鍵盤縮回

鍵盤縮回大概有2種，一種是按鍵盤上的return後縮回，一種是點擊螢幕任一點縮回。

按return縮回有3步驟

1. 符合UITextFieldDelegate

class SettingVC: UIViewController,UITextFieldDelegate {...

2. 將自己設為textField.delegate的屬性

override func viewDidLoad() {
super.viewDidLoad()
ipTxt.delegate = self
}

3. 實作textFieldShouldReturn方法

func textFieldShouldReturn(_ textField: UITextField) -> Bool {
ipTxt.resignFirstResponder()
return true

螢幕任一點鍵盤縮回只要touchesBegan就能完成

override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
self.view.endEditing(true)
}