项目说明

• 华中Hackathon比赛项目，获得青云企业奖以及深信服企业奖

• 客户端实现手绘，音频录制，拍照等功能

  手绘记录第几笔和坐标位置

  #import "PBDrawView.h"
  @interface PBDrawView()
  // 三维数组
  @property (nonatomic, strong)NSArray<NSMutableArray*> *singLineArray;
  @end
  @implementation PBDrawView
  - (void)drawRect:(CGRect)rect {
      [super drawRect:rect];
      self.backgroundColor = [UIColor whiteColor];
      for (int i = 0; i < self.lineArray.count; i++) {
          NSArray<NSMutableArray*> *singleLine = self.lineArray[i];
          
          for (int j = 0; j < singleLine[0].count-1; j++) {
              NSNumber *postionBeginX = singleLine[0][j];
              NSNumber *postionBeginY = singleLine[1][j];
              NSNumber *postionEndX = singleLine[0][j+1];
              NSNumber *postionEndY = singleLine[1][j+1];
              
              UIBezierPath *bp = [UIBezierPath bezierPath];  // 用于绘图的对象
              bp.lineWidth = 2;
  
              bp.lineCapStyle = kCGLineCapRound;  // 线的形状
              
              [bp moveToPoint:CGPointMake(postionBeginX.floatValue, postionBeginY.floatValue)  ];  // 将画笔起始点移动到
              [bp addLineToPoint:CGPointMake(postionEndX.floatValue, postionEndY.floatValue)];  // 添加直线的另一点
              [bp stroke];  // 渲染
          }
      }
  }
  - (instancetype)initWithFrame:(CGRect)frame
  {
      self = [super initWithFrame:frame];
      if (self) {
          
          self.lineArray = [[NSMutableArray alloc] init];
          self.backgroundColor = [UIColor whiteColor];
      }
      return self;
  }
  
  - (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{
      NSMutableArray<NSNumber*> *xArray = [[NSMutableArray alloc] init];
      NSMutableArray<NSNumber*> *yArray = [[NSMutableArray alloc] init];
      self.singLineArray = @[xArray,yArray];
      
      NSSet *allTouches = [event allTouches];    //返回与当前接收者有关的所有的触摸对象
      UITouch *touch = [allTouches anyObject];   //视图中的所有对象
      CGPoint point = [touch locationInView:[touch view]]; //返回触摸点在视图中的当前坐标
      NSNumber *x = [NSNumber numberWithInt:point.x];
      NSNumber *y = [NSNumber numberWithInt:point.y];
      [self.singLineArray[0] addObject:x];
      [self.singLineArray[1] addObject:y];
      [self setNeedsDisplay];
      
  }
  
  - (void)touchesMoved:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{
      NSSet *allTouches = [event allTouches];    //返回与当前接收者有关的所有的触摸对象
      UITouch *touch = [allTouches anyObject];   //视图中的所有对象
      CGPoint point = [touch locationInView:[touch view]]; //返回触摸点在视图中的当前坐标
      NSNumber *x = [NSNumber numberWithInt:point.x];
      NSNumber *y = [NSNumber numberWithInt:point.y];
      [self.singLineArray[0] addObject:x];
      [self.singLineArray[1] addObject:y];
      [self setNeedsDisplay];
  }
  
  - (void)touchesEnded:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{
      [self.lineArray addObject:self.singLineArray];
      [self setNeedsDisplay];
  }
  @end