发布后是否有必要在Objective-C中将指针设置为nil? [英] Is It Necessary to Set Pointers to nil in Objective-C After release?

问题描述

做类似事情

NSString * string = [ [ NSString alloc ] init ];
...
[ string release ];

NSString * string = [ [ NSString alloc ] init ];
...
[ string release ];

或者添加

string = nil;

?

推荐答案

不是必需的，但是是很好的做法.如果您在发布后无意中引用了它，则可能会发生不好的事情，但是在目标C中，引用nil并没有任何危害.

Not necessary, but good practice. If you were to inadvertently reference it after release, bad things could happen, but in Objective C there isn't any harm in referencing a nil.

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