Software Keyboard

software keyboard

➥Return key

import UIKit

class ReturnKeyViewController: UIViewController {
   
   @IBOutlet weak var firstInputField: UITextField!
   
   @IBOutlet weak var secondInputField: UITextField!
   
   
   override func viewDidLoad() {
      super.viewDidLoad()
    secondInputField.enablesReturnKeyAutomatically = true
    
    
   }
}

// 리턴키를 탭할때마다 호출됨
extension ReturnKeyViewController: UITextFieldDelegate {
    func textFieldShouldReturn(_ textField: UITextField) -> Bool {
        // 두 텍스트 필드가 동일한 뷰 컨트롤러를 델리게이트를 지정했기때문에 첫번째 파라미터를 기준으로 분기해야함 switch
        switch textField {
        case firstInputField:
            secondInputField.becomeFirstResponder()
        case secondInputField:
            guard let keyword = secondInputField.text else { return true }
            
            guard let url = URL(string: "http://www.google.com/m/search?q=\(keyword)") else {
                return true
            }
            
            // 위에 url를 모바일 사파리로 전달해서 검색하는 기능 구현
            if UIApplication.shared.canOpenURL(url) {
                UIApplication.shared.open(url, options: [:], completionHandler: nil)
            }
        default:
            break
        }
        return true // 보통 true를 리턴
    }
}

Keyboard Notification

import UIKit

class KeyboardNotificationViewController: UIViewController {
   
   @IBOutlet var textView: UITextView!
   
   override func viewDidLoad() {
      super.viewDidLoad()
      
    NotificationCenter.default.addObserver(forName: NSNotification.Name.UIKeyboardWillShow, object: nil, queue: OperationQueue.main) { (noti) in
        
        guard let userInfo = noti.userInfo else { return }
        
        guard let bounds = userInfo[UIKeyboardFrameEndUserInfoKey] as? CGRect else { return }
        
        var inset = self.textView.textContainerInset
//        inset.bottom = 350
        inset.bottom = bounds.height
        self.textView.textContainerInset = inset
        self.textView.scrollIndicatorInsets = inset
    }
    
    NotificationCenter.default.addObserver(forName: NSNotification.Name.UIKeyboardWillHide, object: nil, queue: OperationQueue.main) { (noti) in
        var inset = self.textView.textContainerInset
        inset.bottom = 8
        self.textView.textContainerInset = inset
        self.textView.scrollIndicatorInsets = inset
    }
   }
}