IOS第一个App应用源代码（ArtPage）

#import "AppDelegate.h"
#import "ViewController.h"

@interface AppDelegate ()

@end

@implementation AppDelegate

//程序启动完成调用
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    //系统创建window
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    //在window上创建视图控制器
    self.window.rootViewController = [[ViewController alloc] init];
    //系统设置创建window的背景颜色
    self.window.backgroundColor = [UIColor blackColor];
    //设置为主窗口并显示出来
    [self.window makeKeyAndVisible];
    
    return YES;
}



#ifndef GlobalDefine_h
#define GlobalDefine_h

#define SCREENWIDTH [[UIScreen mainScreen] bounds].size.width
#define SCREENHEIGHT [[UIScreen mainScreen] bounds].size.height

#endif /* GlobalDefine_h */



#import <UIKit/UIKit.h>

@interface ViewController : UIViewController <UITextFieldDelegate>

@property (nonatomic, strong) UIImageView *imgViewHomePage;
@property (nonatomic, strong) UIImageView *imgViewLine1;
@property (nonatomic, strong) UIImageView *imgViewLine2;
@property (nonatomic, strong) UIImageView *imgViewLogin;
@property (nonatomic, strong) UIImageView *imgViewCancel;

@property (nonatomic, strong) UITextField *textFieldUserName;
@property (nonatomic, strong) UITextField *textFieldPassword;

@property (nonatomic, strong) UIButton *buttonLogin;
@property (nonatomic, strong) UIButton *buttonEmpty;

@end



#import "ViewController.h"
#import "SecondViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    //设置主页面
    _imgViewHomePage = [[UIImageView alloc] initWithFrame:CGRectMake(89, 92, 143, 48)];
    _imgViewHomePage.image = [UIImage imageNamed:@"img_首页Logo"];
    [self.view addSubview:_imgViewHomePage];
    
    //设置用户名线
    _imgViewLine1 = [[UIImageView alloc] initWithFrame:CGRectMake(45, 262, 230, 1)];
    _imgViewLine1.image = [UIImage imageNamed:@"img_首页输入框底线"];
    [self.view addSubview:_imgViewLine1];
    
    //设置密码线
    _imgViewLine2 = [[UIImageView alloc] initWithFrame:CGRectMake(45, 311, 230, 1)];
    _imgViewLine2.image = [UIImage imageNamed:@"img_首页输入框底线"];
    [self.view addSubview:_imgViewLine2];
    
    //设置登录imageView
    _imgViewLogin = [[UIImageView alloc] initWithFrame:CGRectMake(45, 323, 230, 47)];
    _imgViewLogin.image = [UIImage imageNamed:@"btn_登录_n"];
    [self.view addSubview:_imgViewLogin];
    
    //设置取消imageView
    _imgViewCancel = [[UIImageView alloc] initWithFrame:CGRectMake(252, 240, 22, 22)];
    _imgViewCancel.image = [UIImage imageNamed:@"btn_首页用户名取消"];
    [self.view addSubview:_imgViewCancel];
    
    //设置用户名TextField
    _textFieldUserName = [[UITextField alloc] initWithFrame:CGRectMake(45, 232, 230, 30)];
    //占位符
//    _textFieldUserName.placeholder = @"用户名";
    //设置占位符上字体的颜色！！！
    _textFieldUserName.attributedPlaceholder = [[NSAttributedString alloc] initWithString:@"用户名" attributes:[NSDictionary dictionaryWithObjectsAndKeys:[UIColor grayColor], NSForegroundColorAttributeName,nil]];//设置占位符上字体的颜色
    _textFieldUserName.textColor = [UIColor whiteColor];
    _textFieldUserName.delegate = self;//调用协议
    [self.view addSubview:_textFieldUserName];
    
    //设置密码TextField
    _textFieldPassword = [[UITextField alloc] initWithFrame:CGRectMake(45, 281, 230, 30)];
    NSDictionary *dic = [NSDictionary dictionaryWithObjectsAndKeys:[UIColor grayColor], NSForegroundColorAttributeName,nil];
    _textFieldPassword.attributedPlaceholder = [[NSAttributedString alloc] initWithString:@"密码" attributes:dic];
    _textFieldPassword.textColor = [UIColor whiteColor];
    //使用密文
    _textFieldPassword.secureTextEntry = YES;
    _textFieldPassword.delegate = self;
    [self.view addSubview:_textFieldPassword];
    
    //设置登录按钮
    _buttonLogin = [UIButton buttonWithType:UIButtonTypeCustom];
    _buttonLogin.frame = CGRectMake(45, 323, 230, 47);
    [self.view addSubview:_buttonLogin];
    //登录跳转
    [_buttonLogin addTarget:self action:@selector(next:) forControlEvents:UIControlEventTouchUpInside];
    
