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
<key>NSLocationAlwaysAndWhenInUseUsageDescription</key> <string>App需要您的同意,才能始终访问位置</string> <key>NSLocationWhenInUseUsageDescription</key> <string>App需要您的同意,才能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);
}
/// 懒加载
- (CLLocationManager *)locationManager
{
if (_locationManager == nil) {
_locationManager = [[CLLocationManager alloc] init];
_locationManager.delegate = self;
}
return _locationManager;
}
@end
Xcode控制台输出
