[iOS UIKit in Swift 4] UIActivityIndicator 사용하기

UIActivityIndicator 사용하기

아래 이미지와 소스코드를 비교해보시면 좀 더 이해하기 편합니다.

궁금하신점은 댓글로 달아주세요.

해피코딩 :)

Preview

Source

	//
	// ActivityIndicatorVC.swift
	// UIKit component handling
	//
	// Created by Taehyeon Han on 2018. 8. 9..
	// Copyright © 2018년 calmone. All rights reserved.
	//
	import UIKit
	class ActivityIndicatorVC: BaseViewController {
	lazy var activityIndicator: UIActivityIndicatorView = {
	// Create an indicator.
	let activityIndicator = UIActivityIndicatorView()
	activityIndicator.frame = CGRect(x: 0, y: 0, width: 50, height: 50)
	activityIndicator.center = self.view.center
	// Also show the indicator even when the animation is stopped.
	activityIndicator.hidesWhenStopped = false
	activityIndicator.activityIndicatorViewStyle = UIActivityIndicatorViewStyle.white
	// Start animation.
	activityIndicator.startAnimating()
	return activityIndicator
	}()
	lazy var button: UIButton = {
	// Create a button.
	let button = UIButton(frame: CGRect(x:0, y:0, width:60, height:60))
	button.backgroundColor = UIColor.red
	button.layer.masksToBounds = true
	button.layer.cornerRadius = 30.0
	button.setTitle("Stop", for: .normal)
	button.layer.position = CGPoint(x: self.view.bounds.width/2, y: self.view.bounds.height-50)
	button.addTarget(self, action: #selector(onClickButton(sender:)), for: .touchUpInside)
	return button
	}()
	override func viewDidLoad() {
	super.viewDidLoad()
	// Do any additional setup after loading the view.
	// Set the background color to black.
	self.view.backgroundColor = UIColor.black
	// Add UIActivityIndicatorView on view
	self.view.addSubview(self.activityIndicator)
	// Add UIButton on view
	self.view.addSubview(self.button)
	}
	override func didReceiveMemoryWarning() {
	super.didReceiveMemoryWarning()
	// Dispose of any resources that can be recreated.
	}
	// Button event.
	@objc func onClickButton(sender: UIButton){
	if self.activityIndicator.isAnimating {
	self.activityIndicator.stopAnimating()
	self.button.setTitle("Start", for: .normal)
	self.button.backgroundColor = UIColor.blue
	}
	else {
	self.activityIndicator.startAnimating()
	self.button.setTitle("Stop", for: .normal)
	self.button.backgroundColor = UIColor.red
	}
	}
	}

view raw ActivityIndicatorVC.swift hosted with ❤ by GitHub

Github

https://github.com/calmone/iOS-UIKit-component

Reference

• UIActivityIndicatorView
  https://developer.apple.com/reference/uikit/uiactivityindicatorview