Possible Duplicate:
What do the plus and minus signs mean in Objective C next to a method?
页: 1 我已开始在目标C制定方案,我一直在执行这样的方法:
-(void)doSomething
最近,我在一份源码中看到了这一点:
+(void)doSomething
+与+之间的区别是什么?
Possible Duplicate:
What do the plus and minus signs mean in Objective C next to a method?
页: 1 我已开始在目标C制定方案,我一直在执行这样的方法:
-(void)doSomething
最近,我在一份源码中看到了这一点:
+(void)doSomething
+与+之间的区别是什么?
“+”开始采用的方法是等级方法,即不要求实际物体(某类情况),而是按类别本身。
返回类型前的“+”方法表明,存在这种静态方法(不存在该类物体的瞬时)。 “-”方法与单个物体有关。
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