苹果开发之“swift简单按钮加1计数入门”

    打开Xcode工具，project建立Single View Application,选择Swift语言，进入到主要开发界面，点左边项目目录下的Main.storyboard,就可以界面了（首先选择iOS开发项目),拖拉加入button和label控件，按住control在show the assisant editor编辑页面下鼠标指引这两个控件拖拉，自动添加 @IBOutlet var outputlabel:UILabel!=UILabel() 注：=UILabel()后写，  currentcount=currentcount+1，  outputlabel.text="the button has been Clicked (currentcount) number of times"，  outputlabel.textColor=UIColor.blue

import UIKit

class ViewController: UIViewController {

    @IBOutlet var outputlabel: UILabel!=UILabel()
    var currentcount:integer_t=0
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

    @IBAction func ButtonLable(_ sender: UIButton) {
        currentcount=currentcount+1
        outputlabel.text="the button has been Clicked (currentcount) number of times"
        outputlabel.textColor=UIColor.blue
    }

}

button按钮弹出框，connecting选择action等