iOS开发系列——纯代码实现iOS开发

//  KCAppDelegate.m
//  IOSByCode
//
//  Created by Kenshin Cui on 14-2-23.
//  Copyright (c) 2014年 Kenshin Cui. All rights reserved.
//

#import "KCAppDelegate.h"

@implementation KCAppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    // Override point for customization after application launch.
    self.window.backgroundColor = [UIColor whiteColor];
    [self.window makeKeyAndVisible];
    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

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    //设置window属性（在KCAppDelegate中定义的window属性），初始化windows的大小和位置
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    // Override point for customization after application launch.
    //设置window的背景
    self.window.backgroundColor = [UIColor whiteColor];
    
    //初始化KCMainViewController
    KCMainViewController *mainController=[[KCMainViewController alloc]init];
    //设置自定义控制器的大小和window相同，位置为（0，0）
    mainController.view.frame=self.window.bounds;
    //设置此控制器为window的根控制器
    self.window.rootViewController=mainController;
    
    //设置window为应用程序主窗口并设为可见
    [self.window makeKeyAndVisible];
    return YES;
}

//
//  KCMainViewController.h
//  IOSByCode
//
//  Created by Kenshin Cui on 14-2-23.
//  Copyright (c) 2014年 Kenshin Cui. All rights reserved.
//

#import <UIKit/UIKit.h>

@interface KCMainViewController : UIViewController

#pragma mark logo
@property (nonatomic,strong) UIImageView *logo;
#pragma mark 手机号码
@property (nonatomic,strong) UITextField *phoneNumber;
#pragma mark 密码
@property (nonatomic,strong) UITextField *password;
#pragma mark 登录按钮
@property (nonatomic,strong) UIButton *loginButton;

#pragma mark 点击事件
-(void)login:(UIButton *)btn;

@end

//
//  KCMainViewController.m
//  IOSByCode
//
//  Created by Kenshin Cui on 14-2-23.
//  Copyright (c) 2014年 Kenshin Cui. All rights reserved.
//

#import "KCMainViewController.h"

@interface KCMainViewController ()

@end

@implementation KCMainViewController

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
    }
    return self;
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    //self.view.backgroundColor=[UIColor redColor];
    
    //添加图片
    CGRect logoRect=CGRectMake(100, 50, 100, 200);
    _logo=[[UIImageView alloc]initWithImage:[UIImage imageNamed:@"LoginBackground.png"]];//设置图片
    _logo.contentMode=UIViewContentModeScaleAspectFit;//设置内容填充模式
    _logo.frame=logoRect;//设置控件大小和位置（相对于父控件的位置）
    [self.view addSubview:_logo];//添加到KCMainViewController的View中
    
    //添加手机号码输入框
    CGRect phoneNumberRect=CGRectMake(20, 320, 280, 30);
    _phoneNumber=[[UITextField alloc]initWithFrame:phoneNumberRect];
    _phoneNumber.borderStyle=UITextBorderStyleRoundedRect;//设置文本框的边框样式
    [self.view addSubview:_phoneNumber];
    
    //添加密码输入框
    CGRect passwordRect=CGRectMake(20, 380, 280, 30);
    _password=[[UITextField alloc]initWithFrame:passwordRect];
    _password.borderStyle=UITextBorderStyleRoundedRect;
    [self.view addSubview:_password];
    
    //添加登录按钮
    CGRect loginButtonRect=CGRectMake(10, 440, 300, 25);
    _loginButton=[[UIButton alloc]initWithFrame:loginButtonRect];
    [_loginButton setTitleColor:[UIColor blueColor] forState:UIControlStateNormal];//设置标题内容颜色
    [_loginButton setTitle:@"登录" forState:UIControlStateNormal];//设置按钮标题
    [_loginButton addTarget:self action:@selector(login:) forControlEvents:UIControlEventTouchUpInside];//添加点击事件
    [self.view addSubview:_loginButton];
}

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

-(void)login:(UIButton *)btn{
    if ([_phoneNumber.text isEqual:@"123"]&&[_password.text isEqual:@"456"]) {
        NSLog(@"登录成功！");
    }else{
        NSLog(@"登录失败！");
    }
}


@end