Memorymanagement得到一个NSMutableArray的时候从NSObject类到UIViewController类

Question

我有下面的代码泄漏内存问题...

@property (nonatomic, retain) NSMutableArray *childrensArray; 


-(void)connectionDidFinishLoading:(NSURLConnection *)connection { 

NSLog(@"Connection finished loading."); 
// Dismiss the network indicator when connection finished loading 
[UIApplication sharedApplication].networkActivityIndicatorVisible = NO; 

// Parse the responseData of json objects retrieved from the service 
SBJSON *parser = [[SBJSON alloc] init]; 

NSString *jsonString = [[NSString alloc] initWithData:responseData encoding:NSUTF8StringEncoding]; 
NSDictionary *jsonData = [parser objectWithString:jsonString error:nil]; 
childrensArray = [jsonData objectForKey:@"Children"]; 

// Callback to AttendanceReportViewController that the responseData finished loading 
[attendanceReportViewController loadChildren]; 

[connection release]; 
[responseData release]; 
[jsonString release]; 
[parser release]; 
} 

在的viewController下面还泄漏内存...

@property (nonatomic, retain) NSMutableArray *childrensArray; 


- (void)loadChildren { 

// Retrieve a array with dictionaries of children from ServiceGetChildren 
self.childrensArray = [[serviceGetChildren.childrensArray copy] autorelease]; 

int total = [childrensArray count]; 
totalLabel.text = [NSString stringWithFormat:@"%d", total]; 

[theTableView reloadData]; 
} 

Answer 1

只有在释放实例时才会释放childrensArray。你也应该设置它之前释放实例变量：

- (void)loadChildren { 
    // Retrieve a array with dictionaries of children from ServiceGetChildren 
    [childrensArray release]; 
    childrensArray = [serviceGetChildren.childrensArray copy]; 
} 

一个更好的办法是实际使用你的财产：

- (void)loadChildren { 
    // Retrieve a array with dictionaries of children from ServiceGetChildren 
    self.childrensArray = [[serviceGetChildren.childrensArray copy] autorelease]; 
} 

（注意autorelease）

这样做的好处您应该使用它们触发KVO通知。