iOS实现九宫格连线手势解锁

本文实例为大家分享了ios实现九宫格连线手势解锁的具体代码，供大家参考，具体内容如下

demo下载地址：

效果图：

核心代码：

//
// 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

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。