l [20] ve：無效塊類型？

Question

我不知道爲什麼我得到這個錯誤。我也從下面的代碼中得到一個EXC_BAD_ACCESS問題。任何想法爲什麼？

在didRecieveResponse和didRecieveData和didRecieveData和didFinishLoading上運行斷點顯示了前兩個get run和mid way通過接收數據程序崩潰。

- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response { 
    // starts... :) 
    plistContentsData = [NSMutableData data]; //NSMutableData - inst in head 

} 

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data { 
    [plistContentsData appendData:data]; 
} 

- (void)connectionDidFinishLoading:(NSURLConnection *)connection { 
    mellowListings = [[NSArray alloc] initWithData:plistContentsData]; //NSArray - inst in head 

    NSLog(@"%@",mellowListings); 

    CLLocationCoordinate2D newLocation; 

    int counter = 0; 

    for(NSDictionary *tempDict in mellowListings){ 
     NSLog(@"%f",([[tempDict objectForKey:@"lat"] floatValue])); 
     NSLog(@"%f",([[tempDict objectForKey:@"long"] floatValue])); 
     newLocation.latitude = ([[tempDict objectForKey:@"lat"] floatValue]); 
     newLocation.longitude = ([[tempDict objectForKey:@"long"] floatValue]); 
     TCPlaceMarker *placemark = [[TCPlaceMarker alloc] initWithCoordinate:newLocation]; 
     placemark.title = [tempDict objectForKey:@"name"]; 
     placemark.subtitle = [tempDict objectForKey:@"address1"]; 
     placemark.source = [[tempDict objectForKey:@"source"] lowercaseString]; 
     placemark.tag = counter; 
     [mapView addAnnotation:placemark]; 
     counter++; 
    } 
} 

Answer 1

plistContentsData = [NSMutableData data]; 

您創建一個自動釋放NSMutableData對象，並有可能成爲你退出didReceiveResponse方法無效後的權利。您需要保留plistContentsData來解決該錯誤。