定位服务在iOS11系统上不能使用的问题_hbulid 在ios上无法启用定位功能

今天我突然发现以前维护的项目中开发的定位功能失效，显示“用户授权失败”。这个功能在当时是能成功实现的。于是我上网查找原因，网上说是因为苹果现在增加了一项新的隐私保护 NSLocationAlwaysAndWhenInUseUsageDescription ，并且原有的 NSLocationAlwaysUsageDescription 被降级为 NSLocationWhenInUseUsageDescription 。 所以在Xcode的控制台输出：

This app has attempted to access privacy-sensitive data without a usage description. The app's Info.plist must contain both NSLocationAlwaysAndWhenInUseUsageDescription and NSLocationWhenInUseUsageDescription keys with string values explaining to the user how the app uses this data

依照上述要求，我在项目的info.plist文件中加入

<key>NSLocationAlwaysAndWhenInUseUsageDescription</key>
    <string>是否允许开启定位以始终访问位置</string>
 
<key>NSLocationWhenInUseUsageDescription</key>
    <string>是否允许开启定位以在使用期间访问位置</string>

然后又重新实现了定位

/*
 iOS8以前:系统会自动申请用户位置权限
 iOS8之后(包含iOS8.0): 必须要程序员去申请用户的位置权限
*/
 
#import "ViewController.h"
#import <CoreLocation/CoreLocation.h>
 
@interface ViewController ()<CLLocationManagerDelegate>
 
@property (nonatomic,strong) CLLocationManager *locationManager;
 
@end
 
@implementation ViewController
 
- (void)viewDidLoad {
    [super viewDidLoad];
    //位置管理器常见属性
    //当用户移动了多长的距离之后,才更新用户位置,单位(米)
    self.locationManager.distanceFilter = 10;
    
    //定位精度,精度越高越费电
    self.locationManager.desiredAccuracy = kCLLocationAccuracyBestForNavigation;
    
    //extern const CLLocationAccuracy kCLLocationAccuracyBestForNavigation; 导航使用最好进度
    //extern const CLLocationAccuracy kCLLocationAccuracyBest;  最高精度
    //extern const CLLocationAccuracy kCLLocationAccuracyNearestTenMeters;  10M
    //extern const CLLocationAccuracy kCLLocationAccuracyHundredMeters; 100M
    //extern const CLLocationAccuracy kCLLocationAccuracyKilometer; 1000M
    //extern const CLLocationAccuracy kCLLocationAccuracyThreeKilometers; 3000M
    self.locationManager.activityType = CLActivityTypeFitness;
    
    //CLActivityTypeOther = 1,
    //CLActivityTypeAutomotiveNavigation,    // 汽车导航
    //CLActivityTypeFitness,                // 步行导航
    //CLActivityTypeOtherNavigation         // 其他导航,比如轮船,火车,飞机
 
    if ([UIDevice currentDevice].systemVersion.doubleValue >= 8.0) {
        //申请用户位置权限
        //无论应用在前台还是在后台都需要使用用户的位置信息
        [self.locationManager requestAlwaysAuthorization];
     }else{
            
        //开始更新用户位置
        [self.locationManager startUpdatingLocation];
    }
}
 
 
#pragma mark - CLLocationManagerDelegate
//当授权状态发生改变了就调用该代理方法
- (void)locationManager:(CLLocationManager *)manager didChangeAuthorizationStatus:(CLAuthorizationStatus)status{
    //当前请求到用户的权限后开始定位
    if (status == kCLAuthorizationStatusAuthorizedAlways) {
        
        [self.locationManager startUpdatingLocation];
    }else{
        
        NSLog(@"用户授权失败");
    }
}
 
//当更新用户位置的时候执行
- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray<CLLocation *> *)locations{
    //距离当前时间最近的那个位置是这个数组的最后一个元素
    CLLocation *location = locations.lastObject;
    CLLocationCoordinate2D coordinate = location.coordinate;
    NSLog(@"当前纬度:%f 当前经度:%f", coordinate.latitude, coordinate.longitude);
    
    //根据经纬度反向地理编译出地址信息
    CLGeocoder *geoCoder = [[CLGeocoder alloc] init];
    [geoCoder reverseGeocodeLocation:location completionHandler:^(NSArray *placemarks, NSError *error) {
        
        for (CLPlacemark *placemark in placemarks) {
            
            NSDictionary *address = [placemark addressDictionary];
            NSLog(@"当前地址:%@ %@ %@ %@ %@",address[@"Country"],address[@"City"],address[@"SubLocality"],address[@"Street"],address[@"Name"]);
        }
    }];
}
 
 
//懒加载
- (CLLocationManager *)locationManager{
    if (_locationManager == nil) {
        _locationManager = [[CLLocationManager alloc] init];
        _locationManager.delegate = self;
    }
    
    return _locationManager;
}
 
 
@end

Xcode控制台输出