本文实例为大家分享了iOS手势密码解锁的相关代码，供大家参考，具体内容如下

// // LockView.m // 手势解锁 // // Created by Daniel on 16/4/4. // Copyright © 2016年 Daniel. All rights reserved. // #import "LockView.h" @interface LockView () /** 保存已选中的按钮 */ @property(nonatomic, strong) NSMutableArray *selectedBtn; /** 当前触摸点 */ @property(nonatomic, assign) CGPoint curp; @end @implementation LockView - (NSMutableArray *)selectedBtn { if (_selectedBtn == nil) { _selectedBtn = [NSMutableArray array]; } return _selectedBtn; } - (IBAction)pan:(UIPanGestureRecognizer *)pan { //获取当前触摸点 _curp = [pan locationInView:self]; //判断触摸点在不在按钮上 for (UIButton *btn in self.subviews) { //如果在按钮上就设置选中状态 //触摸点必须在button中心点30范围内才选中，更精确，体验更好 CGRect rect = CGRectMake(btn.center.x, btn.center.y, 30, 30); if (CGRectContainsPoint(rect, _curp) && btn.selected == NO) { btn.selected = YES; //将这个选中的按钮保存起来 [self.selectedBtn addObject:btn]; } } //重绘，调用drawRect方法 [self setNeedsDisplay]; //手指抬起时 if(pan.state == UIGestureRecognizerStateEnded) { NSMutableString *strM = [NSMutableString string]; //如果当前触摸点不在Button上，则手指抬起时，就显示选中的Button以及连线 UIButton *lastBtn = [self.selectedBtn lastObject]; //把最后一个选中按钮的中心点设置为当前触摸点，清除最后多出来的一截连线 _curp = lastBtn.center; for (UIButton *btn in self.selectedBtn) { //保存手势密码 [strM appendFormat:@"%ld", btn.tag]; } //strM就是密码了 NSLog(@"%@",strM); //TODO：对比之前保存的密码，如果对了就直接跳转界面了 //NSLog(@"手指抬起"); //这里了执行完之后系统自动调用了重绘方法 //等待2s后清除所有连线，清除Button的选中状态 dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(1.2 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{ //取消按钮选中 //[self.selectedBtn makeObjectsPerformSelector:@selector(setSelected:) withObject:NO];这句不知道为啥没有效果，只好用循环了 for (UIButton *btn in self.selectedBtn) { [btn setSelected:NO]; } //清除连线，清空选中按钮 [self.selectedBtn removeAllObjects]; [self setNeedsDisplay]; }); } } - (void)drawRect:(CGRect)rect { NSInteger count = self.selectedBtn.count; //如果没有按钮被选中，就不画线 if (count == 0) { return; } UIBezierPath *path = [UIBezierPath bezierPath]; //把所有点都连完线 for (int i = 0; i < count; i++) { UIButton * btn = self.selectedBtn[i]; if (i == 0) { //如果是第一个点，就设置为起点 [path moveToPoint:btn.center]; }else { //添加连线 [path addLineToPoint: btn.center]; } } //画最后一个点到手指触摸点之间的线 [path addLineToPoint:_curp]; [[UIColor greenColor]set]; path.lineJoinStyle = kCGLineJoinRound; path.lineWidth = 8; [path stroke]; } - (void)awakeFromNib { //创建9个按钮 for (int i = 0; i < 9; i++) { UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom]; //不允许与用户交互，也就是点击事件不作处理 btn.userInteractionEnabled = NO; btn.tag = i; [btn setImage:[UIImage imageNamed:@"gesture_node_normal"] forState:UIControlStateNormal]; [btn setImage:[UIImage imageNamed:@"gesture_node_highlighted"] forState:UIControlStateSelected]; [self addSubview:btn]; } } - (void)layoutSubviews { [super layoutSubviews]; //布局子控件 NSInteger count = self.subviews.count; //列数 int cols = 3; CGFloat x = 0; CGFloat y = 0; CGFloat w = 74; CGFloat h = 74; //间距 CGFloat margin = (self.bounds.size.width - w * cols) / (cols + 1); CGFloat col = 0; CGFloat row = 0; for (NSInteger i = 0; i < count; i++) { UIButton *btn = self.subviews[i]; //计算当前button的列行以及xy值 col = i % cols; row = i / cols; x = margin + col * (margin + w); y = row * (margin + w); btn.frame = CGRectMake(x, y, w, h); } } @end

效果图：

以上就是本文的全部内容，希望对大家的学习有所帮助。