iOS开发-代码的基本使用

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// ViewController.m

// 05-用代码创建按钮

// Created by vic fan on 2017/7/30.

#import “ViewController.h”

@interface ViewController ()

@end

@implementation ViewController

//视图加载完毕后调用,一般用来初始化(添加)控件,这个方法是系统主动调用的

– (void)viewDidLoad {

[super viewDidLoad];

//1.创建一个按钮对象

UIButton *headBtn = [[UIButton alloc]init];

//2.设置按钮的frame

headBtn.frame = CGRectMake(30, 30, 120, 120);

//3.添加到视图上

[self.view addSubview:headBtn];

//4.设置图片

//4.1 设置普通状态的图片

UIImage *nomalImage = [UIImage imageNamed:@”btn_01″];

[headBtn setBackgroundImage:nomalImage forState:UIControlStateNormal];

UIImage *hightImage = [UIImage imageNamed:@”btn_02″];

[headBtn setBackgroundImage:hightImage forState:UIControlStateHighlighted];

//5.设置文字

//5.1 设置普通状态下的文字

[headBtn setTitle:@”摸我吧“ forState:UIControlStateNormal];

//设置高亮状态的文字

[headBtn setTitle:@”摸我干啥“ forState:UIControlStateHighlighted];

//6.设置文字颜色

[headBtn setTitleColor:[UIColor redColor] forState:UIControlStateNormal];

//设置高亮状态文字颜色

[headBtn setTitleColor:[UIColor blueColor] forState:UIControlStateHighlighted];

//7 添加按钮的点击事件

// forControlEvents 监听的是什么事件

[headBtn addTarget:self action:@selector(benClicked) forControlEvents:UIControlEventTouchUpInside];

}

– (void)benClicked{

NSLog(@”我们快下课了“);

}

– (void)didReceiveMemoryWarning {

[super didReceiveMemoryWarning];

// Dispose of any resources that can be recreated.

}

@end