Question

我在iPhone设备上执行以下代码时遇到了一些奇怪的内存泄漏：

@implementation TestViewController
@synthesize myButton;

- (IBAction)buttonPressed {
    ABPeoplePickerNavigationController* selectContactViewController = nil;

    selectContactViewController = [[ABPeoplePickerNavigationController alloc] init];
    selectContactViewController.peoplePickerDelegate = self;
    [self presentModalViewController:selectContactViewController animated:YES];
    [selectContactViewController release];
}

如下所述简单地发布选择器：

- (void)peoplePickerNavigationControllerDidCancel:(ABPeoplePickerNavigationController *)peoplePicker {

    [self dismissModalViewControllerAnimated:YES];
}

仪器标记“selectContactViewController = [[ABPeoplePickerNavigationController alloc] init];”泄漏。知道为什么吗？

Answer 1

你可能想要像这样构建你的Picker控件：

ABPeoplePickerNavigationController* selectContactViewController = nil;

selectContactViewController = [[[ABPeoplePickerNavigationController alloc] init] autorelease];
selectContactViewController.peoplePickerDelegate = self;
[self presentModalViewController:selectContactViewController animated:YES];

当您呈现模态视图控制器时，它将自己保留视图。这就是它如何能够将视图控制器的实例传递给您的委托。最好的办法是将视图控制器设置为自动释放，因此当它从导航控制器中弹出时，NSAutoReleasePool将对其进行垃圾收集。

Answer 2

只是评论 - 您是否在接口声明中使用任何协议，如UINavigationControllerDelegate？

我遇到的情况是，引用此协议会导致类似的泄漏消息。

需要帮助修复iPhone内存泄漏！

2 个答案: