iOS开发之手动布局子视图

释放双眼,带上耳机,听听看~!

iOS开发之手动布局子视图,大家了解吗?其实视图布局采用是的砖石结构,但是图片的文字都是不固定的,下文是技术狗小编为大家带来的介绍,希望能帮到您。

手动布局子视图;
下面先看下效果图,我们今天要实现的效果:

这里我们默认用storyboard启动:
首先我们要在白色的屏幕上面创建一个父视图SuperView(蓝色的背景),在父视图里面创建四个小视图(橘黄色的背景)
下面看代码,
在SuperView.h文件里面:

#import <UIKit/UIKit.h>
@interface SuperView : UIView{
UIView * _view01;
UIView * _view02;
UIView * _view03;
UIView * _view04;
}
//声明创建视图函数
-(void) createSubViews;
@end
在SuperView.m文件里面:
#import "SuperView.h"
@interface SuperView ()
@end
@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];
}
//当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
//手动调整子视图的位置
-(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(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];
}
@end

在ViewController.m文件里面:

#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.
//创建一个父视图
SuperView * sView = [[SuperView alloc]init];
sView.frame = CGRectMake(20, 20, 180, 280);
//父视图调用函数创建四个小视图
[sView createSubViews];
sView.backgroundColor = [UIColor blueColor];
[self.view addSubview:sView];
UIButton * btn01 = [UIButton buttonWithType:UIButtonTypeRoundedRect];
btn01.frame = CGRectMake(240, 480, 80, 40);
[btn01 setTitle:@"放大" forState:UIControlStateNormal];
[btn01 addTarget:self action:@selector(pressLarge) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:btn01];
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;
}
//放大父视图
-(void) pressLarge{
SuperView * sView = (SuperView*)[self.view viewWithTag:101];
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:1];
sView.frame=CGRectMake(20, 20, 280, 400);
[UIView commitAnimations];
}
//缩小父视图
-(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];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end

以上就是iOS开发之手动布局子视图的全部介绍,其实学习的方法有多种多样,小伙伴们可以通过js.aizhan.com来了解更加详细的知识哦。

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