1. @ %@ description
2. @interface @end
3. @implenmention @end
4. @protocol @required @optional
5. @autoreleasepool
6. @class
7. @encode
8. @selector
9. @property atomic, copy, readonly, getter =
nonatomic retain readwrite setter =
assign
10. @public @protected @private @package
11. @" "
@[ ]
@{ }
- 实例方法
+ 类方法
12. id instancetype
13. nil
14. self
15. super
16. alloc
17. init
18. dealloc
19. retainCount
20. retain
21. release
22. autorelease