1. 创建一个父视图和多个子视图

新建一个类，叫做SuperView，作为父亲视图类。

在SuperView.h中创建子视图对象：

p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #d12f1b}p.p2 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; min-height: 13.0px}p.p3 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo}p.p4 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #bb2ca2}span.s1 {font-variant-ligatures: no-common-ligatures; color: #78492a}span.s2 {font-variant-ligatures: no-common-ligatures}span.s3 {font-variant-ligatures: no-common-ligatures; color: #bb2ca2}span.s4 {font-variant-ligatures: no-common-ligatures; color: #703daa}

#import <UIKit/UIKit.h>

@interface SuperView : UIView
{
    UIView* _view01;
    UIView* _view02;
    UIView* _view03;
    UIView* _view04;
    UIView* _view05;
}

-(void)createSubViews;

@end

在SuperView.m中实现创建子视图方法：

p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; min-height: 13.0px}p.p2 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #d12f1b}p.p3 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #bb2ca2}p.p4 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #008400}p.p5 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo}p.p6 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #703daa}p.p7 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #3d1d81}span.s1 {font-variant-ligatures: no-common-ligatures}span.s2 {font-variant-ligatures: no-common-ligatures; color: #78492a}span.s3 {font-variant-ligatures: no-common-ligatures; color: #000000}span.s4 {font-variant-ligatures: no-common-ligatures; color: #bb2ca2}span.s5 {font: 11.0px 'Heiti SC Light'; font-variant-ligatures: no-common-ligatures}span.s6 {font-variant-ligatures: no-common-ligatures; color: #4f8187}span.s7 {font-variant-ligatures: no-common-ligatures; color: #703daa}span.s8 {font-variant-ligatures: no-common-ligatures; color: #3d1d81}span.s9 {font-variant-ligatures: no-common-ligatures; color: #272ad8}

#import "SuperView.h"

@implementation SuperView

/*
// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
- (void)drawRect:(CGRect)rect {
    // Drawing code
}
*/

-(void)createSubViews
{
    //左上角视图
    _view01=[[UIView alloc]init];
    _view01.frame=CGRectMake(0, 0, 40, 40);
    
    
    //右上角视图
    _view02=[[UIView alloc]init];
    _view02.frame=CGRectMake(self.bounds.size.width-40, 0, 40, 40);

    //左下角视图
    _view03=[[UIView alloc]init];
    _view03.frame=CGRectMake(0, self.bounds.size.height-40, 40, 40);
    
    
    //右下角视图
    _view04=[[UIView alloc]init];
    _view04.frame=CGRectMake(self.bounds.size.width-40, self.bounds.size.height-40, 40, 40);
    
    
    _view01.backgroundColor=[UIColor orangeColor];
    _view02.backgroundColor=[UIColor orangeColor];
    _view03.backgroundColor=[UIColor orangeColor];
    _view04.backgroundColor=[UIColor orangeColor];
    
    [self addSubview:_view01];
    [self addSubview:_view02];
    [self addSubview:_view03];
    [self addSubview:_view04];
    
}

@end

之后在ViewController.m中创建父亲视图对象：
（注意：import SuperView.h）

p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #d12f1b}p.p2 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; min-height: 13.0px}p.p3 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #4f8187}p.p4 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #bb2ca2}p.p5 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo}p.p6 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #3d1d81}p.p7 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #008400}p.p8 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #703daa}p.p9 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #31595d}p.p10 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px 'Heiti SC Light'; color: #008400}span.s1 {font-variant-ligatures: no-common-ligatures; color: #78492a}span.s2 {font-variant-ligatures: no-common-ligatures}span.s3 {font-variant-ligatures: no-common-ligatures; color: #bb2ca2}span.s4 {font-variant-ligatures: no-common-ligatures; color: #000000}span.s5 {font-variant-ligatures: no-common-ligatures; color: #4f8187}span.s6 {font-variant-ligatures: no-common-ligatures; color: #3d1d81}span.s7 {font-variant-ligatures: no-common-ligatures; color: #703daa}span.s8 {font-variant-ligatures: no-common-ligatures; color: #272ad8}span.s9 {font-variant-ligatures: no-common-ligatures; color: #d12f1b}span.s10 {font: 11.0px 'Heiti SC Light'; font-variant-ligatures: no-common-ligatures; color: #d12f1b}span.s11 {font: 11.0px Menlo; font-variant-ligatures: no-common-ligatures}

