第二个 代码使用button和输入框设置

//
//  ViewController.m
//  代码复习
//
//  Created by app on 15/5/17.
//  Copyright (c) 2015年 app. All rights reserved.
//

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    //1.设置按钮
   UIButton *btn =  [[UIButton alloc]init];
    btn.frame = CGRectMake(0, 0, 100, 100);
    //1.2设置普通点击的方式
    UIImage *nor = [UIImage imageNamed:@"btn_02.png"];
    [btn setBackgroundImage:nor forState:UIControlStateNormal];
    //1.3在 按钮上添加文字
    [btn setTitle:@"点我啊" forState:UIControlStateNormal];
    //1.4 普通状态下的字体颜色
    [btn setTitleColor:[UIColor redColor] forState:UIControlStateNormal];
    //1.5在高亮节所实现的效果 修改
    UIImage * sor=[UIImage imageNamed:@"aler.png"];
    [btn setBackgroundImage:sor forState:UIControlStateHighlighted];
    [btn setTitleColor:[UIColor greenColor] forState:UIControlStateHighlighted];
    
    //1.6添加输入框
    UITextField *leb= [[UITextField alloc]init];
    //1.6.1设置输入框大小
    leb.frame=CGRectMake(150, 150, 50, 20);
    //1.6.2设置输入框的背景颜色 使用点语法
    leb.backgroundColor = [UIColor yellowColor];
    //1.7 设置显示视图的中心
    CGFloat centerx = self.view.frame.size.width * 0.5;
    CGFloat centery = self.view.frame.size.height *0.5;
    btn.center =   CGPointMake(centerx, centery);
    //2.使控件在视图上实现
    [self.view addSubview:btn];
    [self.view addSubview:leb];
    
    // Do any additional setup after loading the view, typically from a nib.
}

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

@end