升級 iOS8 PhoneGap GeoLocation 無法開啟GPS問題。

今天遇到，我的iPhone升級為iOS8以後，GPS並無法正常被開啟。在網路上找到一個方法，分享給大家試試：

使用PhoneGap版本:2.9.0。

參考網址：

http://forum.ionicframework.com/t/ios-8-geo-location-permissions-not-appearing-heres-how-to-fix/9822

修改檔案路徑：

CordovaLib.xcodeproj/Classes/Commands/CDVLocation.m

請在CDVLocation.m加入以下「紅色」部份的Code

- (BOOL)isAuthorized
{
    BOOL authorizationStatusClassPropertyAvailable = [CLLocationManager respondsToSelector:@selector(authorizationStatus)]; // iOS 4.2+

    if (authorizationStatusClassPropertyAvailable) {
        NSUInteger authStatus = [CLLocationManager authorizationStatus];

#ifdef __IPHONE_8_0
        if ([self.locationManager respondsToSelector:@selector(requestWhenInUseAuthorization)]) {  //iOS 8.0+
            return (authStatus == kCLAuthorizationStatusAuthorizedWhenInUse) || (authStatus == kCLAuthorizationStatusAuthorizedAlways) || (authStatus == kCLAuthorizationStatusNotDetermined);
        }
#endif

        return (authStatus == kCLAuthorizationStatusAuthorized) || (authStatus == kCLAuthorizationStatusNotDetermined);
    }

    // by default, assume YES (for iOS < 4.2)
    return YES;
}

#ifdef __IPHONE_8_0
    NSUInteger code = [CLLocationManager authorizationStatus];
    if (code == kCLAuthorizationStatusNotDetermined && ([self.locationManager respondsToSelector:@selector(requestAlwaysAuthorization)] || [self.locationManager respondsToSelector:@selector(requestWhenInUseAuthorization)])) { //iOS8+
        __highAccuracyEnabled = enableHighAccuracy;
        if([[NSBundle mainBundle] objectForInfoDictionaryKey:@"NSLocationAlwaysUsageDescription"]){
            [self.locationManager requestAlwaysAuthorization];
        } else if([[NSBundle mainBundle] objectForInfoDictionaryKey:@"NSLocationWhenInUseUsageDescription"]) {
            [self.locationManager  requestWhenInUseAuthorization];
        } else {
            NSLog(@"[Warning] No NSLocationAlwaysUsageDescription or NSLocationWhenInUseUsageDescription key is defined in the Info.plist file.");
        }
        return;
    }
#endif


    // Tell the location manager to start notifying us of location updates. We
    // first stop, and then start the updating to ensure we get at least one
    // update, even if our location did not change.
    [self.locationManager stopUpdatingLocation];
    [self.locationManager startUpdatingLocation];

//iOS8+
-(void)locationManager:(CLLocationManager *)manager didChangeAuthorizationStatus:(CLAuthorizationStatus)status
{
    if(!__locationStarted){
        [self startLocation:__highAccuracyEnabled];
    }
}

在檔案找，找到 檔案名稱-Info.plist 檔，請用「文件編輯器」打開。
加入以下Code

<key>NSLocationAlwaysUsageDescription</key>
<String>Permissions Message for App even when not in use</String>
<key>NSLocationWhenInUseUsageDescription</key>
<String>Permissions Message for App when in use</String>

如下圖：