#import "ViewController.h"
#import "SuperView.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {

    [super viewDidLoad];
    
    
    
    
    // Do any additional setup after loading the view, typically from a nib.
    SuperView* sView=[[SuperView alloc]init];
    sView.frame=CGRectMake(20,20 , 180, 280);
    sView.backgroundColor=[UIColor blueColor];
    [self.view addSubview:sView];
    
    
    
    UIButton* btn=[UIButton buttonWithType:UIButtonTypeRoundedRect];
    btn.frame=CGRectMake(240, 480, 80, 40);
    [btn setTitle:@"放大" forState:UIControlStateNormal];
    [btn addTarget:self action:@selector(pressLarge) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:btn];
    
    
    
    UIButton* btn02=[UIButton buttonWithType:UIButtonTypeRoundedRect];
    btn02.frame=CGRectMake(240, 520, 80, 40);
    [btn02 setTitle:@"缩小" forState:UIControlStateNormal];
    [btn02 addTarget:self action:@selector(pressSmall) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:btn02];
    
    sView.tag=101;
    
    [sView createSubViews];
    
}

//放大父亲视图
-(void)pressLarge
{
    SuperView* sView=(SuperView*)[self.view viewWithTag:101];
    [UIView beginAnimations:nil context:nil];
    [UIView setAnimationDuration:1];
    sView.frame=CGRectMake(20, 20, 300, 400);
    [UIView commitAnimations];
}

//缩小父亲视图
-(void)pressSmall
{
    SuperView* sView=(SuperView*)[self.view viewWithTag:101];
    [UIView beginAnimations:nil context:nil];
    [UIView setAnimationDuration:1];
    sView.frame=CGRectMake(20, 20, 180, 280);
    [UIView commitAnimations];
}

运行结果为：

屏幕快照 2016-11-22 下午10.50.33.png

屏幕快照 2016-11-22 下午10.50.38.png

可以看到子视图没有随着父亲视图放大而放大

2. 使子视图随父视图变化

在SuperView.m中添加：

p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; min-height: 13.0px}p.p2 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px 'Heiti SC Light'; color: #008400}p.p3 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo}p.p4 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #3d1d81}p.p5 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #703daa}span.s1 {font-variant-ligatures: no-common-ligatures}span.s2 {font: 11.0px Menlo; font-variant-ligatures: no-common-ligatures}span.s3 {font-variant-ligatures: no-common-ligatures; color: #bb2ca2}span.s4 {font-variant-ligatures: no-common-ligatures; color: #000000}span.s5 {font-variant-ligatures: no-common-ligatures; color: #703daa}span.s6 {font-variant-ligatures: no-common-ligatures; color: #272ad8}span.s7 {font-variant-ligatures: no-common-ligatures; color: #4f8187}span.s8 {font-variant-ligatures: no-common-ligatures; color: #3d1d81}

//当需要重新布局时
-(void)layoutSubviews
{
    [UIView beginAnimations:nil context:nil];
    [UIView setAnimationDuration:1];
    
    _view01.frame=CGRectMake(0, 0, 40, 40);
    _view02.frame=CGRectMake(self.bounds.size.width-40, 0, 40, 40);
    _view03.frame=CGRectMake(0, self.bounds.size.height-40, 40, 40);
    _view04.frame=CGRectMake(self.bounds.size.width-40, self.bounds.size.height-40, 40, 40);
    
    [UIView commitAnimations];
}

当需要调整布局时就调用layoutSubviews函数

运行结果为：

屏幕快照 2016-11-22 下午10.54.37.png

3. 自动布局

很简单，只需要用到UI控件的点方法：

p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #3d1d81}span.s1 {font-variant-ligatures: no-common-ligatures; color: #703daa}span.s2 {font-variant-ligatures: no-common-ligatures; color: #000000}span.s3 {font-variant-ligatures: no-common-ligatures}

XXX.autoresizingMask=UIViewAutoresizing.....