IOS学习之旅－UI基础设置

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#import "ViewController.h"

@interface ViewController ()

//声明顺序：全局变量、属性、方法

- (void)initailizeUserInterface; //初始化用户界面

@end

- (void)initailizeUserInterface; //初始化用户界面

@end

@implementation ViewController

- (void)viewDidLoad {

    [super viewDidLoad];

    [self initailizeUserInterface];

}

#pragma mark - init初始化

- (void)initailizeUserInterface {

    //设置视图背景颜色

    self.view.backgroundColor = [UIColor whiteColor];

//文本标签

    UILabel *titLadbel = [[UILabel alloc]initWithFrame:CGRectMake(80, 80, 220, 30)];

    titLadbel.backgroundColor = [UIColor clearColor];

    //设置文本标签显示内容

    titLadbel.text = @"QQ2015";

    //设置文本对齐方式

    titLadbel.textAlignment = NSTextAlignmentCenter;

    //添加到主视图

    [self.view addSubview:titLadbel];

//图片视图

    UIImageView *imageView = [[UIImageView alloc]initWithFrame:CGRectMake(140, 130, 100, 80)];

    imageView.backgroundColor = [UIColor redColor];

    //添加图片

    imageView.image = [UIImage imageNamed:@"image.jpg"];

    //设置圆角

    imageView.layer.cornerRadius = 40;

    //设置属性 超出视图部分不显示

    imageView.clipsToBounds = YES;

    [self.view addSubview:imageView];

//文本输入框

    UITextField *text1 = [[UITextField alloc]initWithFrame:CGRectMake(80, 220, 220, 30)];

    //设置边框样式

    text1.borderStyle = UITextBorderStyleLine;

    UITextField *text2 = [[UITextField alloc]initWithFrame:CGRectMake(80, 270, 220, 30)];

    text2.borderStyle = UITextBorderStyleLine;

    //清除模式

    text1.clearButtonMode = UITextFieldViewModeWhileEditing;

    text2.clearButtonMode = UITextFieldViewModeWhileEditing;

    //占位符提示

    text1.placeholder = @"请输入账号";

    text2.placeholder = @"请输入密码";

    //设置tag值 不能小于10

    text1.tag = 100;

    text2.tag = 101;

    [self.view addSubview:text1];

    [self.view addSubview:text2];

//按钮设置

    UIButton *login = [UIButton buttonWithType:UIButtonTypeSystem];

    //视图的位置和大小

    login.frame = CGRectMake(160, 350, 60, 60);

    login.backgroundColor = [UIColor brownColor];

    //设置按钮标题以及类型

    [login setTitle:@"登陆" forState:UIControlStateNormal];

    //添加事件监听

    //    addTarget触发按钮对象   action触发方法   forControlEvents 触发按钮行为

    [login addTarget:self action:@selector(respondsToButton:) forControlEvents:UIControlEventTouchUpInside];

    [self.view addSubview:login];

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

    testView.bounds = CGRectMake(0, 0, CGRectGetWidth(text1.bounds), CGRectGetHeight(text1.bounds));

    testView.center = CGPointMake(CGRectGetMidX(self.view.bounds), CGRectGetMaxY(login.frame) + 30);

    testView.backgroundColor = [UIColor yellowColor];

    [self.view addSubview:testView];

}

#pragma mark - responds event 触发事件

//处理按钮事件行为

- (void)respondsToButton : (UIButton *)sender {

    NSLog(@"%@", NSStringFromSelector(_cmd));

    //通过tag获取文本输入框

    //父视图管理子视图

    UITextField *accountField  = (UITextField *)[self.view viewWithTag:100];

    UITextField *passwordField = (UITextField *)[self.view viewWithTag:101];

    //获取文本输入的内容

    NSString *accountStr = accountField.text;

    NSString *passwordStr = passwordField.text;

    if ([accountStr isEqualToString:@"admin"] && [passwordStr isEqualToString:@"password"]) {

        NSLog(@"登陆成功");

        self.view.backgroundColor = [UIColor redColor];

    } else {

        NSLog(@"登陆失败");

    }

}

#pragma mark - responds touch 触摸

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

{

    //当用户触摸屏幕停止编辑

    [self.view endEditing:YES];

}

IOS学习之旅－UI基础设置

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原文地址：http://www.cnblogs.com/summerpopo/p/4626942.html