager.desiredAccuracy = kCLLocationAccuracyBestForNavigation;
 
    [_locationManager requestWhenInUseAuthorization];
 
    [_locationManager requestLocation];
    

下面是取到gps后，解析出所在国家代码

- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray<CLLocation *> *)locations{
    NSLog(@"locations is %@",locations);
 
    CLGeocoder *geocoder = [[CLGeocoder alloc] init];
 
    [geocoder reverseGeocodeLocation:[locations lastObject] completionHandler:^(NSArray *placemarks, NSError *error){
 
        if(error != nil)
 
        {
 
            NSLog(@"CLGeocoder error :%@ ",error);
 
        }
 
        else//if we can get place info ,we set it into meteData dic with kCGImagePropertyExifCameraOwnerName key
 
        {
 
            if(placemarks.count > )
 
            {
 
                CLPlacemark *placemark = [placemarks objectAtIndex:];
 
                NSString *countCodeStr = placemark.ISOcountryCode;
 
                NSLog(@"countCodeStr is %@",countCodeStr);
            }
 
        }
 
    }];
}