Question

我正在尝试使用FBUserSettingsViewController但每次尝试解除它时它都会崩溃。我使用以下代码来显示它：

FBUserSettingsViewController *userSettings = [[FBUserSettingsViewController alloc] initWithNibName:nil bundle:nil];
userSettings.readPermissions = @[];
userSettings.publishPermissions = @[@"publish_actions"];
userSettings.defaultAudience = FBSessionDefaultAudienceEveryone;
userSettings.delegate = self;
[self.navigationController pushViewController:userSettings animated:YES];

它显示正常，但是一旦我点击“返回”，我就会崩溃。崩溃是EXC_BAD_ACCESS：

#0  0x34ae85de in objc_msgSend ()
#1  0x00136916 in -[FBUserSettingsViewController dealloc] at /Users/jacl/src/release/ios-sdk/src/FBUserSettingsViewController.m:86
#2  0x389e29c8 in -[UINavigationController navigationTransitionView:didEndTransition:fromView:toView:] ()
#3  0x389e249e in -[UINavigationTransitionView _notifyDelegateTransitionDidStopWithContext:] ()
#4  0x38978a82 in -[UIViewAnimationState sendDelegateAnimationDidStop:finished:] ()
#5  0x389ed8ac in -[UIViewAnimationState animationDidStop:finished:] ()
#6  0x331a22e0 in CA::Layer::run_animation_callbacks(void*) ()
#7  0x30fe45da in _dispatch_client_callout ()
#8  0x30fe7e44 in _dispatch_main_queue_callback_4CF ()
#9  0x388c31b0 in __CFRunLoopRun ()
#10 0x3883623c in CFRunLoopRunSpecific ()
#11 0x388360c8 in CFRunLoopRunInMode ()
#12 0x30a3233a in GSEventRunModal ()
#13 0x389b7288 in UIApplicationMain ()
#14 0x00003424 in main at SNIP

如果有人可以告诉我，我搞砸了，那会很棒，但这看起来像是Facebook SDK中的一个错误。

Answer 1

我发现了这个问题。 Facebook编码了他们的dealloc错误。

在FBUserSettingsViewController和FBViewController中有dealloc，例如：

- (void)dealloc {
    [super dealloc];

    [_profilePicture release];
    [_connectedStateLabel release];
    [_me release];
    [_loginLogoutButton release];
    [_permissions release];
    [_backgroundImageView release];
    [_bundle release];
}

这是错误的，[super dealloc]应该总是被认为是最后一次。该对象在尝试解除其成员之前就被拆除了。我切换了订单（最后是dealloc），现在正在运行。我将在此处提出一个错误。

FBUserSettingsViewController在dismiss时崩溃

1 个答案: