擬似IMEっぽい何か

ime_ios.swift

import UIKit
import PlaygroundSupport
class ViewController: UIViewController {
    var label: UILabel?
    var textField: TextField?
    override func viewDidAppear(_ animated: Bool) {
        self.becomeFirstResponder()
    }
    
    override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
        print("HERE", touches.first?.view)
        if touches.first?.view == self.label {
            self.textField?.becomeFirstResponder()
        } else {
            self.textField?.resignFirstResponder()
        }
    }

    func subscribe(label: UILabel, textField: TextField) {
        self.label = label
        self.textField = textField
        
        textField.addTarget(self, action: #selector(textChanged), for: .editingChanged)

    }    

    @objc func textChanged() {
        self.label?.text = self.textField?.text
    }

}

class TextField: UITextField {
    override func hitTest(_ point: CGPoint, with event: UIEvent?) -> UIView? {
    return nil
    }
}

let myView = UIView()
let viewController = ViewController()
viewController.view = myView
PlaygroundPage.current.liveView = viewController

let size = CGSize(width: 500, height: 40)
let label = UILabel(frame: CGRect(origin:.zero, size: size))
label.text = "hello"
label.isUserInteractionEnabled = true
myView.addSubview(label)

let textField = TextField(frame: CGRect(origin: CGPoint(x: 0, y: 40), size: size))
textField.layer.backgroundColor = CGColor(gray: 0.8, alpha: 1.0)
viewController.subscribe(label: label, textField:textField)
myView.addSubview(textField)