当我也可以正常调用该方法时，我应该使用performSelector:吗？
我想调用通过[self delegate]获得的对象的方法。我知道它是哪个类，因此我可以导入该类并正常调用它，但我也可以使用 performSelector: ，它不需要导入我的类。我不需要将参数传递给该方法。是的，我确实读过这个。在这种情况下，哪一个更可取？
I want to call a method on an object which I get through [self delegate]. I know which class it is so I can import the class and call it normally but I could also use performSelector: which doesn't require importing my class. I do not need to pass a parameter to the method. And yes, I did read this. Which one is preferable in this case?
如果你对这篇内容有疑问，欢迎到本站社区发帖提问 参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。
绑定邮箱获取回复消息
由于您还没有绑定你的真实邮箱，如果其他用户或者作者回复了您的评论，将不能在第一时间通知您！
发布评论
评论（2）
直接调用方法更具可读性。
performSelector:应该在您需要更高阶消息传递时保留。严格来说，您不需要导入该类来向其发送消息，因为消息调度是动态的而不是静态的，尽管您会收到编译时警告，表明对象可能不会响应选择器。
Calling the method directly is more readable.
performSelector:should be reserved for when you need higher order messaging.Strictly speaking, you don't need to import the class to send it a message as message dispatch is dynamic rather than static, though you will get compile time warnings that the object may not respond to the selector.
一般来说，反射操作（例如
performSelector:）的效率低于直接操作。不过，我必须承认我对 objC 不是很熟悉。Generally speaking, reflective operations, such as
performSelector:, are less efficient than the direct ones. I have to admit that I am not very familiar with objC, though.