Ios 获取当前位置时遇到的问题

我想获取设备的当前位置。代码正常工作。如果用户未更改位置服务的应用程序授权状态，则会给出位置。我还可以检查用户是否拒绝了位置服务的权限

问题是当用户取消应用程序使用位置服务的授权，然后再次授权。在本例中，在此之后，如果我尝试获取位置，它会给出

nil

，尽管它调用了

- (void)locationManager:(CLLocationManager *)manager didChangeAuthorizationStatus:(CLAuthorizationStatus)status

状态为

3

的委托方法，即

kCLAuthorizationStatusAuthorized

获取当前位置的代码：

CLLocation * location = self.locationManager.location;

- (void)locationManager:(CLLocationManager *)manager didChangeAuthorizationStatus:(CLAuthorizationStatus)status
{
    DLog(@"Location authorization changed : %d", status);

    // If user has denied permission for location service
    if (status == kCLAuthorizationStatusDenied)
    {
        DLog(@"Location service denied.");

        // If authorization status changed method is already called, then SDK will not call again on same object.
        // Thus, set CLLocationManager object to nil so that next time we try to get location, it will create a new object,
        // and that will send message about authorization status changed.
        self.locationManager.delegate = nil;
        self.locationManager = nil;
    }
    else if (status == kCLAuthorizationStatusNotDetermined)
    {
        // If authorization status changed method is already called, then SDK will not call again on same object.
        // Thus, set CLLocationManager object to nil so that next time we try to get location, it will create a new object,
        // and that will send message about authorization status changed.
        self.locationManager.delegate = nil;
        self.locationManager = nil;
    }
    else if (status == kCLAuthorizationStatusAuthorized)
    {

    }
}

Getter方法：

- (CLLocationManager *)locationManager
{
    if (!locationManager)
    {
        locationManager = [[CLLocationManager alloc] init];
        locationManager.delegate = self;
    }

    return locationManager;
}

CLLocationManager委托方法：

CLLocation * location = self.locationManager.location;

- (void)locationManager:(CLLocationManager *)manager didChangeAuthorizationStatus:(CLAuthorizationStatus)status
{
    DLog(@"Location authorization changed : %d", status);

    // If user has denied permission for location service
    if (status == kCLAuthorizationStatusDenied)
    {
        DLog(@"Location service denied.");

        // If authorization status changed method is already called, then SDK will not call again on same object.
        // Thus, set CLLocationManager object to nil so that next time we try to get location, it will create a new object,
        // and that will send message about authorization status changed.
        self.locationManager.delegate = nil;
        self.locationManager = nil;
    }
    else if (status == kCLAuthorizationStatusNotDetermined)
    {
        // If authorization status changed method is already called, then SDK will not call again on same object.
        // Thus, set CLLocationManager object to nil so that next time we try to get location, it will create a new object,
        // and that will send message about authorization status changed.
        self.locationManager.delegate = nil;
        self.locationManager = nil;
    }
    else if (status == kCLAuthorizationStatusAuthorized)
    {

    }
}

---

你知道吗？

self.locationManager.location

是

nil

，因为你从未开始更新位置

apple文档中说明了locationManager的

位置

属性：

如果从未使用过位置数据，则此属性的值为零 找回了

因此，您需要以某种方式更新您的iPhone位置

通常这意味着你想打电话

[self.locationManager startUpdatingLocation]

但你也可以使用

---

[self.locationManager startMonitoringSignificantLocationChanges]

如果将委托设置为零，则不会获得有关授权状态更改的更新，不是吗

self.locationManager.delegate = nil;

我认为您应该保留代理以接收授权状态更新，然后调用startUpdatingLocation方法以获取当前位置

- (void)startUpdatingLocation

---

在上面的示例中，如果授权被撤销，则将locationManager.delegate设置为零。。。您是否再次将其设置为适当的类？刚才注意到您还将locationManager设置为零…根据您在某处重新创建

locationManager

对象的代码中的注释-您确定在设置

self.locationServiceDisabled=false

时会触发此操作？我看不到您开始更新您的位置（cllocationmanager startupdatinglocation）在apple文档中是locationManager的location属性：“如果从未检索到位置数据，则此属性的值为零。”因此，您需要以某种方式更新iPhone位置！为了实现这一点，您应该致电locationmanager startupdatinglocation。。。方法！如果您想仔细查看我的代码，那么很明显，在getter方法中，我再次设置了delegate。这将使这个答案更好。谢谢