iOS 九宫格解锁

思路:

1.画9个按钮,通过按钮的选中状态控制按钮.

2.连线通过贝塞尔曲线绘制.

3.校验密码通过给按钮绑定tag值判断.

主要代码:

OC版本:

 //
 //  NineLockView.m
 //  lockView
 //
 //  Created by Shaoting Zhou on 2018/1/24.
 //  Copyright © 2018年 Shaoting Zhou. All rights reserved.
 //

 #import "NineLockView.h"

 CGFloat const btnCount = ; //九宫格个数
 CGFloat const btnW = ;    //单个按钮宽
 CGFloat const btnH = ;    //单个按钮高
 CGFloat const viewY = ;  //视图Y
 int const columnCount = ;   //列数
 #define kScreenWidth [UIScreen mainScreen].bounds.size.width

 @interface NineLockView ()
 @property (nonatomic, strong) NSMutableArray * selectBtnsAry; //选中按钮的数组
 @property (nonatomic, assign) CGPoint currentPoint;    //当前的点 坐标 用于判断最后一个点
 @end

 @implementation NineLockView

 -(NSMutableArray *)selectBtnsAry{
     if(!_selectBtnsAry){
         _selectBtnsAry = [NSMutableArray array];
     }
     return _selectBtnsAry;
 }

 //通过代码布局时会调用这个方法
 -(instancetype)initWithFrame:(CGRect)frame{
     if(self = [super initWithFrame:frame]){
         self.backgroundColor = [UIColor clearColor];
         [self addButton];
     }
     return self;
 }

 //通过sb xib布局时会调用这个方法
 -(instancetype)initWithCoder:(NSCoder *)aDecoder{
     if(self = [super initWithCoder:aDecoder]){
         [self addButton];
     }
     return self;
 }

 #pragma Mark - 布局按钮
 - (void)addButton{
     CGFloat height = ;;
     for (int i = ; i < btnCount; i++) {
         UIButton * btn = [UIButton buttonWithType:(UIButtonTypeCustom)];
         btn.tag = i;
         btn.userInteractionEnabled = NO; //不可交互
         //设置默认的图片
         [btn setBackgroundImage:[UIImage imageNamed:@"gesture_normal"] forState:(UIControlStateNormal)];
         //设置选中的图片
         [btn setBackgroundImage:[UIImage imageNamed:@"gesture_selected"] forState:(UIControlStateSelected)];
         int row = i / columnCount;  //第几行
         int column = i % columnCount;   //第几列
         CGFloat margin = (self.frame.size.width - columnCount * btnW) / (columnCount + ); //边距
         CGFloat btnX = margin + column * (btnW + margin);   //x轴
         CGFloat btnY = row * (btnW + margin);       //y轴
 //        btn.backgroundColor =[UIColor redColor];
         btn.frame = CGRectMake(btnX, btnY, btnW, btnH);
         height = btnH + btnY;   //视图高等于 最后一个点的高+y
         [self addSubview:btn];
     }
     self.frame = CGRectMake(, viewY, kScreenWidth, height);   //视图frame
 }

 - (CGPoint)pointWithTouch:(NSSet *)touches{
     UITouch * touch = [touches anyObject];
     CGPoint point = [touch locationInView:self];
     return point;
 }
 - (UIButton *)buttonWithPoint:(CGPoint)point{
     for (UIButton * btn in self.subviews) {
         if(CGRectContainsPoint(btn.frame, point)){
             return btn;
         }
     }
     return nil;
 }

 #pragma Mark - 开始移动
 - (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{
     //1.拿到触摸的点
     CGPoint point = [self pointWithTouch:touches];
     //2.根据触摸的点拿到相应的按钮
     UIButton * btn = [self buttonWithPoint:point];
     //3.设置状态
     if(btn && btn.selected == NO){
         btn.selected = YES;
         [self.selectBtnsAry addObject:btn];
     }

 }

 #pragma Mark  - 移动中
 - (void)touchesMoved:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{
     //1.拿到触摸的点
     CGPoint point = [self pointWithTouch:touches];
     //2.根据触摸的点拿到相应的按钮
     UIButton * btn = [self buttonWithPoint:point];
     //3.设置状态
     if(btn && btn.selected == NO){
         btn.selected = YES;
         [self.selectBtnsAry addObject:btn];
     }else{
         self.currentPoint = point;
     }
     [self setNeedsDisplay];
 }

 #pragma Mark - 结束移动
 - (void)touchesEnded:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{
     if([self.delegete respondsToSelector:@selector(lockView:didFinishPath:)]){
         NSMutableString * path = [NSMutableString string];
         for (UIButton * btn in self.selectBtnsAry) {
             [path appendFormat:@"%ld",(long)btn.tag];
         }
         [self.delegete lockView:self didFinishPath:path];
     }
     //清空状态
     for(int i = ; i < self.selectBtnsAry.count; i++ ){
         UIButton * button = self.selectBtnsAry[i];
         button.selected = NO;
     }
     [self.selectBtnsAry removeAllObjects];
     [self setNeedsDisplay];
 }

