[self MethodName]和[self performSelector：@selector（Method Name）]之间的区别 [英] Difference between [self MethodName] and [self performSelector:@selector(Method Name)]

问题描述

使用以下类型调用方法有什么区别

What is the difference between calling the methods with following types

1。

[self methodName];

和

2。 >

2.

[self performSelector:@selector(methodName)];   // no afterDelay is used

就像performSelector会使用不同的线程工作

Is it like performSelector will use different thread to work??

推荐答案

在大多数情况下，它们是等效的。

In most cases, they are equivalent.

根据文档中， performSelector：变体的目的是您可以调用动态定义的，在编译时实际不存在的方法。就这样。对于调用 在编译时出现的方法，两者之间没有区别。

According to the documentation, the purpose of the performSelector: variant is so that you can call methods that are defined dynamically and not actually present at compile-time. That's all. For calling a method that is present at compile-time, there is no difference between the two.

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