CLLocationManager是否會導致此崩潰？

Question

我有一個UIPickerView對象，該對象基於列出的「主」位置或當前位置（使用CLLocationManager）列出商店。如果後者被實現，我向我的服務器做一個NSMutableURLRequest以獲得最近的商店，然後用接收的列表更新一個UIPickerView。

有時候（當我在「家」的位置時，從來不會奇怪），我會使用當前位置，我會看到選取器更新列表，然後應用程序立即崩潰。

我選擇器的代碼很簡單：

-(NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView{ 
return 1; 
} 

-(NSInteger) pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component { 
    if (isHome) { 
     return [storesData count]; 
    } else { 
     return [storesDataLoc count]; 
    } 
} 

-(NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component { 
    if (isHome) { 
     return [[storesData objectAtIndex:row] objectForKey:@"STName"]; 
    } else { 
     return [[storesDataLoc objectAtIndex:row] objectForKey:@"STName"]; 
    } 
} 

一個想到的是，它提供了一個第二，更準確的讀數和我釋放的東西，我可能已經釋放。我CLLocationManager代碼：

- (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error { 
if (error.code == kCLErrorLocationUnknown) { 
    NSLog(@"Currently unable to retrieve location"); 
} else if (error.code == kCLErrorNetwork) { 
    NSLog(@"Network used to retrieve location is unavailable"); 
} else if (error.code == kCLErrorDenied) { 
    NSLog(@"Permission to retrieve location is denied"); 
    [locMan stopUpdatingLocation]; 
    [locMan release]; 
    locMan = nil; 

    // revert segmented controller to Home position 
    storeSource.selectedSegmentIndex = 0; 
} 
if(loadstoresconnection!=nil){ 
    [loadstoresconnection release]; 
} 
networkView.hidden = TRUE; 
isHome = TRUE; 
} 

- (void)locationManager:(CLLocationManager *)manager 
didUpdateToLocation:(CLLocation *)newLocation 
     fromLocation:(CLLocation *)oldLocation { 

if (newLocation.horizontalAccuracy >= 0) { 
    networkView.hidden = TRUE; 
    if (newLocation.horizontalAccuracy < 200) { 
     [locMan stopUpdatingLocation]; 
     [locMan release]; 
     locMan = nil; 
    } 

    //call for store list from this location 
    NSString *myString = [NSString stringWithFormat:@"http://mywebsite.com/?lat=%f&lng=%f",newLocation.coordinate.latitude,newLocation.coordinate.longitude]; 
    NSURL *myURL = [[NSURL alloc] initWithString:[myString stringByAddingPercentEscapesUsingEncoding:NSASCIIStringEncoding]]; 
    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:myURL cachePolicy:NSURLRequestReloadIgnoringLocalCacheData timeoutInterval:60]; 
    loadstoresconnection = [[NSURLConnection alloc] initWithRequest:request delegate:self]; 
} 
} 

和配屬NSMutableURLRequest方法是：

- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error { 
[responseData release]; 
[connection release]; 
networkView.hidden = TRUE; 
isHome = YES; 
// [textView setString:@"Unable to fetch data"]; 
} 

- (void)connectionDidFinishLoading:(NSURLConnection *)connection { 
int i; 
NSArray *querydata; 

networkView.hidden = TRUE; 
[loadstoresconnection release]; 
if (storesDataLoc!=nil) { 
    [storesDataLoc release]; 
    storesDataLoc = nil; 
} 
storesDataLoc = [[NSMutableArray alloc] init]; 
NSString *txt = [[[NSString alloc] initWithData:responseData encoding: NSASCIIStringEncoding] autorelease]; 
[responseData release]; 
// put data into variables. 
querydata = [txt componentsSeparatedByString:@"<-sl->"];//break up data into data sections: 0 - number of deptsections and names, 1 - list of objects 
NSArray *allstoreinfo; 
for (i=0; i<[querydata count]; i++) { 
    allstoreinfo = [[querydata objectAtIndex:i] componentsSeparatedByString:@"<-as->"]; 
    [storesDataLoc addObject:[[[NSMutableDictionary alloc] initWithObjectsAndKeys:[allstoreinfo objectAtIndex:0],@"STid",[allstoreinfo objectAtIndex:1],@"STName",[allstoreinfo objectAtIndex:2],@"STAddr",nil] autorelease]]; 
} 
if ([querydata count]>0) { 
    [pickerView reload]; 
    [pickerView selectRow:0 inComponent:0 animated:NO]; 
    isHome = NO; 
}  

}

林好奇，爲什麼我可以看到選擇器就在崩潰之前被更新。因爲這是在路上發生的，所以我懷疑這是一個準確的事情，而位置管理器正在發送第二個結果，導致崩潰。有什麼想法嗎？

Answer 1

看來我試圖做太多的快捷方式。當用戶點擊位置按鈕時，它會打開LocationManager，每個結果都會爲我的服務器建立一個NSURLConnection。我被帶到一個班級來處理所有這些，但隨着位置管理器返回的多個結果，NSURLConnections似乎不受控制。從那以後，我把每個位置管理員的成績都放在了自己的班級裏，而且所有的工作都很順利。所以，選擇器沒有問題 - 主要是位置管理器和nsurlconnections的內存問題。