iOS UITextField 设置内边距

http://blog.csdn.net/erica_sadun/article/details/9088181

1.inherit UITextField Class.

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[cpp]?view plaincopy

1. .h??
2. //??
3. //??TextField.h??
4. //??TTShow??
5. //??
6. //??Created?by?twb?on?13-9-10.??
7. //??Copyright?(c)?2013年?twb.?All?rights?reserved.??
8. //??
9. ??
10. #import?<UIKit/UIKit.h>??
11. ??
12. @interface?TextField?:?UITextField??
13. ??
14. @property?(nonatomic,?assign)?CGFloat?dx;??
15. @property?(nonatomic,?assign)?CGFloat?dy;??
16. ??
17. @end??

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[cpp]?view plaincopy

1. .m??
2. //??
3. //??TextField.m??
4. //??TTShow??
5. //??
6. //??Created?by?twb?on?13-9-10.??
7. //??Copyright?(c)?2013年?twb.?All?rights?reserved.??
8. //??
9. ??
10. #import?"TextField.h"??
11. ??
12. #define?kTextFieldPaddingWidth??(10.0f)??
13. #define?kTextFieldPaddingHeight?(10.0f)??
14. ??
15. @implementation?TextField??
16. ??
17. -?(id)initWithFrame:(CGRect)frame??
18. {??
19. ????self?=?[super?initWithFrame:frame];??
20. ????if?(self)?{??
21. ????????//?Initialization?code??
22. ????}??
23. ????return?self;??
24. }??
25. ??
26. -?(CGRect)textRectForBounds:(CGRect)bounds??
27. {??
28. ????return?CGRectInset(bounds,??
29. ???????????????????????self.dx?==?0.0f???kTextFieldPaddingWidth?:?self.dx,??
30. ???????????????????????self.dy?==?0.0f???kTextFieldPaddingHeight?:?self.dy);??
31. }??
32. ??
33. -?(CGRect)editingRectForBounds:(CGRect)bounds??
34. {??
35. ????return?CGRectInset(bounds,??
36. ???????????????????????self.dx?==?0.0f???kTextFieldPaddingWidth?:?self.dx,??
37. ???????????????????????self.dy?==?0.0f???kTextFieldPaddingHeight?:?self.dy);??
38. }??
39. ??
40. -?(void)setDx:(CGFloat)dx??
41. {??
42. ????_dx?=?dx;??
43. ????[self?setNeedsDisplay];??
44. }??
45. ??
46. -?(void)setDy:(CGFloat)dy??
47. {??
48. ????_dy?=?dy;??
49. ????[self?setNeedsDisplay];??
50. }??
51. ??
52. /*?
53. //?Only?override?drawRect:?if?you?perform?custom?drawing.?
54. //?An?empty?implementation?adversely?affects?performance?during?animation.?
55. -?(void)drawRect:(CGRect)rect?
56. {?
57. ????//?Drawing?code?
58. }?
59. */??
60. ??
61. @end??

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2.APPLE private method.

[self.yourTextField?setValue:[NSNumber?numberWithInt:5]?forKey:@"_paddingTop"];

[self.yourTextField?setValue:[NSNumber?numberWithInt:5]?forKey:@"_paddingLeft"];

[self.yourTextField?setValue:[NSNumber?numberWithInt:5]?forKey:@"_paddingBottom"];

[self.yourTextField?setValue:[NSNumber?numberWithInt:5]?forKey:@"_paddingRight"];

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