import UIKit
class LoginViewController: UIViewController,UITextViewDelegate,UITextFieldDelegate {
@IBOutlet weak var TopView: UIView!
@IBOutlet weak var PasswordField: UITextField!
@IBOutlet weak var UserAccountField: UITextField!
@IBOutlet weak var LogInBtn: UIButton!
@IBOutlet weak var FB: UIButton!
@IBOutlet weak var Google: UIButton!
var singleFingerTap:UITapGestureRecognizer!
override func viewDidLoad() {
super.viewDidLoad()
//監聽鍵盤動作
NotificationCenter.default.addObserver(self, selector: #selector(LoginViewController.keyboardWasShown), name: NSNotification.Name.UIKeyboardWillShow, object: nil);
NotificationCenter.default.addObserver(self, selector: #selector(LoginViewController.keyboardWasHidden), name: NSNotification.Name.UIKeyboardWillHide, object: nil);
singleFingerTap = UITapGestureRecognizer.init(target: self, action: #selector(handleSingleTap));
self.UserAccountField.delegate = self;
self.PasswordField.delegate = self;
UserAccountField.clearButtonMode = .always;
PasswordField.clearButtonMode = .always;
FB.layer.cornerRadius = 5;
Google.layer.cornerRadius = 5;
LogInBtn.layer.cornerRadius = 5;
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
self.navigationController?.isNavigationBarHidden = true
}
@IBAction func LoginBtn(_ sender: UIButton) {
if((UserAccountField.text != "") && (PasswordField.text != "")){
if (self.isValidEmail(testStr: UserAccountField.text!) == false){
print("信箱格式錯誤");
let alertcontroller = UIAlertController(title: "Error", message: "The mailbox is malformed", preferredStyle: .alert);
let alertAction = UIAlertAction(title: "OK", style: .default, handler: nil);
alertcontroller.addAction(alertAction)
self.present(alertcontroller, animated: true, completion: nil)
}else{
//都有值登入
print("登入");
}
}else{
//帳號密碼為空時
if(UserAccountField.text == ""){
UserAccountField.attributedPlaceholder = NSAttributedString(string: "Please enter email", attributes: [NSForegroundColorAttributeName: UIColor.red]);
}
if(PasswordField.text == ""){
PasswordField.attributedPlaceholder = NSAttributedString(string: "Please enter password", attributes: [NSForegroundColorAttributeName: UIColor.red]);
}
}
}
@IBAction func FBBtn(_ sender: UIButton) {
}
@IBAction func GoogleBtn(_ sender: UIButton) {
}
// MARK: e-Mail檢查
func isValidEmail(testStr:String) -> Bool {
// print("validate calendar: \(testStr)")
let stricterFilter:Bool = false;
let stricterFilterString:String = "[A-Z0-9a-z\\._%+-]+@([A-Za-z0-9-]+\\.)+[A-Za-z]{2,4}"
let laxString:String = ".+@([A-Za-z0-9-]+\\.)+[A-Za-z]{2}[A-Za-z]*"
let emailRegex:String = stricterFilter ? stricterFilterString : laxString;
let emailTest = NSPredicate(format:"SELF MATCHES %@", emailRegex)
return emailTest.evaluate(with: testStr)
}
// MARK: TEXTField按下鍵盤return後動作
func textFieldShouldReturn(_ textField: UITextField) -> Bool {
textField.resignFirstResponder()
if(textField.isEqual(UserAccountField)){
PasswordField.becomeFirstResponder()
}else{
self.LoginBtn(.init(type: .custom))
}
return true;
}
//MARK: 鍵盤監聽動作（當用戶點view收起）
func keyboardWasShown(){
TopView.addGestureRecognizer(singleFingerTap);
}
func keyboardWasHidden(){
TopView.removeGestureRecognizer(singleFingerTap);
}
func handleSingleTap(){
//Do stuff here...
UserAccountField.resignFirstResponder()
PasswordField.resignFirstResponder()
}
以上照著做就可以了喔！！測試圖片如下
下圖為按下login後print出來登入
下圖為判斷帳號（email)格式錯誤
希望能幫助到大家喔！！
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