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// MGTextField.swift
// MGLoginView
// Created by ming.com on 2017/5/27.
// Copyright © 2017年 i-Techsys. All rights reserved.
import UIKit
class MGTextField: UIView {
// MARK: - 私有接口属性
// 占位注释
fileprivate var placeholderLabel: UILabel!
// 线
fileprivate var lineView: UIView!
// 填充线
fileprivate var lineLayer: CALayer!
fileprivate let lineHeight: CGFloat = 1
// 移动一次
fileprivate var isMoved: Bool = false
// MARK: - 公开接口属性
// placeholder默认移动距离
var xPadding: CGFloat = 6 // x
var heightSpaceing: CGFloat = 3 // y
// 文本框(提供给外界，设置键盘灯限制)
fileprivate var textField: UITextField!
//注释普通状态下颜色
var placeholderNormalColor: UIColor! = UIColor.darkGray
//注释选中状态下颜色
var placeholderSelectColor: UIColor! = UIColor.black
// 光标颜色
var cusTintColor: UIColor! {
didSet {
textField.tintColor = cusTintColor
}
}
var placeholderSring: String! {
didSet {
placeholderLabel.text = placeholderSring
}
}
// MARK: - 系统初始化方法
override init(frame: CGRect) {
super.init(frame: frame)
textField = TextField(frame: CGRect.zero)
textField.borderStyle = .none
textField.font = UIFont.systemFont(ofSize: CGFloat(15.0))
textField.textColor = UIColor.white
textField.tintColor = UIColor.white
addSubview(textField)
placeholderLabel = UILabel(frame: CGRect.zero)
placeholderLabel.font = UIFont.systemFont(ofSize: CGFloat(13.0))
placeholderLabel.textColor = UIColor.lightGray
addSubview(placeholderLabel)
lineView = UIView(frame: CGRect.zero)
lineView.backgroundColor = UIColor.lightGray
addSubview(lineView)
lineLayer = CALayer()
lineLayer.frame = CGRect(x: CGFloat(0), y: CGFloat(0), width: CGFloat(0), height: CGFloat(lineHeight))
lineLayer.anchorPoint = CGPoint(x: CGFloat(0), y: CGFloat(0.5))
lineLayer.backgroundColor = UIColor.white.cgColor
lineView.layer.addSublayer(lineLayer)
NotificationCenter.default.addObserver(self, selector: #selector(textFieldChange(_:)), name: NSNotification.Name.UITextFieldTextDidChange, object: textField)
NotificationCenter.default.addObserver(self, selector: #selector(textFieldBeginEditing(_:)), name: NSNotification.Name.UITextFieldTextDidBeginEditing, object: textField)
NotificationCenter.default.addObserver(self, selector: #selector(textFieldEndEditing(_:)), name: NSNotification.Name.UITextFieldTextDidEndEditing, object: textField)
}
override func layoutSubviews() {
super.layoutSubviews()
textField.frame = CGRect(x: 0, y: 0, width: self.frame.width, height: self.frame.height-lineHeight )
placeholderLabel.frame = CGRect(x: 10, y: 0, width: self.frame.width, height: self.frame.height-lineHeight )
lineView.frame = CGRect(x: 0, y: self.frame.height-lineHeight, width: self.frame.width, height: lineHeight )
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
deinit {
NotificationCenter.default.removeObserver(self)
}
}
extension MGTextField {
/// 开始编辑
@objc fileprivate func textFieldBeginEditing(_ noti: Notification) {
placeholderLabel.textColor = self.placeholderSelectColor
UIView.animate(withDuration: 0.15) {
self.lineLayer.bounds = CGRect(x: 0, y: 0, width: self.frame.width, height: self.lineHeight)
}
}
/// 结束编辑
@objc fileprivate func textFieldEndEditing(_ noti: Notification) {
placeholderLabel.textColor = self.placeholderNormalColor
UIView.animate(withDuration: 0.15) {
self.lineLayer.bounds = CGRect(x: 0, y: 0, width: 0, height: self.lineHeight)
}
}
/// 文本框改变的时候调用
///
/// - Parameter noti:
@objc fileprivate func textFieldChange(_ noti: Notification) {
changeFrameOfPlaceholder()
}
/// 改变占位文字的位置
fileprivate func changeFrameOfPlaceholder() {
let y = placeholderLabel.center.y;
let x = placeholderLabel.center.x;
if(textField.text?.characters.count != 0 && !isMoved){
self.placeholderLabelMoveAnimation(x: x, y: y)
}else if(textField.text?.characters.count == 0 && isMoved){
self.placeholderLabelMoveBackAnimation(x: x, y: y)
}
}
/// 文本框有文字时占位字符移动
///
/// - Parameters:
/// - x: 占位Label的中心点x
/// - y: 占位Label的中心点y
fileprivate func placeholderLabelMoveAnimation(x: CGFloat, y: CGFloat) {
var moveX = x
var moveY = y
placeholderLabel.font = UIFont.systemFont(ofSize: 12)
placeholderLabel.textColor = placeholderSelectColor
UIView.animate(withDuration: 0.15, animations: {() -> Void in
moveY -= self.placeholderLabel.frame.size.height / 2 + self.heightSpaceing
moveX -= self.xPadding
self.placeholderLabel.center = CGPoint(x: moveX, y: moveY)
self.placeholderLabel.alpha = 1
self.isMoved = true
})
}
/// 文本框被清空时占位字符回到原始位置
///
/// - Parameters:
/// - x: 占位Label的中心点x
/// - y: 占位Label的中心点y
fileprivate func placeholderLabelMoveBackAnimation(x: CGFloat, y: CGFloat) {
var moveX = x
var moveY = y
placeholderLabel.font = UIFont.systemFont(ofSize: 15)
placeholderLabel.textColor = placeholderNormalColor
UIView.animate(withDuration: 0.15, animations: {() -> Void in
moveY += self.placeholderLabel.frame.size.height / 2 + self.heightSpaceing
moveX += self.xPadding
self.placeholderLabel.center = CGPoint(x: moveX, y: moveY)
self.placeholderLabel.alpha = 1
self.isMoved = false
})
}
}
// MARK: - 主要是设置光标位置
class TextField: UITextField {
override func textRect(forBounds bounds: CGRect) -> CGRect {
let inset = CGRect(x: bounds.origin.x + 10, y: bounds.origin.y, width: bounds.size.width - 25, height: bounds.size.height)
//更好理解些
return inset
}
// 重写来编辑区域，可以改变光标起始位置，以及光标最右到什么地方，placeHolder的位置也会改变
override func editingRect(forBounds bounds: CGRect) -> CGRect {
return CGRect(x: bounds.origin.x + 10, y: bounds.origin.y, width: bounds.size.width - 25, height: bounds.size.height)
}
}
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