iOS实现手势密码功能

//// YHGesturePasswordView.h// 手势密码//// Created by mrlee on 2017/3/5.// Copyright © 2017年 mrlee. All rights reserved.//typedef enum {  GestureSetPassword, //设置手势密码  GestureResultPassword //已有手势密码教验} PasswordState;//设置密码的3种状态typedef enum {  FristPwd, //第一次设置密码  PwdNoValue, //二次设置密码不一致  SetPwdSuccess, //设置密码成功  Other}SetPwdState;#import <UIKit/UIKit.h>@interface YHGesturePasswordView : UIView/** btn图片*/@property (nonatomic,strong)UIImage *btnImage;///选中的图片@property (nonatomic,strong)UIImage *btnSelectImage;///划线颜色@property (nonatomic,strong)UIColor *lineColor;/** 解锁手势完成之后判断结果时调用的block */@property (nonatomic,copy)BOOL (^sendReaultData)(NSString *str);//设置手势密码@property(nonatomic,copy)void(^setPwdBlock)(SetPwdState pwdState);// init-(instancetype)initWithFrame:(CGRect)frame WithState:(PasswordState)state;@end

//// YHGesturePasswordView.m// 手势密码//// Created by mrlee on 2017/3/5.// Copyright © 2017年 mrlee. All rights reserved.//#define SCREEN_WIDTH [UIScreen mainScreen].bounds.size.width#define SCREEN_HEIGHT [UIScreen mainScreen].bounds.size.height#import "YHCustomButton.h"#import "YHGesturePasswordView.h"#import <CommonCrypto/CommonDigest.h>@interface YHGesturePasswordView(){  /** 判断是当设置密码用，还是解锁密码用*/  PasswordState Amode;}/** 所有的按钮集合*/@property (nonatomic,strong)NSMutableArray * allBtnsArray;/** 解锁时手指经过的所有的btn集合*/@property (nonatomic,strong)NSMutableArray * btnsArray;/** 手指当前的触摸位置*/@property (nonatomic,assign)CGPoint currentPoint;@end@implementation YHGesturePasswordView-(instancetype)initWithFrame:(CGRect)frame WithState:(PasswordState)state{  self = [super initWithFrame:frame];  if (self) {     self.backgroundColor = [UIColor clearColor];    Amode = state;    for (int i = 0; i<9; i++) {      YHCustomButton *btn = [[YHCustomButton alloc]init];      [btn setTag:i];      btn.userInteractionEnabled = NO;      if (self.lineColor == nil) {        self.lineColor = [UIColor greenColor];      }      [self addSubview:btn];    }  }  return self;}-(void)drawRect:(CGRect)rect{  // 每次调用这个方法的时候如果背景颜色是default会产生缓存，如果设置了颜色之后就没有缓存，绘制之前需要清除缓存  CGContextRef ctx = UIGraphicsGetCurrentContext();  CGContextClearRect(ctx, rect);//清空上下文  for (int i = 0; i<self.btnsArray.count; i++) {    UIButton *btn = self.btnsArray[i];    if (i == 0) {      CGContextMoveToPoint(ctx, btn.center.x, btn.center.y);    }else{      CGContextAddLineToPoint(ctx, btn.center.x, btn.center.y);    }  }  if (!CGPointEqualToPoint(self.currentPoint, CGPointZero)) {//如果起点不是CGPointZero的话才来划线    CGContextAddLineToPoint(ctx, self.currentPoint.x, self.currentPoint.y);  }  CGContextSetLineWidth(ctx, 12);  CGContextSetLineCap(ctx, kCGLineCapRound);  CGContextSetLineJoin(ctx, kCGLineJoinRound);  [self.lineColor set];  CGContextStrokePath(ctx);}-(void)layoutSubviews{   [self.allBtnsArray removeAllObjects];  for (int index =0; index<self.subviews.count; index ++) {    if ([self.subviews[index] isKindOfClass:[YHCustomButton class]]) {      [self.allBtnsArray addObject:self.subviews[index]];    }  }  // button 绘制九宫格  [self drawUi];}#pragma mark Private method-(void)drawUi{  for (int index = 0; index<self.allBtnsArray.count; index ++) {    //拿到每个btn    UIButton *btn = self.subviews[index];    //设置frame    CGFloat btnW = 74;    CGFloat btnH = 74;    CGFloat margin = (SCREEN_WIDTH - (btnW *3))/4;    //x = 间距 + 列号*（间距+btnW）    CGFloat btnX = margin + (index % 3)*(margin + btnW);    CGFloat btnY = margin + (index / 3)*(margin + btnH);    btn.frame = CGRectMake(btnX, btnY, btnW, btnH);  }}//设置密码-(SetPwdState)pwdValue:(NSString *)str{  if ([[NSUserDefaults standardUserDefaults] objectForKey:@"pwdValue"] == nil) {    //第一次设置    [[NSUserDefaults standardUserDefaults] setValue:str forKey:@"pwdValue"];    return FristPwd;  }  if ([str isEqualToString: [[NSUserDefaults standardUserDefaults]objectForKey:@"pwdValue"]]) {    //设置成功    return SetPwdSuccess;  }  if (![str isEqualToString: [[NSUserDefaults standardUserDefaults]objectForKey:@"pwdValue"]]) {    //二次设置不一样    return PwdNoValue;  }  return Other;}//清空-(void)clear{  [self.btnsArray removeAllObjects];  self.currentPoint = CGPointZero;  [self setNeedsDisplay];  self.lineColor = [UIColor greenColor];  self.userInteractionEnabled = YES;}//获取触摸的点-(CGPoint)getCurrentTouch:(NSSet<UITouch*> *)touches{  UITouch *touch = [touches anyObject];  CGPoint point = [touch locationInView:touch.view];  return point;}-(UIButton *)getCurrentBtnWithPoint:(CGPoint) currentPoint{  for (UIButton *btn in self.subviews) {    if (CGRectContainsPoint(btn.frame, currentPoint)) {      return btn;    }  }  return nil;}-(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{  CGPoint point = [self getCurrentTouch:touches];  UIButton *btn = [self getCurrentBtnWithPoint:point];  if (btn && btn.selected != YES) {    btn.selected = YES;    [self.btnsArray addObject:btn];    NSLog(@" array is value %@",self.btnsArray);  }}-(void)touchesMoved:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{  CGPoint movePoint = [self getCurrentTouch:touches];  UIButton *btn = [self getCurrentBtnWithPoint:movePoint];  if (btn && btn.selected !=YES) {    btn.selected = YES;    [self.btnsArray addObject:btn];    NSLog(@"btn is value %@",self.btnsArray);  }  self.currentPoint = movePoint;  [self setNeedsDisplay];}-(void)touchesEnded:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{  for (UIButton *btn in self.btnsArray) {    [btn setSelected:NO];  }  NSMutableString *result = [NSMutableString string];  for (UIButton *btn in self.btnsArray) {    [result appendString: [NSString stringWithFormat:@"%ld",(long)btn.tag]];  }  switch (Amode) {    case GestureSetPassword:{      //设置手势密码      self.setPwdBlock([self pwdValue:result]);    }      break;    case GestureResultPassword :{      //获取手势密码结果      if (self.sendReaultData) {        if (self.sendReaultData(result) == YES) {           NSLog(@"success");          [self clear];        }else{          NSLog(@"手势有误");        }      }    }      break;    default:      break;  }  //返回结果  [self clear];}#pragma mark 延时加载-(NSMutableArray *)btnsArray{  if (_btnsArray == nil) {    _btnsArray = [NSMutableArray array];  }  return _btnsArray;}-(NSMutableArray *)allBtnsArray{  if (_allBtnsArray == nil) {    _allBtnsArray = [NSMutableArray array];  }  return _allBtnsArray;}@end