IOS开发教程自定义CheckBox控件.docx

IT在线教育平台麦子学院：首先创建工程文件，CheckBox,然后创建CheckBox类，继承自UIView,同时添加资源文件，选中、取消的图片，添加完成以后目录如下：CheckBox类头文件代码如下：1. #import 2. 3. protocol CheckBoxDelegate;4. 5. interface CheckBox : UIView6. 7. property(nonatomic,retain)NSString *text;/显示文字8. property(nonatomic,assign)BOOL checked;/是否选中9. 10. property(nonatomic,retain) id delegate;/代理11. 12. -(id)initWithText:(NSString *)text frame:(CGRect)frame;/初始化13. 14. end15. 16. protocol CheckBoxDelegate17. 18. -(void)onChangeDelegate:(CheckBox *)checkbox isCheck:(BOOL)isCheck;19. 20. end复制代码CheckBox实现代码如下：1. #import CheckBox.h2. interface CheckBox()3. 4. property(nonatomic,retain)UIImage *onImage;5. property(nonatomic,retain)UIImage *offImage;6. 7. end8. 9. 10. implementation CheckBox11. 12. -(void)dealloc13. _text release;14. _delegate release;15. _onImage release;16. _offImage release;17. super dealloc;18. 19. - (id)initWithFrame:(CGRect)frame20. 21. self = super initWithFrame:frame;22. if (self) 23. / Initialization code24. 25. return self;26. 27. -(id)initWithText:(NSString *)text frame:(CGRect)frame28. self=super initWithFrame:frame;29. if(self)30. _text=text;31. self.backgroundColor=UIColor clearColor;32. self.onImage=UIImage imageNamed:chk_on.png;/选中图片33. self.offImage=UIImage imageNamed:chk_off.png;/取消图片34. 35. return self;36. 37. -(void)setChecked:(BOOL)checked38. _checked=checked;39. /注册代理事件，通知状态改变40. if(self.delegate respondsToSelector:selector(onChangeDelegate:isCheck:)41. self.delegate onChangeDelegate:self isCheck:_checked;42. 43. 44. self setNeedsDisplay;45. 46. -(void)drawRect:(CGRect)rect/将text,image绘制到UIView上面47. UIImage *image=self.checked?self.onImage:self.offImage;48. image drawAtPoint:CGPointMake(5, 8);49. UIFont *font=UIFont systemFontOfSize:16.0f;50. self.text drawAtPoint:CGPointMake(25, 8) withFont:font;51. 52. /点击事件53. -(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event54. self.checked=!self.checked;55. 56. 57. 58. end复制代码调用代码如下：首先引入CheckBox,1. #import ViewController.h2. #import CheckBox.h3. 4. interface ViewController ()5. 8. 9. 10. end11. 12. implementation ViewController13. 14. - (void)viewDidLoad15. 16. super viewDidLoad;17. / Do any additional setup after loading the view, typically from a nib.18. CheckBox *cb=CheckBox alloc initWithText:乒乓球 frame:CGRectMake(10, 10, 80, 30);19. cb.delegate=self;/设置委托20. self.view addSubview:cb;21. cb release;22. 23. 24. -(void)onChangeDelegate:(CheckBox *)checkbox isCheck:(BOOL)isCheck/25. NSLog(text:%,State:%,checkbox.text,isCheck?YES:NO);26. 27. 28. - (void)didReceiveMemoryWarning29. 30. super didReceiv