iOS 第5课 frame 和bounds

0:首先还是通过纯的代码来实现

0：删除3个文件ViewController.h，ViewController.m，Main.storyboard

1：修改点击左边的蓝色按钮，然后选择general－》developer info－》main interface ，将这个main interface 晴空

2：然后再创建一个MainUIViewController ,它继承自UIViewController

1:AppDelegate.m的didfinshlaunchingwithoptions方法的更新

[csharp]  view plain  copy

 

 

1. - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {  
2.     // Override point for customization after application launch.  
3.     self.window = [[UIWindow alloc]initWithFrame:[UIScreen mainScreen].bounds];  
4.     [self.window setRootViewController:[[MyUIViewController alloc] init]];//相当于是android 里面的setcontentview  
5.     [self.window makeKeyAndVisible];  
6.       
7.     return YES;  
8. }  

2: 

//
//  MainUIViewController.m
//  FifthDemoFrameAndBounds
//
//  Created by 千雅爸爸 on 16/10/9.
//  Copyright © 2016年 kodulf. All rights reserved.
//

#import "MainUIViewController.h"

@interface MainUIViewController ()

@end

@implementation MainUIViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    [self.view setBackgroundColor:[UIColor greenColor]];
    
    //frame使用来给我们的视图控件去设置视图的气势的坐标和宽高的

    UIView *childView =[[UIView alloc]initWithFrame:CGRectMake(100, 100, 100, 100)];
    [childView setBackgroundColor:[UIColor yellowColor]];
    [self.view addSubview:childView];
    
    //bounds 的起始坐标永远都是0，0,这个最关键了
    //用来记录边界尺寸的,可以理解为就是边界，
    // default bounds is zero origin, frame size. animatable
    
    UIView *childView1 =[[UIView alloc]initWithFrame:childView.frame];//相当于(100, 100, 100, 100)
    [childView1 setBackgroundColor:[UIColor redColor]];
    [childView addSubview:childView1];
    

    UIView *childView2 =[[UIView alloc]initWithFrame:childView.bounds];//相当于（0，0，100，100）
    [childView2 setBackgroundColor:[UIColor blackColor]];
    [childView addSubview:childView2];
    
    
    
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

/*
#pragma mark - Navigation

// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
    // Get the new view controller using [segue destinationViewController].
    // Pass the selected object to the new view controller.
}
*/

@end