简短代码实现原生定位

1、首先在info.plist文件中加入权限声明。请求用户获取定位能力

屏幕快照 2017-04-12 上午8.58.56.png

2、大体思路。

定位需要用户设备打开定位功能。这个可以根据这句代码判断。[CLLocationManager locationServicesEnables]如果为真则设备开启定位功能，否则没有开启。
判断用户是否为该应用设置允许定位可以根据CLLocationManagerDelegate的代理方法判断。具体见下面代码

#import 
@class LocationManager;
@protocol LocationManagerDelegate 

-(void)locationManager:(LocationManager *)locationManager didGotLocation:(NSString *)location;

@end

@interface LocationManager : NSObject

@property (nonatomic, assign) id delegate;

/**
* 单例模式实例化对象
*/
+(LocationManager *)sharedInstance;
/**
* 开始定位
*/
-(void)autoLocate;
@end


#import "LocationManager.h"
#import 

@interface LocationManager()
@property (nonatomic, strong) CLLocationManager *locationManager;
@end

@implementation LocationManager

+(LocationManager *)sharedInstance{
static LocationManager *instance = nil;
static dispatch_once_t predict;
dispatch_once(&predict, ^{
instance = [[self alloc] init];
});
return instance;
}

#pragma mark - private method
-(void)autoLocate{
if ([CLLocationManager locationServicesEnabled]) {
self.locationManager = [[CLLocationManager alloc] init];
self.locationManager.delegate = self;
[self.locationManager startUpdatingLocation];
if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 8.0){
[self.locationManager requestWhenInUseAuthorization];
}
}
}


#pragma mark - CLLocationManagerDelegate

-(void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error{
UIAlertController *alertVC = [UIAlertController alertControllerWithTitle:@"打开定位开关" message:@"定位服务未开启，请进入系统【设置】>【隐私】>【定位服务】中打开开关，并允许母子健康手册使用定位服务" preferredStyle:UIAlertControllerStyleAlert];
UIAlertAction * ok = [UIAlertAction actionWithTitle:@"打开定位" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
//打开该App的权限设置
NSURL *settingsURL = [NSURL URLWithString:UIApplicationOpenSettingsURLString];
[[UIApplication sharedApplication] openURL:settingsURL];
}];
UIAlertAction * cancel = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) {
}];
[alertVC addAction:cancel];
[alertVC addAction:ok];
[[UIApplication sharedApplication].keyWindow.rootViewController presentViewController:alertVC animated:YES completion:nil];
}

-(void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations{
[manager stopUpdatingLocation];
CLLocation *currentLocation = [locations lastObject];
CLGeocoder *geocoder = [[CLGeocoder alloc] init];
[geocoder reverseGeocodeLocation:currentLocation completionHandler:^(NSArray * _Nullable placemarks, NSError * _Nullable error) {
CLPlacemark *place = placemarks[0];
if (self.delegate && [self.delegate respondsToSelector:@selector(locationManager:didGotLocation:)]) {
[self.delegate locationManager:self didGotLocation:place.locality];
}
}];
}

@end

How to use###

1、在你的文件中导入#import "LocationManager.h"
2、遵循LocationManagerDelegate协议
3、定义属性。@property (nonatomic, strong) LocationManager *locationManager;
4、触发定位事件

//自动定位
-(void)autoLocate{
self.locationManager = [LocationManager sharedInstance];
self.locationManager.delegate = self;
[self.locationManager autoLocate];
}

5、在代理方法中拿到定位城市，更新UI

#pragma mark - LocationManagerDelegate
-(void)locationManager:(LocationManager *)locationManager didGotLocation:(NSString *)location{
self.conditionView.cityName = location;
}

此外，想看完整demo的话，传送门项目地址