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MyViewController

//
//  MyViewController.m
//  Demo1ForTest
//
//  Created by spare on 16/4/8.
//  Copyright © 2016年 spare. All rights reserved.
//

#import "MyViewController.h"
#import "ViewController2.h"

@interface MyViewController ()

@end

@implementation MyViewController

//用户开始点击

-(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{
//跳转到新的界面（VC）
    ViewController2 *v2=[[ViewController2 alloc]init];
//    [self presentViewController:v2 animate:YES completion:nil];
    [self presentViewController:v2 animated:YES completion:nil];
    

}

- (void)viewDidLoad {
    [super viewDidLoad];
    
    //什么时候调用？
    self.view.backgroundColor=[UIColor greenColor];
    //加个Hello Day02；
    //屏幕尺寸：
    CGSize screenSize=[UIScreen mainScreen].bounds.size;
    float height=screenSize.height;
    float width=screenSize.width;
    
    float h=100,w=40;
    
    UILabel *lable=[[UILabel alloc]init];
    lable.frame=CGRectMake(width/2-w/2, height/2-h/2,h, w);
    lable.backgroundColor=[UIColor lightGrayColor];

    lable.textAlignment=NSTextAlignmentCenter;
    lable.text=@"Hello Day02";
    
    [self.view addSubview:lable];
    
    
    
//    UILabel *label=[[UILabel alloc]initWithFrame:CGRectMake(100, 100, 200, 400)];
//    label.text=@"23424";
//    
//    [self.view addSubview:label];
////    
//    UIButton *button=[UIButton buttonWithType:UIButtonTypeSystem];
//    button.backgroundColor=[UIColor redColor];
//    button.frame=CGRectMake(10, 10, 100, 100);
//    
//    [button addTarget:self action: @selector(tapButton) forControlEvents:UIControlEventTouchUpInside];
//    [self.view addSubview:button];
    
    
    

    
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
    NSLog(@"didReceiveMemoryWarning内存警告");

}

-(void)viewWillAppear:(BOOL)animated{
    NSLog(@"viewWillAppear将要显示的时候……");
}
-(void) viewDidAppear:(BOOL)animated{

    NSLog(@"viewDidAppear已经显示的时候……");
}
-(void)viewWillDisappear:(BOOL)animated{
    NSLog(@"viewWillDisappear将要消失的时候……");
}

-(void)viewDidDisappear:(BOOL)animated{
   NSLog(@"viewDidDisappear已经消失的时候……");
}





//-(instancetype)init{
//    if(self=[super init]){
//        NSLog(@"self.view.bacgroud 已经设置……");
//       // self.view.backgroundColor=[UIColor redColor];
//    }
//    return self;
//    }

/*
#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

ViewController2

//
//  ViewController2.m
//  Demo1ForTest
//
//  Created by spare on 16/4/8.
//  Copyright © 2016年 spare. All rights reserved.
//

#import "ViewController2.h"

@interface ViewController2 ()

@end

@implementation ViewController2

-(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{
//回到之前的一个界面
    [self dismissViewControllerAnimated:YES completion:nil];

}

- (void)viewDidLoad {
    [super viewDidLoad];

    // Do any additional setup after loading the view.
    self.view.backgroundColor=[UIColor redColor];
}

- (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

AppDelegate

//
//  AppDelegate.m
//  Demo1ForTest
//
//  Created by spare on 16/4/8.
//  Copyright © 2016年 spare. All rights reserved.
//

#import "AppDelegate.h"
#import "MyViewController.h"

@interface AppDelegate ()

@end

@implementation AppDelegate


- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    /**自定义试图控制器*/
    self.window=[[UIWindow alloc]initWithFrame:[UIScreen mainScreen].bounds];
    //设置
    
    self.window.rootViewController=[[MyViewController alloc]init];
    
    [self.window makeKeyAndVisible];
    
    
    
    
//    UIWindow *window=[[UIWindow alloc]initWithFrame:[UIScreen mainScreen].bounds];
//    window.rootViewController=[[UIViewController alloc]init];
//    window.backgroundColor=[UIColor redColor];
//    [window makeKeyAndVisible0]

    
    self.window=[UIWindow new];
    self.window.frame=[[UIScreen mainScreen]bounds];
    self.window.backgroundColor=[UIColor grayColor];
    
    MyViewController *vc=[MyViewController new];
    self.window.rootViewController=vc;
    
    
//    [self.window ]
    [self.window makeKeyAndVisible];
//
//    
//    // Override point for customization after application launch.
    return YES;
}

- (void)applicationWillResignActive:(UIApplication *)application {
    // Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.
    // Use this method to pause ongoing tasks, disable timers, and throttle down OpenGL ES frame rates. Games should use this method to pause the game.
}

- (void)applicationDidEnterBackground:(UIApplication *)application {
    // Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later.
    // If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
}

- (void)applicationWillEnterForeground:(UIApplication *)application {
    // Called as part of the transition from the background to the inactive state; here you can undo many of the changes made on entering the background.
}

- (void)applicationDidBecomeActive:(UIApplication *)application {
    // Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
}

- (void)applicationWillTerminate:(UIApplication *)application {
    // Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
}

@end