self.tableView.delegate = self和self.table.dataSource = self内存泄漏

Question

我有以下代码，其中有内存泄漏的设备，您可以帮助检查它吗？谢谢。

@interface NewsListViewController : UIViewController<UITableViewDataSource, UITableViewDelegate> {

@private
  UITableView *tableView;
  NSFetchedResultsController *fetchedResultsController;
......

}

@property (nonatomic, retain, readonly) NSFetchedResultsController *fetchedResultsController;

@end



@implementation NewsListViewController {

......

 - (void)dealloc {
    [fetchedResultsController release];
 fetchedResultsController = nil; 

    tableView.delegate = nil;
 tableView.dataSource = nil;
 [tableView release];
 tableView = nil;

    [super dealloc];
 }

 -(void)viewDidLoad {

......

  tableView.delegate = self;   // **leak here**

  tableView.dataSource = self; // **leak here**
  DemoAppDelegate *appDelegate = (DemoAppDelegate *)[UIApplication sharedApplication].delegate;
 [[NSNotificationCenter defaultCenter] addObserver:self
           selector:@selector(handleSaveNotification:)
         name:NSManagedObjectContextDidSaveNotification
          object:appDelegate.managedObjectContext];

自获取；

}

- (void)fetch {

NSError *error = nil；BOOL success = self.fetchedResultsController性能获取：& error；if (!success) {debugLog(@“执行抓取时出现未处理错误：%@"，error localizedDescription)；NSAssert1(0，@”执行抓取时出现未处理错误：%@"，error localizedDescription)；} tableView reloadData；

}

 - (NSFetchedResultsController *)fetchedResultsController {

if (fetchedResultsController == nil) { NSFetchRequest *fetchRequest = [[NSFetchRequest alloc ] autorelease]；

DemoAppDelegate * inManagedObjectContext:appDelegate.managedObjectContext]；= (DemoAppDelegate *)UIApplication sharedApplication.delegate；[fetchRequest setEntity:NSEntityDescription entityForName：@“新闻”appDelegate

fetchedResultsController = [NSFetchedResultsController alloc :fetchRequest:nil cacheName:@"NewsCache"]；

}

返回fetchedResultsController；}

 - (void)handleSaveNotification:(NSNotification *)aNotification {

DemoAppDelegate * mergeChangesFromContextDidSaveNotification:aNotification；= (DemoAppDelegate *)UIApplication sharedApplication.delegate；appDelegate.managedObjectContext appDelegate自取；}

 - (UITableViewCell *)tableView:(UITableView *)table cellForRowAtIndexPath:(NSIndexPath *)indexPath {

    News *news = [fetchedResultsController objectAtIndexPath:indexPath];

    // fill cell.label.text according to the news field value

 }   

 @end

Answer 1

设置UITableView实例的委托或dataSource属性不太可能导致明显的内存泄漏。

您应该更彻底地检查周围的代码。