首先附上链接：https://github.com/wangtaoHappy/SwiftPassword
在此 demo中主要涉及到的知识点有一下几个：
1：swift中协议的写法和使用
声明协议，继承自NSObjectProtocol
protocol PasswordAlertViewDelegate:NSObjectProtocol{
func passwordCompleteInAlertView(alertView:PasswordAlertView, password:NSString)
}
设定属性
weak var delegate:PasswordAlertViewDelegate?
将想要得到的值传递出去
func sure(sender:UIButton) {
print("确定")
delegate?.passwordCompleteInAlertView(alertView:self, password: self.textFiled.text! as NSString)
}
遵守协议
class ViewController: UIViewController,PasswordAlertViewDelegate
在UIController中的调用
func inputPassword() {
let pswAlertView = PasswordAlertView.init(frame: self.view.bounds)
pswAlertView.delegate = self
self.view.addSubview(pswAlertView)
}
func passwordCompleteInAlertView(alertView: PasswordAlertView, password: NSString) {
alertView.removeFromSuperview()
print("password:",password);
self.label.text = NSString.init(format: "密码:\(password)" as NSString) as String
}
2:键盘的出现和隐藏的监听，以及view随键盘高度变化而变化
键盘监听
NotificationCenter.default.addObserver(self, selector: #selector(keyBoardWillShow(Info:)), name: NSNotification.Name.UIKeyboardWillShow, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(keyBoardWillHide(Info:)), name: NSNotification.Name.UIKeyboardWillHide, object: nil)
得到信息后，根据键盘高度设置弹窗的高度
func keyBoardWillShow(Info:NSNotification) {
let userInfos = Info.userInfo![UIKeyboardFrameEndUserInfoKey]
let heigh = ((userInfos as AnyObject).cgRectValue.size.height)
self.BGView.center = CGPoint.init(x: self.BGView.center.x , y:ScreenH - heigh - self.BGView.frame.size.height/2 - 10)
}
func keyBoardWillHide(Info:NSNotification) {
self.BGView.center = self.center
}
3:textFiled的使用方法
let textFiled = UITextField.init(frame: CGRect.init(x: 0, y: Int(line.frame.origin.y) + 30, width: Int(bgViewW), height: borderH))
textFiled.backgroundColor = UIColor.clear
//设置代理
textFiled.delegate = self
//监听编辑状态的变化
textFiled.addTarget(self, action: #selector(textFiledValueChanged(textFiled:)), for: .editingChanged)
textFiled.tintColor = UIColor.clear
textFiled.textColor = UIColor.clear
textFiled.becomeFirstResponder()
//设置键盘类型为数字键盘
textFiled.keyboardType = .numberPad
self.textFiled = textFiled;
bgView.addSubview(self.textFiled)
textFiled 代理方法的使用
func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
if string.characters.count == 0 {//判断是是否为删除键
return true
}else if (textField.text?.characters.count)! >= pointCount {
//当输入的密码大于等于6位后就忽略
return false
} else {
return true
}
}
每天努力一点点！！！
