067改变UISwitch文本和颜色（扩展知识：更好的自定义做法是用继承UISlider实现，这里未做）

效果如下：

ViewController.h

1 #import <UIKit/UIKit.h>

2 

3 @interface ViewController : UIViewController

4 @end

ViewController.m

 1 #import "ViewController.h"

 2 #import "KMSwitch.h"

 3 

 4 @interface ViewController ()

 5 - (void)layoutUI;

 6 @end

 7 

 8 @implementation ViewController

 9 

10 - (void)viewDidLoad {

11     [super viewDidLoad];

12     

13     [self layoutUI];

14 }

15 

16 - (void)didReceiveMemoryWarning {

17     [super didReceiveMemoryWarning];

18     // Dispose of any resources that can be recreated.

19 }

20 

21 - (void)layoutUI {

22     //自定义开关1

23     KMSwitch *swtCustom = [[KMSwitch alloc] initWithFrame:CGRectZero];

24     CGPoint newPoint = self.view.center;

25     swtCustom.center = newPoint;

26     [swtCustom setLeftLabelText:@"否"

27                           color:[UIColor grayColor]

28                            font:[UIFont boldSystemFontOfSize:14.0f]];

29     [swtCustom setRightLabelText:@"是"

30                           color:[UIColor whiteColor]

31                            font:[UIFont boldSystemFontOfSize:14.0f]];

32     [self.view addSubview:swtCustom];

33     

34     //自定义开关2

35     swtCustom = [[KMSwitch alloc] initWithFrame:CGRectZero];

36     newPoint.y += 40;

37     swtCustom.center = newPoint;

38     [swtCustom setLeftLabelText:@"N"

39                           color:[UIColor redColor]

40                            font:[UIFont boldSystemFontOfSize:15.0f]];

41     [swtCustom setRightLabelText:@"Y"

42                            color:[UIColor blueColor]

43                             font:[UIFont boldSystemFontOfSize:15.0f]];

44     [self.view addSubview:swtCustom];

45 }

46 

47 @end

KMSwitch.h

 1 #import <UIKit/UIKit.h>

 2 

 3 @interface UISwitch (extended)

 4 - (void)setAlternateColors:(BOOL)boolean;

 5 @end

 6 

 7 @interface KMSwitch : UISwitch

 8 - (void)setLeftLabelText:(NSString *)labelText color:(UIColor *)labelColor font:(UIFont *)labelFont;

 9 - (void)setRightLabelText:(NSString *)labelText color:(UIColor *)labelColor font:(UIFont *)labelFont;

10 

11 @end

KMSwitch.m

 1 #import "KMSwitch.h"

 2 

 3 @interface KMSwitch ()

 4 - (UILabel *)createLabelWithText:(NSString *)labelText color:(UIColor *)labelColor font:(UIFont *)labelFont rect:(CGRect)rect;

 5 @end

 6 

 7 @implementation KMSwitch

 8 

 9 - (UIView *)slider {

10     return [[self subviews] lastObject];

11 }

12 

13 - (UIView *)textHolder {

14     return [[self slider] subviews][2];

15 }

16 

17 - (UIImageView *)leftView {

18     return [[self textHolder] subviews][0];

19 }

20 

21 - (UIImageView *)rightView {

22     return [[self textHolder] subviews][1];

23 }

24 

25 - (void)setLeftLabelText:(NSString *)labelText color:(UIColor *)labelColor font:(UIFont *)labelFont {

26     UIImageView *imgVLeft = [self leftView];

27     imgVLeft.image = nil;

28     imgVLeft.frame = CGRectMake(0, 0, 0, 0);

29     [imgVLeft addSubview:[self createLabelWithText:labelText

30                                              color:labelColor

31                                               font:labelFont

32                                               rect:CGRectMake(28, 5, 20, 20)]];

33 }

34 

35 - (void)setRightLabelText:(NSString *)labelText color:(UIColor *)labelColor font:(UIFont *)labelFont {

36     UIImageView *imgVRight = [self rightView];

37     imgVRight.image = nil;

38     imgVRight.frame = CGRectMake(0, 0, 0, 0);

39     [imgVRight addSubview:[self createLabelWithText:labelText

40                                               color:labelColor

41                                                font:labelFont

42                                                rect:CGRectMake(3, 5, 20, 20)]];

43 }

44 

45 - (UILabel *)createLabelWithText:(NSString *)labelText color:(UIColor *)labelColor font:(UIFont *)labelFont rect:(CGRect)rect {

46     UILabel *lbl = [[UILabel alloc] initWithFrame:rect];

47     lbl.text = labelText;

48     lbl.textColor = labelColor;

49     lbl.font = labelFont;

50     lbl.textAlignment = NSTextAlignmentCenter;

51     lbl.backgroundColor = [UIColor clearColor];

52     return lbl;

53 }

54 

55 @end