手势密码实现
手势密码 一般常常用于金融项目，做的是安全相关的业务。具体实现如下思路，我把它分为view层和逻辑层。我将数据层合并到view层中了，最好是加上数据层用于处理加密的密码和密码的存储
view层
view层主要处理，包括（九个按钮）touchesBegan,touchesMoved,touchesEnded，点与点之间画线，手指滑动画线，画线主要是在drawRect中重绘，提到这里必须不能忘记setNeedsDisplay这个方法。还要记录经过的按钮btnsArray（存放按钮的数组），这个 可以和相关的具体值做映射，也可以直接设置btn 的tag,还要添加完成绘画的回调。提供给逻辑层去处理。
逻辑层
用于处理完成交互后的业务，包括（请求接口，异常逻辑显示，等等）
具体的demo点这里
具体的code：
view.h
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//// 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 |
view.m
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//// 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 |
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