实时判断手机号码是否正确

Posted on Edited on

综合实现对比了一下委托和通知，Target-Action是更直接的方式。
check phone number

1. 委托

UITextFieldDelegate，只能判断开始编辑那一刻的状态。
optional public func textFieldDidBeginEditing(textField: UITextField)

// became first responder

或者试试这个，下面这个委托实现起来有些啰嗦：正常输入需要加一个字符判断，但是用户按下删除键时 string为””,需要减一个字符来判断。

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//MARK: - phoneNumberTextField delegate
func textField(textField: UITextField, shouldChangeCharactersInRange range: NSRange, replacementString string: String) -> Bool {
    //TODO: - 检测电话号码注册与非
    if  textField.text != nil && string != ""{
        let newString = textField.text! + string
        if isPhoneNumberAvailable(newString) {
            sendVerificationCodeButton.enabled = true
        } else {
            sendVerificationCodeButton.enabled = false
            sendVerificationCodeButton.setTitleColor(UIColor ( red: 0.4, green: 0.4, blue: 0.4, alpha: 1.0 ), forState: UIControlState.Disabled)
            
        }
    } else if textField.text != nil && string == "" {
        let newString = String(textField.text!.characters.dropLast())
        if isPhoneNumberAvailable(newString) {
            sendVerificationCodeButton.enabled = true    
        } else {
            sendVerificationCodeButton.enabled = false       
        }
    }
    return true

}

但是如此还不行，如果光标移到不在尾部，上面的代码逻辑就不对。还要利用好range。但是这里还是将textField.text!转化为NSString，因为public mutating func replaceRange(subRange: Range<Index>, with newElements: String)这里的 Range<Index>没有搞明白，所以就是去了Unicode 的支持。这里是电话号码也就不影响使用。

参考：http://stackoverflow.com/questions/25138339/nsrange-to-rangestring-index

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//MARK: - phoneNumberTextField delegate
func textField(textField: UITextField, shouldChangeCharactersInRange range: NSRange, replacementString string: String) -> Bool {
    //TODO: - 检测电话号码注册与非
    if  textField.text != nil {

        let newString = (textField.text! as NSString).stringByReplacingCharactersInRange(range, withString: string)
        if isPhoneNumberAvailable(newString) {
            sendVerificationCodeButton.enabled = true
        } else {
            sendVerificationCodeButton.enabled = false
            self.sendVerificationCodeButton.setTitle("发送验证码", forState: UIControlState.Disabled)   
        }
    }
    return true
}

2. 注册通知

最为方便，因为我们并不关心 UITextFieldDelegate中新字符string的值

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public let UITextFieldTextDidChangeNotification: String
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override func viewDidLoad() {
    NSNotificationCenter.defaultCenter().addObserver(self, selector: "phoneNumberDidChange:", name: UITextFieldTextDidChangeNotification, object: nil)
}

override func viewWillDisappear(animated: Bool) {
    NSNotificationCenter.defaultCenter().removeObserver(self)
}

  
//MARK: - 检测电话号码是否正确更改发送验证码状态
func phoneNumberDidChange(aNotification: NSNotification) {
    if phoneNumberTextField.isFirstResponder() {
        if isPhoneNumberAvailable() {
            sendVerificationCodeButton.enabled = true
            sendVerificationCodeButton.backgroundColor = Color.colorWithHex("#15C76D")
        } else {
            sendVerificationCodeButton.enabled = false
            self.sendVerificationCodeButton.backgroundColor = UIColor.lightGrayColor()
            self.sendVerificationCodeButton.titleLabel?.text = "发送验证码"
        }
    }
}

3. UIControl 的 Target-Action

由于public class UITextField : UIControl, UITextInput, NSCoding之前没有注意，这里有个最简单直接方法：

- addTarget:action:forControlEvents:或者 IB 添加 Action
EditingChanged: UIControlEvents 

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//MARK: - 检测电话号码是否正确更改发送验证码状态
@IBAction func phoneNumberDidChange(sender: UITextField) {
    if isPhoneNumberAvailable() {
        sendVerificationCodeButton.enabled = true
        sendVerificationCodeButton.backgroundColor = Color.colorWithHex("#15C76D")
    } else {
        sendVerificationCodeButton.enabled = false
        self.sendVerificationCodeButton.backgroundColor = UIColor.lightGrayColor()
        self.sendVerificationCodeButton.titleLabel?.text = "发送验证码"
    }
}

附UIControlEvents：

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struct UIControlEvents : OptionSetType {
    init(rawValue rawValue: UInt)
    static var TouchDown: UIControlEvents { get }
    static var TouchDownRepeat: UIControlEvents { get }
    static var TouchDragInside: UIControlEvents { get }
    static var TouchDragOutside: UIControlEvents { get }
    static var TouchDragEnter: UIControlEvents { get }
    static var TouchDragExit: UIControlEvents { get }
    static var TouchUpInside: UIControlEvents { get }
    static var TouchUpOutside: UIControlEvents { get }
    static var TouchCancel: UIControlEvents { get }
    static var ValueChanged: UIControlEvents { get }
    static var PrimaryActionTriggered: UIControlEvents { get }
    static var EditingDidBegin: UIControlEvents { get }
    static var EditingChanged: UIControlEvents { get }
    static var EditingDidEnd: UIControlEvents { get }
    static var EditingDidEndOnExit: UIControlEvents { get }
    static var AllTouchEvents: UIControlEvents { get }
    static var AllEditingEvents: UIControlEvents { get }
    static var ApplicationReserved: UIControlEvents { get }
    static var SystemReserved: UIControlEvents { get }
    static var AllEvents: UIControlEvents { get }
}

