iOS仿邮箱大师的九宫格手势密码解锁

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。