往UISegmentedControl上添加几个控制器

 1 #import "RootViewController.h"
 2 #import "LoginViewController.h"
 3 #import "RegistViewController.h"
 4 #import "PasswardViewController.h"
 5 #import "RootView.h"
 6 
 7 @interface RootViewController ()
 8 @property (nonatomic, strong) RootView *rootView;
 9 @property (nonatomic, strong) LoginViewController *loginVC;
10 @property (nonatomic, strong) RegistViewController *registVC;
11 @property (nonatomic, strong) PasswardViewController *passwardVC;
12 
13 @end
14 
15 @implementation RootViewController
16 
17 - (void)loadView {
18     self.rootView = [[RootView alloc] initWithFrame:[UIScreen mainScreen].bounds];
19     self.view = self.rootView;
20     
21 }
22 
23 
24 - (void)viewDidLoad {
25     [super viewDidLoad];
26     
27     // 初始化视图控制器
28     self.loginVC = [[LoginViewController alloc] init];
29     self.registVC = [[RegistViewController alloc] init];
30     self.passwardVC = [[PasswardViewController alloc] init];
31     
32     
33     // segment添加一个事件
34     [self.rootView.segment addTarget:self action:@selector(click:) forControlEvents:UIControlEventValueChanged];
35     
36 }
37 
38 
39 // 实现点击事件
40 - (void)click:(UISegmentedControl *)sender {
41     
42     switch (sender.selectedSegmentIndex) {
43         case 0:
44             // 移除父视图中最上面的子视图
45             [[self.rootView.subviews objectAtIndex:0] removeFromSuperview];
46             
47             // 添加新视图
48             [self.rootView addSubview:self.loginVC.view];
49             
50             // 把分段选择器显示在最外层
51             [self.rootView bringSubviewToFront:self.rootView.segment];
52             break;
53             
54         case 1:
55             // 移除父视图中最上面的子视图
56             [[self.rootView.subviews objectAtIndex:0] removeFromSuperview];
57             
58             // 添加新视图
59             [self.rootView addSubview:self.registVC.view];
60             
61             // 把分段选择器显示在最外层
62             [self.rootView bringSubviewToFront:self.rootView.segment];
63             break;
64             
65         case 2:
66             // 移除父视图中最上面的子视图
67             [[self.rootView.subviews objectAtIndex:0] removeFromSuperview];
68             
69             // 添加新视图
70             [self.rootView addSubview:self.passwardVC.view];
71             
72             // 把分段选择器显示在最外层
73             [self.rootView bringSubviewToFront:self.rootView.segment];
74             break;
75             
76         default:
77             break;
78     }
79 }
80 @end