【代码笔记】按钮带下划线的写法

一，效果图。

二，工程图。

三，代码。

RootViewController.h

RootViewController.m

- (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view. //初始化按钮
 [self initRegisterButton]; } #pragma -mark -funcitons
-(void)initRegisterButton { //注册账号按钮
    UIButton *registerButton=[UIButton buttonWithType:UIButtonTypeRoundedRect]; registerButton.frame=CGRectMake(50,100, 100, 20); registerButton.backgroundColor=[UIColor clearColor]; [registerButton setTitle:@"注册账号" forState:UIControlStateNormal]; [registerButton addTarget:self action:@selector(doClickRegisterButton:) forControlEvents:UIControlEventTouchUpInside]; registerButton.titleLabel.textColor=[UIColor colorWithRed:144.0/255.0 green:144.0/255.0 blue:144.0/255.0 alpha:0.8]; [self.view addSubview:registerButton]; //注册账号下的线
    UIImageView *line=[[UIImageView alloc]initWithFrame:CGRectMake(registerButton.frame.origin.x+10, registerButton.frame.origin.y+registerButton.frame.size.height, 100, 1)]; line.backgroundColor=[UIColor colorWithRed:144.0/255.0 green:144.0/255.0 blue:144.0/255.0 alpha:0.3]; [self.view addSubview:line]; } #pragma -mark -doClickButton
-(void)doClickRegisterButton:(UIButton *)btn { NSLog(@"--doClickRegisterButton--"); }