 #pragma  Mark - 取消移动
 - (void)touchesCancelled:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{
     [self touchesEnded:touches withEvent:event];
 }

 #pragma Mark - 绘图
 - (void)drawRect:(CGRect)rect{
     if(self.selectBtnsAry.count  == ){
         return;
     }
     UIBezierPath * path = [UIBezierPath bezierPath];
     path.lineWidth = ;
     path.lineJoinStyle = kCGLineJoinRound;
     [[UIColor colorWithRed:/255.0 green:/255.0 blue:/255.0 alpha:0.5] set];
     //遍历按钮
     for(int i = ; i < self.selectBtnsAry.count; i++ ){
         UIButton * button = self.selectBtnsAry[i];
         NSLog(@"%d",i);
         if(i == ){
             //设置起点
             [path moveToPoint:button.center];
         }else{
             //连线
             [path addLineToPoint:button.center];
         }

     }
     [path addLineToPoint:self.currentPoint]; //最后一点 连接自己
     [path stroke];

 }

 @end

OC版本

 //
 //  ViewController.m
 //  lockView
 //
 //  Created by Shaoting Zhou on 2018/1/24.
 //  Copyright © 2018年 Shaoting Zhou. All rights reserved.
 //

 #import "ViewController.h"
 #import "NineLockView.h"

 #define kScreenWidth [UIScreen mainScreen].bounds.size.width
 #define kScreenHeight [UIScreen mainScreen].bounds.size.height

 @interface ViewController () <NineLockViewDelegate>

 @end

 @implementation ViewController

 - (void)viewDidLoad {
     [super viewDidLoad];
     self.view.backgroundColor = [UIColor brownColor];
     NineLockView * lockView = [[NineLockView alloc]initWithFrame:CGRectMake(, , kScreenWidth, kScreenHeight)];
     lockView.delegete = self;
     [self.view addSubview:lockView];
 }

 -(void)lockView:(NineLockView *)lockView didFinishPath:(NSString *)path{
     if(path.length <= ){
         NSLog(@"请至少连4个点");
         return;
     }
     if([path isEqualToString:@""]){
         NSLog(@"OK");
     }else{
         NSLog(@"error");
     }
 }

 - (void)didReceiveMemoryWarning {
     [super didReceiveMemoryWarning];
     // Dispose of any resources that can be recreated.
 }

 @end

OC版本

swift版本:

 //
 //  ViewController.swift
 //  lockView-Swift
 //
 //  Created by Shaoting Zhou on 2018/1/25.
 //  Copyright © 2018年 Shaoting Zhou. All rights reserved.
 //

 import UIKit

 class ViewController: UIViewController,nineLockViewDelegate  {

     let kScreenHeight = UIScreen.main.bounds.size.height
     let kScreenWidth = UIScreen.main.bounds.size.width
     override func viewDidLoad() {
         super.viewDidLoad()
         self.view.backgroundColor = UIColor.brown
         let nineLockView = NineLockView.init(frame: CGRect.init(x: 0, y: 0, width: kScreenWidth, height: kScreenHeight))
         nineLockView.delegate = self
         self.view.addSubview(nineLockView)

         // Do any additional setup after loading the view, typically from a nib.
     }
     //MARK: - 代理方法
     func lockView(lockView: NineLockView, path: String) {
         if(path.description.count < 4){
             print("至少连4个");
             return;
         }
         if(path == "01258"){
             print("密码正确");
         }else{
             print("密码错误");
         }
     }

     override func didReceiveMemoryWarning() {
         super.didReceiveMemoryWarning()
         // Dispose of any resources that can be recreated.
     }

 }

Swift版本

 //
 //  NineLockView.swift
 //  lockView-Swift
 //
 //  Created by Shaoting Zhou on 2018/1/25.
 //  Copyright © 2018年 Shaoting Zhou. All rights reserved.
 //

 import UIKit

 let btnCount = 9; //九宫格个数
 let btnW:CGFloat = 74.0;    //单个按钮宽
 let btnH:CGFloat = 74.0;    //单个按钮高
 let viewY:CGFloat = 300.0;  //视图Y
 let columnCount = 3;   //列数
 let kScreenHeight = UIScreen.main.bounds.size.height
 let kScreenWidth = UIScreen.main.bounds.size.width

 //创建协议
 protocol nineLockViewDelegate:NSObjectProtocol
 {
     func lockView(lockView:NineLockView,path:String)
 }

 class NineLockView: UIView {
     weak var delegate:nineLockViewDelegate?
     var selectBtnsAry = [UIButton] ()
     var currentPoint:CGPoint!

