一、如图所示的界面,按钮One、Two、Three分别对应三个控制器的view,点击实现切换。个人感觉父子控制器的重点在于,控制器的view们之间建立了父子关系,控制器不建立的话,发生在view上面的事件,对应的view可能接收不到,控制器们建立了父子关系后,可以将事件传递给相应的控制器。

练习代码如下:

 1 #import "ViewController.h"
 2 #import "OneTableViewController.h"
 3 #import "TwoViewController.h"
 4 #import "ThreeViewController.h"
 5 
 6 @interface ViewController ()
 7 /** curView */
 8 @property(nonatomic,strong) UIViewController *curVC;
 9 /** old */
10 @property(nonatomic,assign) NSInteger oldIndex;
11 /** view */
12 @property(nonatomic,strong) UIView *contentView;
13 @end
14 
15 @implementation ViewController
16 
17 - (void)viewDidLoad {
18     [super viewDidLoad];
19     
20     // 不给按钮,只给view做动画的解决办法 -- 多用一个view将要动画的view包起来,动画添加到这个view上
21     UIView *contentView = [[UIView alloc] initWithFrame:CGRectMake(0, 64, self.view.bounds.size.width, self.view.bounds.size.height - 64)];
22     [self.view addSubview:contentView];
23     
24     self.contentView = contentView;
25     
26     [self addChildViewController:[[OneTableViewController alloc] init]];
27     [self addChildViewController:[[TwoViewController alloc] init]];
28     [self addChildViewController:[[ThreeViewController alloc] init]];
29     
30     
31 }
32 
33 - (IBAction)btnClick:(UIButton *)sender {
34     
35     // 移除当前的
36     [self.curVC.view removeFromSuperview];
37     
38     // 取出角标
39     NSInteger index = [sender.superview.subviews indexOfObject:sender];
40     // 根据角标从集合中取出相应的VC
41     self.curVC = self.childViewControllers[index];
42     
43     self.curVC.view.frame = self.contentView.bounds;
44     [self.contentView addSubview:self.curVC.view];
45     
46     
47     CATransition *anim = [CATransition animation];
48     anim.type = @"cube";
49     anim.subtype = index > self.oldIndex ? kCATransitionFromRight : kCATransitionFromLeft;
50     anim.duration = 0.5;
51     [self.contentView.layer addAnimation:anim forKey:nil];
52     self.oldIndex = index;
53     
54 }
55 
56 @end
View Code

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