本文實例為大家分享了iOS手勢密碼解鎖的相關代碼，供大家參考，具體內容如下

//
// LockView.m
// 手勢解鎖
//
// Created by Daniel on 16/4/4.
// Copyright © 2016年 Daniel. All rights reserved.
//
 
 
#import "LockView.h"
 
@interface LockView ()
 
/** 保存已選中的按鈕 */
@property(nonatomic, strong) NSMutableArray *selectedBtn;
/** 當前觸摸點 */
@property(nonatomic, assign) CGPoint curp;
@end
 
@implementation LockView
 
- (NSMutableArray *)selectedBtn {
  if (_selectedBtn == nil) {
    _selectedBtn = [NSMutableArray array];
  }
  return _selectedBtn;
}
 
- (IBAction)pan:(UIPanGestureRecognizer *)pan {
   
  //獲取當前觸摸點
  _curp = [pan locationInView:self];
   
  //判斷觸摸點在不在按鈕上
  for (UIButton *btn in self.subviews) {
    //如果在按鈕上就設置選中狀態
     
    //觸摸點必須在button中心點30范圍內才選中，更精確，體驗更好
    CGRect rect = CGRectMake(btn.center.x, btn.center.y, 30, 30);
     
    if (CGRectContainsPoint(rect, _curp) && btn.selected == NO) {
      btn.selected = YES;
       
      //將這個選中的按鈕保存起來
      [self.selectedBtn addObject:btn];
       
       
    }
  }
   
  //重繪，調用drawRect方法
  [self setNeedsDisplay];
   
  //手指抬起時
  if(pan.state == UIGestureRecognizerStateEnded) {
     
    NSMutableString *strM = [NSMutableString string];
     
    //如果當前觸摸點不在Button上，則手指抬起時，就顯示選中的Button以及連線
    UIButton *lastBtn = [self.selectedBtn lastObject];
     
    //把最後一個選中按鈕的中心點設置為當前觸摸點，清除最後多出來的一截連線
    _curp = lastBtn.center;
 
    for (UIButton *btn in self.selectedBtn) {
      //保存手勢密碼
      [strM appendFormat:@"%ld", btn.tag];
    }
     
    //strM就是密碼了
    NSLog(@"%@",strM);
     
    //TODO：對比之前保存的密碼，如果對了就直接跳轉界面了
     
    //NSLog(@"手指抬起");
    //這裡了執行完之後系統自動調用了重繪方法
     
    //等待2s後清除所有連線，清除Button的選中狀態
    dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(1.2 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
      //取消按鈕選中
      //[self.selectedBtn makeObjectsPerformSelector:@selector(setSelected:) withObject:NO];這句不知道為啥沒有效果，只好用循環了
      for (UIButton *btn in self.selectedBtn) {
        [btn setSelected:NO];
      }
      //清除連線，清空選中按鈕
      [self.selectedBtn removeAllObjects];
      [self setNeedsDisplay];
    });
     
  }
   
   
}
 
- (void)drawRect:(CGRect)rect {
 
  NSInteger count = self.selectedBtn.count;
   
  //如果沒有按鈕被選中，就不畫線
  if (count == 0) {
    return;
  }
   
  UIBezierPath *path = [UIBezierPath bezierPath];
   
  //把所有點都連完線
  for (int i = 0; i < count; i++) {
    UIButton * btn = self.selectedBtn[i];
    if (i == 0) {
      //如果是第一個點，就設置為起點
      [path moveToPoint:btn.center];
    }else {
      //添加連線
      [path addLineToPoint: btn.center];
    }
  }
   
  //畫最後一個點到手指觸摸點之間的線
  [path addLineToPoint:_curp];
   
  [[UIColor greenColor]set];
  path.lineJoinStyle = kCGLineJoinRound;
  path.lineWidth = 8;
  [path stroke];
   
}
 
- (void)awakeFromNib {
   
  //創建9個按鈕
  for (int i = 0; i < 9; i++) {
    UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];
     
    //不允許與用戶交互，也就是點擊事件不作處理
    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;
  //列數
  int cols = 3;
   
  CGFloat x = 0;
  CGFloat y = 0;
  CGFloat w = 74;
  CGFloat h = 74;
  //間距
  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];
     
    //計算當前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

效果圖：

以上就是本文的全部內容，希望對大家的學習有所幫助。