iOS实现手势解锁操作

//添加view中子控件
-(void)awakeFromNib
{
// 创建按钮
 for (int i=0; i<9; i++) {
  self.LineColor=[UIColor blueColor];
 UIButton *btn=[UIButton buttonWithType:UIButtonTypeCustom];
  btn.userInteractionEnabled=NO;
 //  设置按钮属性
 [btn setBackgroundImage:[UIImage imageNamed:@"gesture_node_normal"] forState:UIControlStateNormal];
  [btn setBackgroundImage:[UIImage imageNamed:@"gesture_node_highlighted"] forState:UIControlStateHighlighted ];
  [btn setBackgroundImage:[UIImage imageNamed:@"gesture_node_error"] forState:UIControlStateDisabled];
  [self addSubview:btn];
 }
}
//布局view子控件
-(void)layoutSubviews
{
 [super layoutSubviews];
 CGFloat width=74;
 CGFloat height=74;
 CGFloat Margin=(self.bounds.size.width-3*width)/2;
// 遍历设置9个button的frame
 [self.subviews enumerateObjectsUsingBlock:^(__kindof UIView * _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
//  通过tag设置按钮的索引标识
  obj.tag=idx;
   int row=(int)idx/3;
   int col=idx%3;
  obj.frame=CGRectMake(col*(Margin + width), row*(Margin +height), width, height);
 }];
}

// 加载xib文件
+(instancetype)lockView
{
 return [[[NSBundle mainBundle]loadNibNamed:@"MYblockView" owner:nil options:nil]lastObject];
}

// 设置控制器view的背景图片
 self.view.backgroundColor=[UIColor colorWithPatternImage:[UIImage imageNamed:@"bg"]];
 MYblockView *blockView=[MYblockView lockView];
 blockView.center=self.view.center;
// 将blockview添加到viewController上
 [self.view addSubview:blockView];

@property(nonatomic,strong)NSMutableArray *btnArr;
//懒加载
-(NSMutableArray *)btnArr
{
 if (_btnArr==nil) {
  _btnArr=[NSMutableArray array];
 }
 return _btnArr;
}

#pragma mark----绘制图形
-(void)drawRect:(CGRect)rect
{
 if (self.btnArr.count==0 ) {
  return;
 }
// 创建路径
 UIBezierPath *path=[UIBezierPath bezierPath];
// 遍历所有按钮进行绘制
 [self.btnArr enumerateObjectsUsingBlock:^(__kindof UIButton * _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
//  第一个按钮，中心点就是起点
  if (idx==0) {
   [path moveToPoint:obj.center];
  }else
  {
   [path addLineToPoint:obj.center];
  }
 }];
 [path addLineToPoint:self.currentPoint];
// 设置路径属性
 path.lineWidth=10;
 path.lineCapStyle=kCGLineCapRound;
 path.lineJoinStyle=kCGLineJoinRound;
 [self.LineColor setStroke];
// 渲染
 [path stroke];
}

#pragma mark-----开始触摸
-(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{
// 获取触摸对象
 UITouch *touch=touches.anyObject;
// 获取触摸点
 CGPoint loc=[touch locationInView:self];
// 遍历按钮，判定触摸点是否在按钮上
 [self.subviews enumerateObjectsUsingBlock:^(__kindof UIButton * _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
  BOOL isContains=CGRectContainsPoint(obj.frame, loc);
//  如果在按钮上，将当前按钮保存在数组中，并改变按钮状态
  if (isContains&&obj.highlighted==NO) {
   [self.btnArr addObject:obj];
   obj.highlighted=YES;
  }else
  {
   obj.highlighted=NO;
  }
 }];
}

#pragma mark----开始滑动
-(void)touchesMoved:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{
// 获取触摸对象
 UITouch *touch=touches.anyObject;
// 获取触摸点
 CGPoint loc=[touch locationInView:self];
 self.currentPoint=loc;
// 遍历按钮，如果按钮在滑动路径上，就改变按钮状态
 [self.subviews enumerateObjectsUsingBlock:^(__kindof UIButton * _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
  BOOL isContains=CGRectContainsPoint(obj.frame, loc);
  if (isContains&&obj.highlighted==NO) {
   [self.btnArr addObject:obj];
   obj.highlighted=YES;
  }
 }];
// 重绘
 [self setNeedsDisplay];
  }

#pragma mark----停止滑动结束
-(void)touchesEnded:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{
// 定义最后一个按钮
 UIButton *lastBtn=[self.btnArr lastObject];
// 将最后一个按钮中心点定义为相对滑动的当前点
 self.currentPoint=lastBtn.center;
// 重绘
 [self setNeedsDisplay];
// 判定密码
 self.password=[NSMutableString string];
  [self.btnArr enumerateObjectsUsingBlock:^( UIButton * _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
   [self.password appendFormat:@"%@",@(obj.tag)];
  }];
 NSLog(@"%@",self.password);
 BOOL isOk;
 if ([self.delegate respondsToSelector:@selector(blockView:finishedWithPassword:)]) {
  isOk= [self.delegate blockView:self finishedWithPassword:self.password];
 }
 if (isOk) {
  [self.btnArr enumerateObjectsUsingBlock:^(UIButton* _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
   obj.highlighted=NO;
   
  }];
  [self.btnArr removeAllObjects];
  [self setNeedsDisplay];
  
  NSLog(@"密码正确");
 }else
 {
  NSLog(@"密码错误");
 }

}

#import <UIKit/UIKit.h>
@class MYblockView;
//声明代理
@protocol MYblockViewDelegate <NSObject>
@optional
//代理方法
-(BOOL) blockView:(MYblockView *)blockView finishedWithPassword:(NSString *)password;
@end
@interface MYblockView : UIView
+(instancetype)lockView;
//设置代理成员属性
@property(nonatomic,weak)id<MYblockViewDelegate>delegate;
@end

else
 {
  
//  关闭用户交互
  self.userInteractionEnabled=NO;
  [self.btnArr enumerateObjectsUsingBlock:^(UIButton * _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
   self.LineColor=[UIColor redColor];
   obj.highlighted=NO;
   obj.enabled=NO;
   [self setNeedsDisplay];
   
   dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(1.0 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
//    回复按钮状态
    [self.btnArr enumerateObjectsUsingBlock:^(UIButton * _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
     obj.enabled=YES;    
    }];
//    恢复线条的颜色
    self.LineColor=[UIColor blueColor];
    
    [self.btnArr removeAllObjects];
    
    [self setNeedsDisplay];   
   });
   }]; 
  NSLog(@"密码错误");
 }
 self.userInteractionEnabled=YES;

}

-(BOOL)blockView:(MYblockView *)blockView finishedWithPassword:(NSString *)password
{
 if ([password isEqualToString:@"012"]) {
  
  UIViewController *two=[UIViewController new];
  two.view.backgroundColor=[UIColor greenColor];
  [self.navigationController pushViewController:two animated:YES];
  return YES;
 }
 else{
   return NO;
 }
}

 [self.navigationController.navigationBar setBackgroundColor:[UIColor redColor]];
 [ self.navigationController.navigationBar setTitleTextAttributes:@{
               NSForegroundColorAttributeName :[UIColor whiteColor] 
                  }];