如何删除子视图（或视图的所有子视图） [英] How to remove a subview (or all subviews of a view)

问题描述

我有一个方法，其中我alloc和init一个

  UIView（`tabsClippedView = [[[UIView alloc] initWithFrame ：tabsClippedFrame] autorelease];`）。 
 

此视图添加了另一个视图

 （`tabsView = [[[UIView alloc] initWithFrame：tabsFrame] autorelease];`）。 
  

然后我启动几个按钮

 （例如`UIButton * btn = [[[UIButton alloc] initWithFrame：frame] autorelease];`）
   
 
并将它们添加到视图的子视图。
 
 
 
现在有时，我需要删除所有的按钮和再次分配。是删除整个视图还是删除我添加了按钮的子视图的最佳方法？
 
 
 
我需要做什么（没有内存泄漏等）？ 很简单 
  self.tabsView = nil; 
  
 足以删除视图及其所有子视图strong> 
 
 
 
或者最好也删除superview，从头开始：
  self.tabsClippedView = nil; 
  
 
 
解决方案
由于您的UIView是自动释放的，它从superview。对于它有 removeFromSuperview 方法。
 
 
 
所以，你只想调用 [self.tabsView removeFromSuperview] 。只要您的属性声明设置为 retain ，那就是您需要的。
 
I have a method in which I alloc and init an 
UIView (`tabsClippedView = [[[UIView alloc] initWithFrame:tabsClippedFrame] autorelease];`).
This view has another view added to it 
(`tabsView = [[[UIView alloc] initWithFrame:tabsFrame] autorelease];`).     
Then I initiate a couple of buttons
(e.g. `UIButton* btn = [[[UIButton alloc] initWithFrame:frame] autorelease];`)
and add them to the subview of the view.

Now from time to time, I need to delete all the buttons and assign them again. Is the best way to delete the entire view or simply the subview to which I added the buttons?

How would I need to do this (without memory leaking etc.)? Would a simple
self.tabsView = nil;
suffice to delete the view and all of its subviews (i.e. the buttons)?

Or would it better to delete the superview as well, to start entirely from scratch:
self.tabsClippedView = nil;

解决方案
Since your UIView is autoreleased, you just need to remove it from the superview. For which there is the removeFromSuperview method.

So, you'd just want to call [self.tabsView removeFromSuperview]. As long as your property declaration is set to retain that's all you'll need.

                        
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