本节学习内容：
1.子视图布局的概念
2.视图布局的创建实现
3.手动布局视图的实现
1.创建一个父视图 命名为SuperView生成，Superview.h与SuperView.m两个文件
【Superview.h】
import<UIKit/UIKit.h>
@interface SuperView:UIView{
UIView* _view01;
UIView* _view02;
UIView* _view05;
UIView* _view04;
UIView* _view05;
}
-(void) createsubViews;
@end
【Superview.m】
#import"SuperView.h"
@implementation SuperView
-(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);
//右下角视图
_view03=[[UIView alloc]init];
_view03.frame=CGRectMake(self.bounds.size.width-40,self.bounds.size.height-40,40,40);
//左下角视图
_view04=[[UIView alloc]init];
_view04.frame=CGRectMake(0,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];
}
//需要重新布局时调用此函数，通过此函数重新设定子视图的位置，手动调整子视图位置
-(void)layoutSubvies{
[UIView beginanimations:nill 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(self.bounds.size.width-40,self.bounds.size.height-40,40,40);
_view04.frame=CGRectMake(0,self.bounds.size.height-40,40,40);
[UIView commitAnimations];
}
【ViewController.m】
#import"ViewController.h";
#import"SuperView.h";
@interface ViewController()
@end
@implementation ViewController
-(void)viewDidLoad{
[super ViewdidLoad];
//创建一个父亲视图
SuperView* sView=[[SuperView allock]init];
sView.frame=CGRectMake(20,20,180,280);
[sView createSubViews];
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(240,520,0,40);
[btn02 setTitle:@"缩小" forState:UIControlStateNormal];
[btn02 addTarget:sef action:@selector(pressSmall)forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:btn02];
sView.tag=101;
}
//放大父亲视图
-(void)pressLarge{
//放大父亲视图动画
SuperView* SView=(SuperView*)[self.view viewWithTag:101];
[UIView beginanimations:nill context:nil];
[UIView setAnimationDuration:1];
sView.frame=CGRectMake(20,20,300,480);
[UIView commitAnimations];
}
//缩小父亲视图
-(void)pressSmall{
SuperView* SView=(SuperView*)[self.view viewWithTag:101];
[UIView beginanimations:nill context:nil];
[UIView setAnimationDuration:1];
sView.frame=CGRectMake(20,20,180,280);
[UIView commitAnimations];
}
