Swiftでタップ、ドラッグした箇所にViewを移動させる

Swift

2022年6月2日

Swiftでタップ、ドラッグした箇所にViewを移動させる方法です。 ViewController でタッチのイベントを検出し、その箇所にViewを移動させています。

Preview

UIViewController.swift

import UIKit

class ViewController: UIViewController {
    let imageView = UIImageView()
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        view.backgroundColor = .white
        
        imageView.image = UIImage(named: "icon")
        imageView.frame = CGRect(x: 100, y: 100, width: 100, height: 100)
        view.addSubview(imageView)
    }
    
    override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
        if let touch = touches.first {
            let point = touch.location(in: self.view)
            imageView.center = point
        }
    }
    
    override open func touchesMoved(_ touches: Set<UITouch>, with event: UIEvent?) {
        if let touch = touches.first {
            let point = touch.location(in: self.view)
            imageView.center = point
        }
    }
    
    override open func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {
        if let touch = touches.first {
            let point = touch.location(in: self.view)
            imageView.center = point
        }
    }
}