iOS实现九宫格连线手势解锁

//// ClockView.m// 手势解锁//// Created by llkj on 2017/8/24.// Copyright © 2017年 LayneCheung. All rights reserved.//#import "ClockView.h"@interface ClockView ()//存放当前选中的按钮@property (nonatomic, strong) NSMutableArray *selectBtnArry;//当前手指所在点@property (nonatomic, assign) CGPoint curP;@end@implementation ClockView- (void)awakeFromNib{ [super awakeFromNib]; //初始化 [self setUp];}- (NSMutableArray *)selectBtnArry{ if (_selectBtnArry == nil) { _selectBtnArry = [NSMutableArray array]; } return _selectBtnArry;}- (void)setUp{ for (int i = 0; i < 9; i ++) { //创建按钮 UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom]; btn.tag = i; btn.userInteractionEnabled = NO; [btn setImage:[UIImage imageNamed:@"gesture_node_normal"] forState:UIControlStateNormal]; [btn setImage:[UIImage imageNamed:@"gesture_node_selected"] forState:UIControlStateSelected]; [self addSubview:btn]; }}//获取当前点- (CGPoint)getCurrentPoint:(NSSet *)point{ UITouch *touch = [point anyObject]; return [touch locationInView:self];}//返回按钮- (UIButton *)btnRectContainsPoint:(CGPoint)point{ //遍历brn判断当前点在不在btn上 for (UIButton *btn in self.subviews) { if (CGRectContainsPoint(btn.frame, point)) {  return btn; } } return nil;}- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{ //1.获取当前点 CGPoint curP = [self getCurrentPoint:touches]; //2.判断当前点在不在btn上 UIButton *btn = [self btnRectContainsPoint:curP]; if (btn && btn.selected == NO) { btn.selected = YES; //保存选中的按钮 [self.selectBtnArry addObject:btn]; }}- (void)touchesMoved:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{ //1.获取当前点 CGPoint curP = [self getCurrentPoint:touches]; self.curP = curP; //2.判断当前点在不在btn上 UIButton *btn = [self btnRectContainsPoint:curP]; if (btn && btn.selected == NO) { btn.selected = YES; //保存选中的按钮 [self.selectBtnArry addObject:btn]; } //重绘 [self setNeedsDisplay];}- (void)touchesEnded:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{ NSMutableString *str = [NSMutableString string]; //1.取消所有选中的按钮 for (UIButton *btn in self.selectBtnArry) { btn.selected = NO; [str appendFormat:@"%ld", btn.tag]; } //2.清空路径 [self.selectBtnArry removeAllObjects]; [self setNeedsDisplay]; //查看是否是第一次设置密码 NSString *keyPwd = [[NSUserDefaults standardUserDefaults] objectForKey:@"keyPwd"]; if (!keyPwd) { [[NSUserDefaults standardUserDefaults] setObject:str forKey:@"keyPwd"]; [[NSUserDefaults standardUserDefaults] synchronize]; UIAlertView *alertV = [[UIAlertView alloc] initWithTitle:@"第一次设置密码成功" message:nil delegate:nil cancelButtonTitle:@"确定" otherButtonTitles:nil, nil]; [alertV show]; NSLog(@"第一次输入密码"); }else{ if ([keyPwd isEqualToString:str]) {  NSLog(@"密码正确");  UIAlertView *alertV = [[UIAlertView alloc] initWithTitle:@"手势输入正确" message:nil delegate:nil cancelButtonTitle:@"确定" otherButtonTitles:nil, nil];  [alertV show]; }else{  NSLog(@"密码错误");  UIAlertView *alertV = [[UIAlertView alloc] initWithTitle:@"手势输入错误" message:nil delegate:nil cancelButtonTitle:@"确定" otherButtonTitles:nil, nil];  [alertV show]; } } //3.查看当前选中按钮的顺序 NSLog(@"选中按钮顺序为:%@",str);}- (void)drawRect:(CGRect)rect{ if (self.selectBtnArry.count) { //1.创建路径 UIBezierPath *path = [UIBezierPath bezierPath]; //2.取出所有保存的按钮 for (int i = 0; i < self.selectBtnArry.count; i ++) {  UIButton *btn = self.selectBtnArry[i];  //当前按钮是不是第一个按钮  if (i == 0) {  //设置成路径的起点  [path moveToPoint:btn.center];  } else {  //添加一根线到按钮中心  [path addLineToPoint:btn.center];  } } //添加一根线到当前手指所在点 [path addLineToPoint:self.curP]; //设置线宽/颜色 [path setLineWidth:5]; [[UIColor whiteColor] set]; [path setLineJoinStyle:kCGLineJoinRound]; //3.绘制路径 [path stroke]; }}- (void)layoutSubviews{ [super layoutSubviews]; CGFloat x = 0; CGFloat y = 0; CGFloat btnWH = 75; int column = 3; int margin = (self.bounds.size.width - (column * btnWH)) / (column + 1); int currentColumn = 0; int currentRow = 0; for (int i = 0; i < self.subviews.count; i ++) { // 求当前所在的列 currentColumn = i % column; // 求当前所在的行 currentRow = i / column; x = margin + (btnWH + margin) * currentColumn; y = margin + (btnWH + margin) * currentRow; UIButton *btn = self.subviews[i]; btn.frame = CGRectMake(x, y, btnWH, btnWH); }}@end