UILabel字符串释放？
我有一个像这样的 IBAction：
-(IBAction)
{
[kolikoZvanja setText: [NSString stringWithFormat: @"%i + ", [Data variables].zvanja]];
}
其中 [Data Variables].zvanja 通过程序更改，因此 UILabel 也通过程序更改，我需要 release 每次都kolikoZvanja？
I have an IBAction like this:
-(IBAction)
{
[kolikoZvanja setText: [NSString stringWithFormat: @"%i + ", [Data variables].zvanja]];
}
where [Data variables].zvanja changes through program, so UILabel changes too through program, do I need to release kolikoZvanja each time?
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评论（3）
你需要释放那些你保留的东西。您可以通过调用包括
new、alloc、copy或retain在内的方法来保留内容。您没有在此方法中的任何位置调用
retain，因此没有理由调用release。You need to release those things which you retain. You retain things by calling a method including
new,alloc,copyorretain.You aren't calling
retainanywhere in this method, so there is no reason you should callrelease.不，当然不是。如果每次释放标签，您将无法再设置其文本，或者每次都重新分配/初始化它并将其重新添加到视图中。
标签显示的字符串是由它复制的，所以它负责释放它。
No, of course not. If you release the label each time, you won't be able to set its text anymore, or you re alloc/init it each time and re-add it to the view.
The string displayed by the label is copied by it, so it is responsible for releasing it.
kolikoZvanja是一个指向UILabel的指针的属性。由于您仅设置此UILabel的text属性，因此您无法释放kolikoZvanja，它是UILabel 的“访问门”。释放kolikoZvanja会导致丢失指向UILabel的指针，因此您将无法设置它的text属性。kolikoZvanjais a property that is a pointer to aUILabel. Because you are setting only thetextproperty of thisUILabelyou cannot release thekolikoZvanjawhich is your "access gate" for yourUILabel. Releasing thekolikoZvanjawould effect in loosing a pointer to yourUILabelhence you would not be able to set it'stextproperty.