iOS内存泄漏与活动视图

Question

我刚刚在我的应用中发现内存泄漏，但我不确定如何修复它。它涉及一个活动视图，用于共享从rss Feed查看的当前文章的URL。我不确定泄漏发生的原因。任何想法或建议？

iPhone版本的问题是：

- (void) showMenu
{   
    NSURL *urlToShare = hackyURL;
    NSArray *activityItems = @[urlToShare];
    TUSafariActivity *activity = [[TUSafariActivity alloc] init];

    UIActivityViewController *activityVC = [[UIActivityViewController alloc]initWithActivityItems:activityItems applicationActivities:@[activity]];
    activityVC.excludedActivityTypes = @[UIActivityTypeAssignToContact, UIActivityTypePostToWeibo, UIActivityTypeSaveToCameraRoll];

    [self presentViewController:activityVC animated:TRUE completion:nil];
}

编辑：我通过将上述代码更改为：

来解决iPhone泄漏问题

__block UIActivityViewController *activityVC = [[UIActivityViewController alloc]initWithActivityItems:activityItems applicationActivities:@[activity]];
    activityVC.excludedActivityTypes = @[UIActivityTypeAssignToContact, UIActivityTypePostToWeibo, UIActivityTypeSaveToCameraRoll];

    [self presentViewController:activityVC animated:YES completion:^{activityVC.excludedActivityTypes = nil; activityVC = nil;}];

iPad版本基本相同，只是它使用弹出框来显示活动视图。

- (void)showMenu
{    
    NSURL *urlToShare = hackyURL;
    NSArray *activityItems = @[urlToShare];
    TUSafariActivity *activity = [[TUSafariActivity alloc] init];

    UIActivityViewController *activityVC = [[UIActivityViewController alloc]initWithActivityItems:activityItems applicationActivities:@[activity]];
    activityVC.excludedActivityTypes = @[UIActivityTypeAssignToContact, UIActivityTypePostToWeibo, UIActivityTypeSaveToCameraRoll];

    if ([popover isPopoverVisible])
    {
        [popover dismissPopoverAnimated:YES];
        popover = nil;
    }
    else
    {
        self.popover = [[UIPopoverController alloc]initWithContentViewController:activityVC];
        [self.popover presentPopoverFromBarButtonItem:systemAction permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];
    }

}

Answer 1

我通过将上面的代码更改为：

来修复iPhone泄漏

__block UIActivityViewController *activityVC = [[UIActivityViewController alloc]initWithActivityItems:activityItems applicationActivities:@[activity]];
    activityVC.excludedActivityTypes = @[UIActivityTypeAssignToContact, UIActivityTypePostToWeibo, UIActivityTypeSaveToCameraRoll];

    [self presentViewController:activityVC animated:YES completion:^{activityVC.excludedActivityTypes = nil; activityVC = nil;}];

但我无法弄清楚如何修复iPad上的popover漏洞。

Answer 2

 if ([self.popover isPopoverVisible])
    {
        [self.popover dismissPopoverAnimated:YES];
        self.popover = nil;
    }
    else
    {
        self.popover = [[UIPopoverController alloc]initWithContentViewController:activityVC];
        [self.popover presentPopoverFromBarButtonItem:systemAction permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];
    }

希望它能解决您的问题。