IOS開發—App 在 IOS 8 的simulator運行時，定位卡死bug解決

在 iOS 8 上編譯會出現如下 log ： 

Trying to start MapKit location updates without prompting for location authorization. Must call -[CLLocationManager requestWhenInUseAuthorization] or -[CLLocationManager requestAlwaysAuthorization] first.

經搜索獲得解決方法以下：

一、修改info.plist：

    新增key值爲NSLocationWhenInUseUsageDescription 或 NSLocationAlwaysUsageDescription（這裏，我將兩個都加了進去），value能夠爲空，也能夠設置YES，不過我得問題仍是不能解決，最終仍是找到得了問題所在，就是info.plist中還須要包含Supported interface orientations 這個Array字段。而後運行就解決了。 

二、修改代碼： 

    在調用方法startUpdatingLocation的前面加上一句 

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if ([locationManager respondsToSelector:@selector(requestWhenInUseAuthorization)]) {      [locationManager requestWhenInUseAuthorization]; }

三、博客原文修改方法： 

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locationManager = [[CLLocationManager alloc] init];          locationManager.delegate = self;          locationManager.desiredAccuracy=kCLLocationAccuracyBest;          if ([locationManager respondsToSelector:@selector(requestWhenInUseAuthorization)]) {              [locationManager requestWhenInUseAuthorization];          }          [locationManager startUpdatingLocation];

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- ( 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 如下，因為 kCLAuthorizationStatusAuthorized 在 iOS 8 徹底不能使用。 

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CLAuthorizationStatus status = [CLLocationManager authorizationStatus];            if (status == kCLAuthorizationStatusAuthorizedWhenInUse || status == kCLAuthorizationStatusAuthorized) {        // 開始定位   } else {        // 預示警告 }