Question

我试图找出以下方法是如何导致内存泄漏的。分配了一个 < code> UIPopover 主计长 < / code >, 但是, 如果我包括一个 < code> autorelease 或 < code> release 呼叫, 应用程序崩溃, 消息 < code > - [UIPopover 主计长事务仍然可见, 到达时仍然可以看到。 < / code >

-(void)mapView:(MKMapView *)mapView annotationView:(MKAnnotationView *)view calloutAccessoryControlTapped:(UIControl *)control {
    [mapView deselectAnnotation:view.annotation animated:TRUE];

    if ( UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad ) {
        UIViewController *con = [[UIViewController alloc] init];
        UIPopoverController *poc = [[UIPopoverController alloc] initWithContentViewController:con];

        [con release];

        poc.popoverContentSize = CGSizeMake( 320, 320 );
        [poc presentPopoverFromRect:view.bounds inView:view permittedArrowDirections:UIPopoverArrowDirectionAny animated:TRUE];
    }
    else {
        ;   // TODO (miked): display stuff another way
    }
}

这似乎违背了基本的记忆管理做法。

p. s. 我还没有启用 ARC 。

Answer 1

这还是一个记忆泄漏!

You have to keep a reference to the popover controller in your class and/or implement the delegate method popoverControllerDidDismissPopover: (you can release it there).
A popover controller does not retain itself when you call its "present..."-methods and throws an exception if it is deallocated and still visible

Answer 2

UIPopover 主计长

- (void)popoverControllerDidDismissPopover:(UIPopoverController *)popoverController method and do the following.

- (void)popoverControllerDidDismissPopover:(UIPopoverController *)popoverController {

    if(popoverController == yourPopoverController)

    {

            [popoverController release];

    }

}

友情链接