如何正确替换视图控制器 [英] How to properly replace view controllers

问题描述

我就是不明白我做错了什么.我有 2 个不相关的视图控制器，我在 storyboard 中通过将视图控制器拖到屏幕上来创建它们.每个在故事板中都有其名称标识符，我用它们的名称替换它们.

I just can't understand what am i doing wrong with this. I have 2 unrelated view controllers, which i created in storyboard by dragging a view controller to screen. each has its name identifier in storyboard and i replace between them by their names.

问题是，在第一次更换后，我收到数十个与现实无关的内存警告，因为我的内存消耗约为 59M 并保持不变.当我从 A 切换到 B 然后再切换回 A 时，有时会由于记忆湖"(59M！！)而崩溃.

Problem is ,that after the first replacement i get tens of memory warnings that are unrelated to reality because my memory consumption is about 59M and stay like that . When i switch from A to B and than back to A, sometimes its crash due to "lake of memory" (59M!! ) .

更换视图控制器时我做错了什么???

What am i doing wrong when replacing view controllers ???

- (IBAction)goMatrix:(id)sender
{
    UIViewController *mainV=[self.storyboard instantiateViewControllerWithIdentifier:@"MatrixView"];
    mainV.modalTransitionStyle = UIModalTransitionStyleCrossDissolve;
    [self presentViewController:mainV animated:YES completion:^(void)
     {
         scroller.delegate=nil;
         scroller=nil;
         [imagesBuffer removeAllObjects];
         [scroller removeFromSuperview];
         [stripView removeFromSuperview];


     }];

}

我在它们两个中都有一个带有图像的滚动视图，我只是从超级视图中删除了它，我只是不明白我还能做些什么来真正清理东西(尽管内存只是59M)

I have a scrollview in both of them with images, that i just remove from the superview, i just can't understand what else can i do to REALLY clean things up (although memory is just 59M )

• 我唯一拥有高内存的时刻是当我更换它们时，它的 134M 只有 1 秒(！)

推荐答案

如果你的 App 是单视图结构(没有嵌入在 UINavigationController 或 UITabBarController 中)，你可以使用:

If your App is a single view structure (without embedded in UINavigationController or UITabBarController), you can use:

// App Delegate
UIViewController *mainV=[self.storyboard instantiateViewControllerWithIdentifier:@"MatrixView"];
self.window.rootViewController = mainV;
[self.window makeKeyAndVisible];
stripView = nil;

如果您使用 ARC，旧的视图控制器将自动从内存中删除.

Old view controller will be automatically be removed from memory if you use ARC.

如果你在 View Controller 中编写，你可以使用:

If you are writing in View Controller, you can use:

UIViewController *mainV=[self.storyboard instantiateViewControllerWithIdentifier:@"MatrixView"];
AppDelegate *delegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
delegate.window.rootViewController = mainV;
[delegate.window makeKeyAndVisible];
stripView = nil;

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