在 iOS 8 上编译会出现以下 log ：
Trying to start MapKit location updates without prompting for location authorization. Must call -[CLLocationManager requestWhenInUseAuthorization] or -[CLLocationManager requestAlwaysAuthorization] first.
经搜索得到解决方法如下：
1、修改info.plist：
新增key值为NSLocationWhenInUseUsageDescription 或 NSLocationAlwaysUsageDescription（这里，我将两个都加了进去），value可以为空，也可以设置YES，不过我得问题还是不能解决，最终还是找到得了问题所在，就是info.plist中还需要包含Supported interface orientations 这个Array字段。然后运行就解决了。
2、修改代码：
在调用方法startUpdatingLocation的前面加上一句
| 1 2 3 | if ([locationManager respondsToSelector:@selector(requestWhenInUseAuthorization)]) { [locationManager requestWhenInUseAuthorization]; } |
3、博客原文修改方法：
| 1 2 3 4 5 6 7 | locationManager = [[CLLocationManager alloc] init]; locationManager.delegate = self; locationManager.desiredAccuracy=kCLLocationAccuracyBest; if ([locationManager respondsToSelector:@selector(requestWhenInUseAuthorization)]) { [locationManager requestWhenInUseAuthorization]; } [locationManager startUpdatingLocation]; |
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 | - ( void )locationManager:(CLLocationManager *)manager didChangeAuthorizationStatus:(CLAuthorizationStatus)status { if ( ([locationManager respondsToSelector:@selector(requestWhenInUseAuthorization)] && status != kCLAuthorizationStatusNotDetermined && status != kCLAuthorizationStatusAuthorizedWhenInUse) || (![locationManager respondsToSelector:@selector(requestWhenInUseAuthorization)] && status != kCLAuthorizationStatusNotDetermined && status != kCLAuthorizationStatusAuthorized) ) { NSString *message = @ "您的手機目前並未開啟定位服務，如欲開啟定位服務，請至設定->隱私->定位服務，開啟本程式的定位服務功能" ; UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@ "無法定位" message:message delegate:nil cancelButtonTitle:@ "確定" otherButtonTitles: nil]; [alertView show]; } else { [locationManager startUpdatingLocation]; } } |
上面那行是 iOS 8 以上，第二行是 iOS 7 以下，因為 kCLAuthorizationStatusAuthorized 在 iOS 8 完全不能使用。
| 1 2 3 4 5 6 7 8 9 10 | CLAuthorizationStatus status = [CLLocationManager authorizationStatus]; if (status == kCLAuthorizationStatusAuthorizedWhenInUse || status == kCLAuthorizationStatusAuthorized) { // 开始定位 } else { // 预示警告 } |