在iPhone上的GoogleMaps上获取我的位置时崩溃 [英] Crash while getting my location on GoogleMaps on iPhone

问题描述

我写信给你是因为我被一个超级奇怪的错误困住了. 我试图在我的应用程序上添加GMS，最后，当我必须获取设备位置时，我陷入了此崩溃:

I am writing you because I am stuck with a super strange error. I tried to add GMS on my app, and finally, when I have to get device location, I am stuck with this crash:

由于未捕获的异常"NSInternalInconsistencyException"而终止应用程序，原因:已释放分配了GMSMapView类的实例0x7ff7fd82def0，同时仍向其注册了键值观察器.当前观察信息:( 内容:0x0，属性:0x7ff7fdc2f470>

Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'An instance 0x7ff7fd82def0 of class GMSMapView was deallocated while key value observers were still registered with it. Current observation info: ( Context: 0x0, Property: 0x7ff7fdc2f470>

代码在这里初始化

self.mapView.myLocationEnabled = YES;
self.mapView.mapType = kGMSTypeNormal;
self.mapView.settings.compassButton = YES;
self.mapView.settings.myLocationButton = YES;

//=>    Listen to the myLocation property of GMSMapView.
[self.mapView addObserver:self
               forKeyPath:@"myLocation"
                  options:NSKeyValueObservingOptionNew
                  context:NULL];


- (void)observeValueForKeyPath:(NSString *)keyPath
                  ofObject:(id)object
                    change:(NSDictionary *)change
                   context:(void *)context
{
if ([keyPath isEqualToString:@"myLocation"] && [object isKindOfClass:[GMSMapView class]])
{   
    appDelegate().curUserLocation = [change objectForKey:NSKeyValueChangeNewKey];

    [self.mapView animateToCameraPosition:[GMSCameraPosition cameraWithLatitude:self.mapView.myLocation.coordinate.latitude
                                                                             longitude:self.mapView.myLocation.coordinate.longitude
                                                                                  zoom:15]];
}
}

仍然没有成功.我将断点放在observerValueForKey方法中，一旦离开这里，就会出现崩溃.没办法.

and still no success. I put breakpoint in observerValueForKey method, and once is out from here, crash appears. No way to get the idea.

我还删除了观察者:

- (void)viewWillDisappear:(BOOL)animated
{
[super viewWillDisappear:animated];

[self.mapView removeObserver:self forKeyPath:@"myLocation"];

//=>    Set map delegate to nil (to avoid:   mapView:regionDidChangeAnimated:]: message sent to deallocated instance )
self.mapView.delegate = nil;
self.mapView = nil;
}

没有成功.

有人可以帮助我吗?我尝试了所有可能的解决方案，但是没有办法.

Can anyone help me with this ? I tried all possible solutions, but no way.

提前谢谢！

推荐答案

在评论中已经说过了.GMSMapView必须为Strong 如果您不调用requestWhenInUseAuthorization

How already said in comment.. the GMSMapView must be Strong Your code will not work in iOS 8 if you not call requestWhenInUseAuthorization

我建议您仅使用CLLocationManager而不是KVO ...，但这是您的决定.

I recommend you to use only the CLLocationManager instead KVO... but is your decision.

附上我的示例 -我修改了Google示例...有2个示例:

Attached my example - I modified the Google example... with 2 example:

1. 使用KVO
2. 仅适用于CLLocationManager

如果有任何问题，请告诉我

If you have any issues... just let me know

PS别忘了添加您的API密钥

PS Don't forget to add you API Key

祝您编程愉快！

更新

如果您启动了UpUpdatingLocation ..请不要忘记使用stopUpdatingLocation将其停止..在ViewDidDisapear中说

if you startUpdatingLocation.. don't forget to stop it somewhere with stopUpdatingLocation.. let say in ViewDidDisapear

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