核心位置没有响应

Question

当我输入以下代码并在模拟器上运行并将位置设置为 "City Run" 时，它不会记录任何内容。不过我不知道我做错了什么。

.h

#import <CoreLocation/CoreLocation.h>

@interface ViewController : UIViewController <UITextFieldDelegate,CLLocationManagerDelegate> {
    CLLocationManager *locMgr;
}
@property (nonatomic, retain) CLLocationManager *locMgr;
@property NSInteger speed;

.m

@synthesize locMgr;
- (void)viewDidLoad {
    [super viewDidLoad];
    self.locMgr = [[CLLocationManager alloc] init];
    self.locMgr.delegate = self;
    self.locMgr.desiredAccuracy = kCLLocationAccuracyBest;
    [self.locMgr startUpdatingLocation];
}
- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation {
    self.speed = roundf([newLocation speed]);
    NSLog(@"speed: %ld", (long)self.speed);
}

你看到我遗漏了什么吗？

Answer 1

尝试将 NSLocationWhenInUseUsageDescription 键添加到您的 info.plist

Answer 2

您需要通过以下任一方法请求授权才能使用定位服务：

[self.locMgr requestAlwaysAuthorization];

或

[self.locMgr requestWhenInUseAuthorization];

核心位置没有响应

Core Location not responding

ios

objective-c

location

core-location