Use clear and coordinated naming methods

Use clear and coordinated naming methods

1. Method naming rules. Take NSString and NSMutableString as examples.

• If the method is newly created
  • The first name of the method should be its return type.

  + (instancetype)string;  + (instancetype)stringWithString:(NSString *)string;  + (instancetype)stringWithCharacters:(const unichar *)characters length:(NSUInteger)length;

• Some modifiers can be added before the return type.

- (NSString *)substringFromIndex:(NSUInteger)from;

• The attribute access method should be named by the attribute name.

- (NSUInteger)length;

• The get prefix must be added when the return value is returned through the output parameter instead of the return value.

- (void)getCharacters:(unichar *)buffer range:(NSRange)range; 

• If the returned value is boolean, the is prefix should be added.

- (BOOL)isEqualToString:(NSString *)aString;

• If the method needs to be operated on the current object, it should include the verb. If there is a parameter, one or more parameters should be added after the verb.

//NSMutableString- (void)appendString:(NSString *)aString;

2. Naming rules for classes and protocols

• Class and protocol should have a prefix

NSArray、UIView

• If it is inheritance, the end of the subclass should be consistent with that of the parent class.

NSArray : NSMutableArray UIView : UIImageView、UITableView ..

• The delegated agreement should contain the name of the entrusting party

UITableView : UITableViewDelegate