2.9、规则:方法的每个参数必须有参数声明,尽可能对参数做出􏰁述

示例:

-(void)sendAction:(SEL)aSelectortoObject:(id)anObjectforAllCells:(BOOL)flag; Right.

-(void)sendAction:(SEL)aSelector :(id)anObject :(BOOL)flag Wrong. ;

- (id)viewWithTag:(NSInteger)aTag; Right. 

- (id)taggedView:(int)aTag; Wrong.