    //设置清空按钮
    _buttonEmpty = [UIButton buttonWithType:UIButtonTypeCustom];
    _buttonEmpty.frame = CGRectMake(252, 240, 22, 22);
    [self.view addSubview:_buttonEmpty];
    //清空用户名和密码：跳转
    [_buttonEmpty addTarget:self action:@selector(empty:) forControlEvents:UIControlEventTouchUpInside];
    
}

//清空用户名的方法
-(void)empty:(id)sender
{
    [_textFieldUserName setText:@""];
    [_textFieldPassword setText:@""];
    [_textFieldUserName isFirstResponder];
}

//登录跳转方法
- (void)next:(id)sender
{
    NSString *strUserName = @"Huashan";
    NSString *strPassWord = @"123456";
    if ([_textFieldUserName.text isEqualToString:strUserName] && [_textFieldPassword.text isEqualToString:strPassWord])
    {
        //跳到下一个界面
        SecondViewController *tempVC = [[SecondViewController alloc] init];
        [self presentViewController:tempVC animated:YES completion:nil];
    }
    else
    {
        //跳出输入错误提示框
        UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"警告" message:@"用户名或密码错误，请重新输入" preferredStyle:UIAlertControllerStyleAlert];
        UIAlertAction *okAction = [UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleDefault handler:nil];
        [alertController addAction:okAction];
        [self presentViewController:alertController animated:YES completion:nil];
    }
}

- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{
    [_textFieldUserName resignFirstResponder];
    [_textFieldPassword resignFirstResponder];
}

//点击文本框，界面随键盘出现，整体往上移动(关键词：UIView animate)
- (BOOL)textFieldShouldBeginEditing:(UITextField *)textField
{
    if (self.view.frame.origin.y == 0)
    {
        [UIView animateWithDuration:0.3 animations:^{
            self.view.frame = CGRectMake(self.view.frame.origin.x, self.view.frame.origin.y - 100, self.view.frame.size.width, self.view.frame.size.height);
        }];
    }
    return YES;
}
//随着键盘收缩，界面随着往下移动
- (BOOL)textFieldShouldEndEditing:(UITextField *)textField
{

    if (self.view.frame.origin.y == -100)
    {
        [UIView animateWithDuration:0.3 animations:^{
            self.view.frame = CGRectMake(self.view.frame.origin.x, self.view.frame.origin.y + 100, self.view.frame.size.width, self.view.frame.size.height);
        }];
    }
    return YES;
}


- (BOOL)textFieldShouldReturn:(UITextField *)textField//按下return键盘收缩
{
    [textField resignFirstResponder];
    return YES;
}

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

@end



#import <UIKit/UIKit.h>

@interface SecondViewController : UIViewController

@property (nonatomic, strong) UIScrollView *scrollView;
@property (nonatomic, strong) UIImageView *imgView;
@property (nonatomic, strong) UILabel *sortLabel;
@property (nonatomic, strong) UIButton *backButton;

@end



#import "SecondViewController.h"
#import "GlobalDefine.h"

@interface SecondViewController ()

@end

@implementation SecondViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    //设置滚动视图
    _scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, SCREENWIDTH, SCREENHEIGHT)];
    //滚动视图内容的宽高
    _scrollView.contentSize = CGSizeMake(SCREENWIDTH, SCREENHEIGHT * 4);
    //启用分页
    _scrollView.pagingEnabled = YES;
    //禁止弹动
    _scrollView.bounces = NO;
    [self.view addSubview:_scrollView];
    
    //添加4张图片,顺序上下
    for (int i = 1; i < 5; ++i)
    {
        _sortLabel = [[UILabel alloc] initWithFrame:CGRectMake(SCREENWIDTH / 2 - 100, SCREENHEIGHT - 50, 200, 30)];
        _sortLabel.textAlignment = NSTextAlignmentCenter;
        _sortLabel.textColor = [UIColor whiteColor];
        _sortLabel.font = [UIFont systemFontOfSize:15];
        
        _imgView = [[UIImageView alloc] initWithFrame:CGRectMake(0, SCREENHEIGHT * (i - 1), SCREENWIDTH, SCREENHEIGHT)];
        _imgView.image = [UIImage imageNamed:[NSString stringWithFormat:@"%d.jpg", i]];
        _sortLabel.text = [NSString stringWithFormat:@"这是第%d张图片", i];
        [_imgView addSubview:_sortLabel];
        [_scrollView addSubview:_imgView];
    }
    
    //退出（返回）
    _backButton = [UIButton buttonWithType:UIButtonTypeCustom];
    _backButton.frame = CGRectMake(30, 50, 60, 60);
    [_backButton setTitle:@"退出" forState:UIControlStateNormal];
    [_backButton setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
//    _backButton.tintColor = [UIColor whiteColor];
    _backButton.titleLabel.font = [UIFont systemFontOfSize:14];
    [self.view addSubview:_backButton];
    
    //退出跳转
    [_backButton addTarget:self action:@selector(back:) forControlEvents:UIControlEventTouchUpInside];
    
}

- (void)back:(id)sender
{
    [self dismissViewControllerAnimated:YES completion:nil];
}

- (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