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

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

三、博客原文修改方法：

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

- (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。

CLAuthorizationStatus status = [CLLocationManager authorizationStatus];
    
    if (status == kCLAuthorizationStatusAuthorizedWhenInUse || status == kCLAuthorizationStatusAuthorized) {

    // 開始定位

}else {

    // 顯示警告
}