ios View Controller不断占用内存 [英] ios view controllers keep staking in memory

问题描述

我不熟悉ObjectiveC.我正在开发我的第一个应用程序. -它基本上由2个视图控制器组成，我使用模式搜索在它们之间进行切换.主vc是一个菜单，它为每个菜单项加载具有不同属性的第二vc. -我注意到当我从一个vc切换到另一个vc时，内存一直在增加.这是我尝试解决的问题，但没有任何效果，而且看起来也不干净.

I am new to Objective C. I am working on my first app. - It basically consists of 2 view controllers, and I use modal segue to switch between them. The main vc is a menu that loads up the 2nd vc with different attributes for each menu item. - I noticed that the memory keeps increasing when I switch from one vc to the other. This was my attempt to solve the issue but it doesn't make a difference and it doesn't look clean.

-(void)viewDidDisappear:(BOOL)animated{
    ViewController *me = self;
    me = nil;
}

在这种情况下处理内存的最佳实践是什么?

What is the best practice to handle memory in a case like this?

推荐答案

问题是您正在双向使用模态搜索 .不要那样做您每次都只是在创建一个新的视图控制器:视图控制器彼此叠放.模态选择的反面(毕竟实际上是presentViewController:animated:)不是另一个模态选择.它是dismissViewControllerAnimated:(或者增加了一些复杂性，是放松的选择).

The problem is that you are using a modal segue in both directions. Don't do that. You are simply creating a new view controller each time: you have view controllers piling up on top of each other. The opposite of a modal segue (which is actually presentViewController:animated:, after all) is not another modal segue; it is dismissViewControllerAnimated: (or, with some added complexity, an unwind segue).

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