CLLocationManager初始化，释放，初始化，然后释放导致崩溃？

我有一个用例，其中应用程序会自动尝试检索一个位置，用户可以拒绝该权限，然后用户可以触发应用程序再次查找该位置（这次允许它），但然后该应用程序将崩溃。以下是基本代码和用例步骤，下面是我做错了什么？CLLocationManager初始化，释放，初始化，然后释放导致崩溃？

@interface AppViewController : UIViewController <CLLocationManagerDelegate>{ 
    CLLocationManager *locationManager; 
} 
@property (retain,nonatomic) CLLocationManager *locationManager; 

//... method declaration 

@end 

@implementation AppViewController 
@synthesize locationManager; 

-(void)MethodThatAutomaticallyGetsLocation{ 
    [self FindLocation]; 
} 
-(IBAction)UserTriggerToGetLocation{ 
    [self FindLocation]; 
} 

-(void)FindLocation{ 
    locationManager = [[CLLocationManager alloc] init]; 
    locationManager.delegate = self; 
    [locationManager startUpdatingLocation]; 
} 
-(void)locationManager:(CLLocationManager *)manager 
    didUpdateToLocation:(CLLocation *)newLocation 
      fromLocation:(CLLocation *)oldLocation{ 

     // ... do some stuff 
     // ... save location info to core data object 

     [locationManager stopUpdatingLocation]; 
     locationManager.delegate = nil; 
     [locationManager release]; 

} 
-(void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error{ 

     // ... conditionally display error message 
     //  based on type and app state 

     [locationManager stopUpdatingLocation]; 
     locationManager.delegate = nil; 
     [locationManager release]; 
} 

- (void)dealloc { 
    // locationManager not released here, its released above 
} 
@end

应用程序加载浏览，邮件MethodThatAutomaticallyGetsLocation
FindLocation被称为设置locationManager
电话询问权限共享位置
用户拒绝允许
locationManager:didFailWithError被调用时，释放locationManager
用户与UI交互，触发(IBAction) UserTriggerToGetLocation这就要求FindLocation
电话又问许可，这时候用户允许它
locationManager:didUpdateToLocation:fromLocation就执行

然后应用程序崩溃内locationManager:didUpdateToLocation:fromLocation时[locationManager release]被调用。具体来说，我得到EXC_BAD_ACCESS这意味着locationManager已经发布？但是哪里？

我做错了什么？

来源

2010-06-25 Jeof

呃，没关系。我想我am在dealloc之前发布时发生了一些问题，但我也意识到我不需要在此之前发布。通过简单地在其响应处理程序中停止locationManager，我可以通过将UserTriggerToGetLocation更改为[locationManager startUpdatingLocation] NOT FindLocation来重新启动它以执行步骤6。

来源

2010-06-25 18:14:13 Jeof

CLLocationManager初始化，释放，初始化，然后释放导致崩溃？

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