     override init(frame: CGRect) {
         super.init(frame: frame)
         self.backgroundColor = UIColor.clear
         self .addButton();
     }

     // MARK: 添加按钮
     func addButton(){
         var height:CGFloat = 0.0
         for var i in 0 ..< btnCount{
             let btn = UIButton.init(type: .custom)
             btn.setImage(#imageLiteral(resourceName: "gesture_normal"), for: .normal)  //默认图片
             btn.setImage(#imageLiteral(resourceName: "gesture_selected"), for: .selected)  //选中图片
             btn.tag = i
             btn.isUserInteractionEnabled = false  //取消用户交互
             let row = i / columnCount  //行数
             let column = i % columnCount //列数
             let margin:CGFloat = (self.frame.size.width - CGFloat(columnCount) * btnW) / CGFloat( (columnCount + 1)); //边距
             let btnX:CGFloat = margin + CGFloat(column) * (btnW + margin);   //x轴
             let btnY:CGFloat = CGFloat(row) * (btnW + margin);       //y轴
             btn.frame = CGRect.init(x: btnX, y: btnY, width: btnW, height: btnH)
             height = btnY + btnH   //视图的高 = 最后一个按钮的高 + y
             self.addSubview(btn)
         }
         self.frame = CGRect.init(x: 0, y: viewY, width: kScreenWidth, height: height)
     }

     func pointWithTouch(touches:Set<UITouch>) -> CGPoint{
         let touch:UITouch = (touches as NSSet).anyObject() as! UITouch
         let point = touch.location(in: self)
         return point;
     }
     func buttonWithPoint(point:CGPoint) -> UIButton?{
         for var view:UIView in self.subviews {
             let btn:UIButton =  view as! UIButton
             if(btn.frame.contains(point)){
                 return btn
             }
         }
         return nil
     }

     // MARK:  开始移动
     override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
         //1.拿到触摸的点
         let point:CGPoint = self.pointWithTouch(touches: touches)
         //2.根据触摸的点拿到相应的按钮
         guard let btn:UIButton = self.buttonWithPoint(point: point) else{
             return;
         }
         //3.设置状态
         if(btn.isSelected == false){
             btn.isSelected  = true
             self.selectBtnsAry.append(btn)
         }

     }

     // MARK:  移动中
     override func touchesMoved(_ touches: Set<UITouch>, with event: UIEvent?) {
         //1.拿到触摸的点
         let point:CGPoint = self.pointWithTouch(touches: touches)
         //2.根据触摸的点拿到相应的按钮
         guard let btn:UIButton = self.buttonWithPoint(point: point) else{
             return;
         }
         //3.设置状态
         if(btn.isSelected == false){
             btn.isSelected  = true
             self.selectBtnsAry.append(btn)
         }else{
             self.currentPoint = point;
         }
         self.setNeedsDisplay()

     }
     // MARK:  移动停止
     override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {
         if delegate != nil{
             var str = "";
             for var i in 0 ..< self.selectBtnsAry.count{
                 let btn:UIButton = self.selectBtnsAry[i]
                 str = str  + String(btn.tag)
             }
             self.delegate?.lockView(lockView: self, path: str)
         }

         for var i in 0 ..< self.selectBtnsAry.count{
             let btn:UIButton = self.selectBtnsAry[i]
             btn.isSelected = false
         }
         self.selectBtnsAry.removeAll()
         self.setNeedsDisplay()
     }

     // MARK:  移动取消
     override func touchesCancelled(_ touches: Set<UITouch>, with event: UIEvent?) {
         self.touchesEnded(touches, with: event)
     }

     // MARK:  绘图
     override func draw(_ rect: CGRect) {
         if(self.selectBtnsAry.count == 0){
             return;
         }
         let  path:UIBezierPath = UIBezierPath.init()
         path.lineWidth = 8
         path.lineJoinStyle = .round
         UIColor.init(red: 32/255.0, green: 210/255.0, blue: 254/255.0, alpha: 0.5).set()
         //遍历按钮
         for var i in 0 ..< self.selectBtnsAry.count{
             let btn:UIButton = self.selectBtnsAry[i]
             if(i == 0){
                 //起点
                 path.move(to: btn.center)
             }else{
                 //划线
                 path.addLine(to: btn.center)
             }
         }
         path.addLine(to: self.currentPoint) //最后一点 连接自己
         path.stroke()
     }

     required init?(coder aDecoder: NSCoder) {
         fatalError("init(coder:) has not been implemented")
     }

 }

Swift版本

基本演示:

这里的只演示下基本九宫格校验密码(密码已经存在:01258).

创建密码,修改密码思路类似.

github: https://github.com/pheromone/iOS-nineLock