闲来无事学习swift3.0，顺手写了个手势密码的demo来巩固一下. 代码中自定义了两个类，一个是NumberButton用来控制Button的，一个是GesturePasswordView，是用来显示密码面板的。绘图部分就是在GesturePasswordView上进行的。下面直接上代码，代码中有相关的注释，代码也比较简单。
1、NumberButton的定义
class NumberButton: UIButton {
override init(frame: CGRect) {
super.init(frame: frame)
self .setup()
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
func setup(){
self.layer.borderColor = UIColor.green.cgColor
self.layer.borderWidth = 5
self.layer.cornerRadius = self.width * 0.5
self.layer.masksToBounds = true
self.isUserInteractionEnabled = false
}
}
2、GesturePasswordView� 定义
class GesturePasswordView: UIView {
//路径
var path:UIBezierPath = UIBezierPath()
//父控制器
weak var controller:UIViewController?
//存储已经路过的点
var pointsArr = [CGPoint]()
//当前手指所在点
var fingurePoint:CGPoint!
//密码存储
var passwordArr : [Int] = [Int]()
//提供给其他类获取密码字符串
var password:String{
get{
var str = ""
for p in passwordArr{
str.append(String(p))
}
return str
}
}
override init(frame: CGRect) {
super.init(frame: frame)
self .setup()
}
convenience init(frame: CGRect, controller:UIViewController) {
self.init(frame: frame)
self.controller = controller
self.setup()
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
//MARK: -初始化
func setup(){
// TODO: 创建视图
self.backgroundColor = .cyan
let colNum = 3
var col = 0,row = 0
let width:CGFloat = 60.0
let height:CGFloat = width
var x:CGFloat = 0
var y:CGFloat = 0
/// 计算空隙
let space = (self.width - CGFloat(colNum) * width) / 4
for index in 0..<9{
//计算当前所在行
col = index % colNum
row = index / colNum
//计算坐标
x = CGFloat(col) * width + CGFloat(col + 1) * space
y = CGFloat(row) * width + CGFloat(row + 1) * space
let button = NumberButton(frame: CGRect(x: x, y: y, width: width, height: height))
button.tag = index
self.addSubview(button)
}
//MARK: 初始化路径
self.path.lineWidth = 10
self.path.lineCapStyle = .round
self.path.lineJoinStyle = .round
UIColor.black.setStroke()
}
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
//每次点击移除所有存储过的点，重新统计
self.pointsArr.removeAll()
self.touchChanged(touch: touches.first!)
}
override func touchesMoved(_ touches: Set<UITouch>, with event: UIEvent?) {
self.touchChanged(touch: touches.first!)
}
//MARK: 触摸变化时的方法
func touchChanged(touch:UITouch){
let point = touch.location(in: self)
self.fingurePoint = point
for button in self.subviews{
if button.isKind(of: NumberButton.self) && !self.pointsArr.contains(button.center) && button.frame.contains(point){
//记录已经走过的点
self.passwordArr.append(button.tag)
//记录密码
self.pointsArr.append(button.center)
//设置按钮的背景色为红色
button.backgroundColor = UIColor.red
}
}
//会调用draw 方法
self.setNeedsDisplay()
}
override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {
let alertVC = UIAlertController(title: "您的密码是:", message: "\(passwordArr)", preferredStyle: .alert)
let action = UIAlertAction(title: "取消", style: UIAlertActionStyle.cancel, handler: {
_ in
//移除存储的密码
self.passwordArr.removeAll()
UIView.animate(withDuration: 0.25, delay: 1, options: UIViewAnimationOptions.curveEaseInOut, animations:
{
//移除所有的记录
self.pointsArr.removeAll()
self.path.removeAllPoints()
self.setNeedsDisplay()
self.fingurePoint = CGPoint.zero
//清除所有按钮的选中状态
for button in self.subviews{
if button.isKind(of: NumberButton.self) {
button.backgroundColor = UIColor.clear
}
}
}, completion: nil)
})
//弹出提示框
alertVC.addAction(action)
self.controller?.present(alertVC, animated: true, completion: nil)
}
//MARK: 绘制
override func draw(_ rect: CGRect) {
self.path.removeAllPoints()
for (index,point) in self.pointsArr.enumerated(){
if index == 0{
self.path.move(to: point)
}else{
self.path.addLine(to: point)
}
}
//让画线跟随手指
if self.fingurePoint != CGPoint.zero && self.pointsArr.count > 0{
self.path.addLine(to: self.fingurePoint)
}
self.path.stroke()
}
}
其中我提供了一个队UIView的frame下size，origin，x，y，width，height属性的快捷访问方法，实现如下:
3、UIView下size，origin，x，y，width，height属性的快捷访问方法
extension UIView{
var size:CGSize {
get{
return self.frame.size
}
set{
self.frame.size = newValue
}
}
var origin: CGPoint {
get{
return self.frame.origin
}
set{
self.frame.origin = newValue
}
}
var width:CGFloat{
get{
return self.size.width
}
set{
self.size.width = newValue
}
}
var height:CGFloat{
get{
return self.size.height
}
set{
self.size.height = newValue
}
}
var x:CGFloat{
get{
return self.origin.x
}
set{
self.origin.x = newValue
}
}
var y:CGFloat{
get{
return self.origin.y
}
set{
self.origin.y = newValue
}
}
}
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