iphone 开发基础控件自定义UIButton之UIRadioButton

// // RadioButton.h // UIRadioButton // // Created by chen shaohong on 12-9-29. // Copyright 2012 __MyCompanyName__. All rights reserved. // #import <Foundation/Foundation.h> //Protocol协议 ,声明了可以被任何类实现的方法 @protocol RadioButtonDelegate <NSObject> -(void)radioButtonSelectedAtIndex:(NSUInteger)index inGroup:(NSString*)groupId; @end //创建RadioButton继承UIView，里边有radio的组id，radio的索引，radio用到的自定义类型的Button @interface RadioButton :UIView { NSString *_groupId; NSUInteger _index; UIButton *_button; } //RadioButton的属性 @property(nonatomic,retain)NSString *groupId; @property(nonatomic,assign)NSUInteger index; //initWithGroupId始化（将每一个button添加到静态数组rb_instances中）方法 //addObserverForGroupId添加radio分组对象到静态字典rb_observers中的方法 -(id)initWithGroupId:(NSString*)groupId index:(NSUInteger)index; +(void)addObserverForGroupId:(NSString*)groupId observer:(id)observer; @end