swift版本手势解锁

这个很有意思啊

控制器部分

//
//  ViewController.swift
//  手势解锁
//
//  Created by admin on 16/1/25.
//  Copyright © 2016年 jin. All rights reserved.
//

import UIKit

class ViewController: UIViewController,Gesturedelegate {

    override func viewDidLoad() {
        super.viewDidLoad()
        // 初始化自定义类
        let gesture = Gesture(frame: CGRectMake(0, 0, UIScreen.mainScreen().bounds.size.width, 400))
        //
        gesture.backgroundColor = UIColor.clearColor()
        gesture.passwordDelegate = self
        self.view.backgroundColor = UIColor(patternImage: UIImage(imageLiteral: "Home_refresh_bg"))
        self.view.addSubview(gesture)
        // Do any additional setup after loading the view, typically from a nib.
    }
    func gestureCheckPassword(password: String) {
        if password == "0123"
        {
            let alert = UIAlertController(title: "登录成功", message: "登录成功", preferredStyle: UIAlertControllerStyle.Alert)
            alert.addAction(UIAlertAction(title: "确认", style: UIAlertActionStyle.Cancel, handler: nil))
            self.presentViewController(alert, animated: true, completion: nil)
            // 用下面这个弹窗会有警告
            //let alert = UIAlertView(title: "登录成功", message: "登录成功", delegate: nil, cancelButtonTitle: "登录成功")
        }
    }
}

自定义类，解锁类，其实更多的是画图

//
//  Gesture.swift
//  手势解锁
//
//  Created by admin on 16/1/25.
//  Copyright © 2016年 jin. All rights reserved.
//

import UIKit
@objc protocol Gesturedelegate
{
    optional func gestureCheckPassword(password:String)
}
class Gesture: UIView {
    lazy var buttons:[UIButton] = []// 存放所有按钮
    lazy var selectedButtons:[UIButton] = []// 存放以及选择的按钮
    lazy var point:CGPoint = CGPoint(x: 0, y: 0)// 存放当前的点击的位置
    weak var passwordDelegate:Gesturedelegate!// 验证密码的代理
    override init(frame: CGRect) {
        super.init(frame: frame)
        // 添加按钮
        for var i = 0;i < 9;i++
        {
            let button = UIButton()
            // 禁止交互，不禁止的话划过的时候会改变样式
            button.userInteractionEnabled = false
            // 设置tag，用来组合密码
            button.tag = i
            self.buttons.append(button)
            self.addSubview(button)
        }
    }

    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    // 设置按钮的布局
    override func layoutSubviews() {
        // 获得不同状态的图片
        let normalImage = UIImage(imageLiteral: "gesture_node_normal")
        let selectedImage = UIImage(imageLiteral: "gesture_node_highlighted")
        // 按钮的行数
        let colunm = 3
        // 根据行数计算边距
        let margin = (self.frame.size.width - (normalImage.size.width * CGFloat(colunm))) / CGFloat(colunm + 1)
        // 计算边距，利用取余和除
        for var i = 0;i < self.buttons.count;i++
        {
            let button = self.buttons[i]
            let marginLeft = CGFloat(i % colunm)
            let marginTop = CGFloat(i / colunm)
            let buttonRect = CGRectMake((marginLeft * normalImage.size.width) + (marginLeft + 1) * margin, ((marginTop + 1) * margin) + ((marginTop) * normalImage.size.height), normalImage.size.width, normalImage.size.height)
            button.frame = buttonRect
            button.setImage(normalImage, forState: UIControlState.Normal)
            button.setImage(selectedImage, forState: UIControlState.Selected)
            self.addSubview(button)
        }
    }
    // 开始点击的时候
    override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
        self.touchesMoved(touches, withEvent: event)
    }
    // 设置当前连线状态
    override func touchesMoved(touches: Set<UITouch>, withEvent event: UIEvent?) {
        // 获取当前touch对象
        let touch = (touches as NSSet).anyObject()
        // 获取当前触摸位置
        let location:CGPoint = (touch?.locationInView(touch?.view))!
        // 循环所有的按钮
        for var i = 0;i < self.buttons.count;i++
        {
            let button = self.buttons[i]
            // 当触摸在按钮上时，设置按钮的状态，并加入类属性，注意这里的函数
            if CGRectContainsPoint(button.frame, location) && button.selected == false
            {
                button.selected = true
                self.selectedButtons.append(button)
            }
        }
        // 追加当前触摸位置点
        self.point = location
        self.setNeedsDisplay()
    }
    // 结束触摸时做处理
    override func touchesEnded(touches: Set<UITouch>, withEvent event: UIEvent?) {
        // 循环取消以选中的按钮状态
        self.selectedButtons.forEach({$0.selected = false})
        // 删除已经记录的所有已选中的按钮
        self.selectedButtons.removeAll()
        self.setNeedsDisplay()
    }
    // 画当前连线状态
    override func drawRect(rect: CGRect) {
        // 设置path对象
        let lines:UIBezierPath = UIBezierPath()
        // 如果没有选中则直接返回
        if self.selectedButtons.count == 0
        {
            return
        }
        // 设置起点
        lines.moveToPoint((self.selectedButtons.first?.center)!)
        // 初始化密码字符串
        var password = ""
        // 获取当前选中的按钮的点和tag
        selectedButtons.forEach({
            button in
            lines.addLineToPoint(button.center)
            password += "\(button.tag)"
        })
        // 添加当前触摸的点
        lines.addLineToPoint(self.point)
        // 设置线的格式
        lines.lineCapStyle = CGLineCap.Round
        lines.lineJoinStyle = CGLineJoin.Round
        lines.lineWidth = 10
        let lineColor = UIColor.blueColor()
        lineColor.set()
        // 画
        lines.stroke()
        // 执行密码的代理方法
        self.passwordDelegate?.gestureCheckPassword?(password)
    }
}