输入！按键 UIButton

UIButton 负责与触控事件做互动，将按下结果透过事件方式产生，它继承了UIControl并提供设定标题文字、外观…等，以下用程式方式产生UIButton需要的功能。

执行结果

Log

onClickButton 事件
Tag:1

Swift 程式范例

//-----------start-----------
//
//  ViewController.swift
//
//

import UIKit

class ViewController: UIViewController {


    let dyButton: UIButton = UIButton()

    override func viewDidLoad() {
        super.viewDidLoad()

        // 初始化
        dyButton.frame = CGRectMake(0,0,200,40)

        // 设定背景颜色
        dyButton.backgroundColor = UIColor.brownColor()

        // 遮罩功能是否开启
        dyButton.layer.masksToBounds = true

        // 遮罩功能开启后指定圆角大小
        dyButton.layer.cornerRadius = 10.0

        //设定正常状态下显示的文字
        dyButton.setTitle("正常", forState: UIControlState.Normal)

        //设定正常状态下文字的颜色
        dyButton.setTitleColor(UIColor.whiteColor(), forState: UIControlState.Normal)

        //设定按下状态下显示的文字
        dyButton.setTitle("按下", forState: UIControlState.Highlighted)
        //设定按下状态下文字的颜色
        dyButton.setTitleColor(UIColor.blackColor(), forState: UIControlState.Highlighted)

        // layer座标指定，init Button时会将Layer座标设定与frame相同
        dyButton.layer.position = CGPoint(x: self.view.frame.width/2, y:100)

        //设定tag
        dyButton.tag = 1

        //增加Click事件回呼,TouchUpInside 意指手指按下后离开产生的事件
        dyButton.addTarget(self, action: "onClickButton:", forControlEvents: .TouchUpInside)

        // 将设定好的Button加入原本的view
        self.view.addSubview(dyButton)
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
    }

    //Button按下按键后会执行此function
    func onClickButton(sender: UIButton){
        println("onClickButton 事件")
        println("Tag:\(sender.tag)")

    }
}

//------------end------------

Objective-C 程式范例

//-----------start-----------
//
//  ViewController.m
//
//
//

#import "ViewController.h"
#import <UIKit/UIKit.h>

@interface ViewController ()

@end

@implementation ViewController
{
    UIButton *dyButton;
}

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    // 初始化
    dyButton = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 200, 40)];
    dyButton.backgroundColor = [UIColor brownColor];
    dyButton.layer.masksToBounds = TRUE;
    dyButton.layer.cornerRadius = 10.0;
    [dyButton setTitle:@"正常" forState: UIControlStateNormal];
    [dyButton setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
    [dyButton setTitle:@"按下" forState: UIControlStateHighlighted];
    [dyButton setTitleColor:[UIColor blackColor] forState:UIControlStateHighlighted];
    dyButton.layer.position = CGPointMake(self.view.frame.size.width/2, 100);
    dyButton.tag = 1;
    [dyButton addTarget:self action:@selector(onClickButton:) forControlEvents:UIControlEventTouchUpInside];


    [self.view addSubview:dyButton];
}

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

- (IBAction)onClickButton:(id)sender {

    NSLog(@"onClickButton 事件");
    NSLog(@"Tag:\(sender.tag)");

}


@end

//------------end------------

参考资料

UIButton Class