NSObject是Objective-C中的Abstract类吗?但是我们可以创建NSObject的实例，那么它如何遵循Abstract类的规则? [英] Is NSObject is Abstract class in Objective-C? But we can create instance of NSObject, then how does it follow the rule of Abstract class?

问题描述

在Objective-C中哪个类是Abstract类，我已经阅读了一些文档，其中NSObject是Abstract类，但是我们可以创建NSObject的实例，然后如何遵循抽象类规则.

Which class is Abstract class in Objective-C, I have read some doc where NSObject is Abstract class, but we can create instance of NSObject, then how it is follow the abstract class rule.

NSObject *obj = [[NSObject alloc] init];    
NSLog(@"description = %@",[obj description]);    
NSLog(@"class name = %@",[obj class]); 

请咨询.

我还听到了Objective-C中的另一个抽象类，该类的名称是什么?

And also I heard another one Abstract Class in Objective-C, what is the name of the class?

推荐答案

Objective-C没有实例化抽象类的编译时间限制.请参见在Objective-C中创建抽象类

Objective-C has no compile time restraint against instantiating abstract classes. See Creating an abstract class in Objective-C

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