Question

我有以下代码，设备上有内存泄漏，请您帮忙检查一下？感谢。

@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];

[self fetch];

}

- (void)fetch {

NSError * error = nil; BOOL success = [self.fetchedResultsController performFetch：＆amp; error]; if（！success）{ debugLog（@“执行获取的未处理错误：％@”，[error localizedDescription]）; NSAssert1（0，@“执行获取的未处理错误：％@”，[error localizedDescription]）; } [tableView reloadData];

}

 - (NSFetchedResultsController *)fetchedResultsController {

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

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

fetchedResultsController = [[NSFetchedResultsController alloc] initWithFetchRequest：fetchRequest managedObjectContext：appDelegate.managedObjectContext sectionNameKeyPath：无 cacheName：@ “NewsCache”];

return fetchedResultsController; }

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

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

 - (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

天文数据不太可能设置UITableView实例的delegate或dataSource属性可能会导致明显的内存泄漏。

您应该更彻底地检查周围的代码。

self.tableView.delegate = self和self.table.dataSource = self memory leak

1 个答案: