iOS aotoresizing的基本使用

//

//  ViewController.m

//  自动布局01

//

//  Created by 唐帅 on 16/4/16.

//  Copyright © 2016年 tang. All rights reserved.

//

#import "ViewController.h"

@interface ViewController ()

@property(nonatomic,weak)UIView *blueView;

@property(nonatomic,weak)UIView *redView;

@end

@implementation ViewController

- (void)viewDidLoad {

    [super viewDidLoad];

    

    UIView *blueView = [[UIView alloc]init];

    blueView.backgroundColor = [UIColor blueColor];

    blueView.frame = CGRectMake(100, 100, 100, 100);

    self.blueView = blueView;

    [self.view addSubview:blueView];

    

    

    UIView *redView = [[UIView alloc]init];

    redView.backgroundColor = [UIColor redColor];

    redView.frame = CGRectMake(25, 25, 50, 50);

    self.redView = redView;

    [blueView addSubview:redView];

    

    

//    给红色view添加约束

//    UIViewAutoresizingNone                 = 0,

//    UIViewAutoresizingFlexibleLeftMargin   = 1 << 0,

//    UIViewAutoresizingFlexibleRightMargin  = 1 << 2,

//    UIViewAutoresizingFlexibleTopMargin    = 1 << 3,

//    UIViewAutoresizingFlexibleBottomMargin = 1 << 5

    

    //让红色的view向右下跟随蓝色view移动

    self.redView.autoresizingMask = UIViewAutoresizingFlexibleLeftMargin|UIViewAutoresizingFlexibleTopMargin;

}

//触摸屏幕发生的事件

-(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event

{

    CGRect bounds = self.blueView.bounds;

    bounds.size.width += 50;

    bounds.size.height += 50;

    

    self.blueView.bounds = bounds;

    

    NSLog(@"%@",NSStringFromCGRect(self.blueView.bounds));

}

@end