iOS_Back_1

ButtonAction & LabelOutlet

1. prepare an Apple ID, Apple Devloper's Account and team_name for Project.

2. install xcode 10+ (for iOS 12 beta later) and use swift version 4+.

    //  ViewController.swift
    //  the StoryBoard's properties named class shall correspond with controller's name
    //  KatesiOSApp2021
    //
    //  Created by KatesAndroid on 2021/1/26.
    //
   
    import UIKit
    import AVFoundation
   
    class MainPage: UIViewController {
   
   
        @IBOutlet weak var showText: UILabel!
   
   
   
        override func viewDidLoad() {
            super.viewDidLoad()
            // Do any additional setup after loading the view
   
        }
   
   
        @IBAction func onCick(_ sender: Any) {
   
            showText.text = "I luv mobile app so much, miss you. :)"
   
        }
   
   
    }
   

3. snapshot.

3. iOS' hot key.

   • UI Object Lib:

      cmd + shift + L
     

   • Double View for storyboard and Code:

      ctrl + opt + cmd + enter 
     

   • drag UI element on Storyboard as Variable in Code:

      two fingers on Mac mouse.