自定义UISwitch

ViewController.m

 1 #import "ViewController.h"
 2 #import "MyUISwitch.h"
 3 @interface ViewController ()
 4             
 5 
 6 @end
 7 
 8 @implementation ViewController
 9             
10 - (void)viewDidLoad {
11     [super viewDidLoad];
12     
13     UISwitch* sw = [[UISwitch alloc]initWithFrame:CGRectMake(200, 100, 0, 0)];
14     [self.view addSubview:sw];
15     
16     MyUISwitch* s = [[MyUISwitch alloc]initWithFrame:CGRectMake(100, 100, 0, 0)];
17     [self.view addSubview:s];
18     
19     
20 }

MyUISwitch.h

1 #import <UIKit/UIKit.h>
2 
3 @interface MyUISwitch : UIControl
4 @property (nonatomic,assign,getter=isOn) BOOL on;
5 @end

MyUISwitch.m

 1 #import "MyUISwitch.h"
 2 
 3 @implementation MyUISwitch
 4 
 5 - (instancetype)init{
 6     return [self initWithFrame:CGRectZero];
 7 }
 8 
 9 - (instancetype)initWithFrame:(CGRect)frame
10 {
11     frame.size.width = 49;
12     frame.size.height = 31;
13     self = [super initWithFrame:frame];
14     if (self) {
15         UIView* backView = [[UIView alloc]initWithFrame:self.bounds];
16         backView.backgroundColor = [UIColor greenColor];
17         backView .tag = 99;
18         backView.layer.cornerRadius = 15.5;
19         [self addSubview:backView];
20         
21         CGRect r = self.bounds;
22         r.origin.x = .5;
23         r.origin.y = .5;
24         r.size.height -= 1;
25         r.size.width -= .5;
26         UIView* offBackView = [[UIView alloc]initWithFrame:r];
27         offBackView.backgroundColor = [UIColor whiteColor];
28         offBackView.tag = 100;
29         offBackView.layer.cornerRadius = 16;
30         [self addSubview:offBackView];
31         
32         UIView* thumb = [[UIView alloc]initWithFrame:CGRectMake(0, 0, 30, 30)];
33         thumb.layer.cornerRadius = 15;
34         thumb.tag= 101;
35         thumb.backgroundColor = [UIColor whiteColor];
36         thumb.layer.borderWidth = 0.5;
37         thumb.layer.borderColor = [UIColor grayColor].CGColor;
38         [self addSubview:thumb];
39     }
40     return self;
41 }
42 -(void)setFrame:(CGRect)frame{
43     frame.size.width = 49;
44     frame.size.height = 31;
45     [super setFrame:frame];
46 }
47 -(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{
48      // thumb frame
49 }
50 -(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event{
51     // UITouch *touch = [touches anyObject];
52     // CGPoint p = [touch locationInView:self];
53     _on =! _on;
54     UIView* thumb = [self viewWithTag:101];
55     UIView* back = [self viewWithTag:99];
56     UIView* off = [self viewWithTag:100];
57     
58     [UIView animateWithDuration:.2 animations:^{
59     if (_on) {
60         thumb.center = CGPointMake(self.frame.size.width-thumb.frame.size.width/2,thumb.center.y);
61     }else{
62         back.backgroundColor = [UIColor greenColor];
63         thumb.center = CGPointMake(thumb.frame.size.width/2, thumb.center.y);
64     }}];
65     off.hidden= _on;
66 }
67 
68 @end