4. 计时器实现延迟发送验证码

延迟60秒后，可重发发送验证码。使用NSTimer来实现，有个小小的 bug，就是第一次按下发送键，界面卡顿，从59秒起算，以后是60秒起算。以下是完整的代码。

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import UIKit

class SignupViewController: BaseViewController {
    
    var count = 60
    var myTimer: NSTimer?
    
    @IBOutlet weak var userNameTextField: UITextField!
    @IBOutlet weak var phoneNumberTextField: UITextField!
    @IBOutlet weak var VerificationCodeTextField: UITextField!
    @IBOutlet weak var password0TextField: UITextField!
    @IBOutlet weak var password1TextField: UITextField!
    
    @IBOutlet weak var signupButton: UIButton!
    @IBOutlet weak var sendVerificationCodeButton: UIButton!

    @IBAction func signupButtonClick(sender: AnyObject) {
        
    }
    
    @IBAction func sendVerificationCodeButtonClick(sender: AnyObject) {
        //TODO: - 添加发送验证码模块
        sendVerificationCodeButton.enabled = false
        
        myTimer = NSTimer.scheduledTimerWithTimeInterval(1.0, target: self, selector: "countDownTick", userInfo: nil, repeats: true)
        count = 60
        
    }
    
    override func viewDidLoad() {
        super.viewDidLoad()

        self.navigationItem.title = "注册"
        self.setupBackButton()
        
        self.automaticallyAdjustsScrollViewInsets = false
        
        signupButton.layer.cornerRadius = 35.0 / 2
        signupButton.backgroundColor = Color.colorWithHex("#15C76D")
        

        NSNotificationCenter.defaultCenter().addObserver(self, selector: "phoneNumberDidChange:", name: UITextFieldTextDidChangeNotification, object: nil)
        
        sendVerificationCodeButton.enabled = false
        sendVerificationCodeButton.setTitleColor(UIColor ( red: 0.4, green: 0.4, blue: 0.4, alpha: 1.0 ), forState: UIControlState.Disabled)
    }

    override func viewWillDisappear(animated: Bool) {
        NSNotificationCenter.defaultCenter().removeObserver(self)
    }
    
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
    }
    
    //MARK: - 检测电话号码格式是非正确
    func isPhoneNumberAvailable() -> Bool {
        let phoneNumber = phoneNumberTextField.text
        let mobile = "^1(3[0-9]|5[0-35-9]|8[025-9])\\d{8}$"
        let  CM = "^1(34[0-8]|(3[5-9]|5[017-9]|8[278])\\d)\\d{7}$"
        let  CU = "^1(3[0-2]|5[256]|8[56])\\d{8}$"
        let  CT = "^1((33|53|8[09])[0-9]|349)\\d{7}$"
        let regextestmobile = NSPredicate(format: "SELF MATCHES %@",mobile)
        let regextestcm = NSPredicate(format: "SELF MATCHES %@",CM )
        let regextestcu = NSPredicate(format: "SELF MATCHES %@" ,CU)
        let regextestct = NSPredicate(format: "SELF MATCHES %@" ,CT)
        if ((regextestmobile.evaluateWithObject(phoneNumber) == true)
            || (regextestcm.evaluateWithObject(phoneNumber)  == true)
            || (regextestct.evaluateWithObject(phoneNumber) == true)
            || (regextestcu.evaluateWithObject(phoneNumber) == true))
        {
            return true
        }
        else
        {
            return false
        }
    }



    //MARK: - 检测电话号码是否正确更改发送验证码状态
    func phoneNumberDidChange(aNotification: NSNotification) {
        if phoneNumberTextField.isFirstResponder() {
            if isPhoneNumberAvailable() {
                sendVerificationCodeButton.enabled = true
                sendVerificationCodeButton.backgroundColor = Color.colorWithHex("#15C76D")
            } else {
                sendVerificationCodeButton.enabled = false
                self.sendVerificationCodeButton.backgroundColor = UIColor.lightGrayColor()
                self.sendVerificationCodeButton.titleLabel?.text = "发送验证码"
            }
        }
    }
    
    //MARK: -
    func countDownTick() {
       
        if count == 1 {
            myTimer?.invalidate()
            self.sendVerificationCodeButton.enabled = true
            self.sendVerificationCodeButton.setTitle("发送验证码", forState: UIControlState.Normal)
            count = 61
        }

        count--
        self.sendVerificationCodeButton.setTitle("\(count)秒后重发", forState: UIControlState.Disabled)
    }

}