iOS中使用ZBar扫描二维码自定义扫描界面功能

#pragma mark 初始化扫描
- (void)InitScan
{
  readview = [ZBarReaderView new];
  readview.backgroundColor = [UIColor clearColor];
  readview.frame = CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height);
  readview.readerDelegate = self;
  readview.allowsPinchZoom = YES;//使用手势变焦
  readview.trackingColor = [UIColor redColor];
  readview.showsFPS = NO;// 显示帧率 YES 显示 NO 不显示
  //readview.scanCrop = CGRectMake(0, 0, 1, 1);//将被扫描的图像的区域
  UIImage *hbImage=[UIImage imageNamed:@"pick_bg.png"];
  scanZomeBack=[[UIImageView alloc] initWithImage:hbImage];
  //添加一个背景图片
  CGRect mImagerect=CGRectMake((readview.frame.size.width-200)/2.0, (readview.frame.size.height-200)/2.0, 200, 200);
  [scanZomeBack setFrame:mImagerect];
  readview.scanCrop = [self getScanCrop:mImagerect readerViewBounds:readview.bounds];//将被扫描的图像的区域
  [readview addSubview:scanZomeBack];
  [readview addSubview:readLineView];
  [self.view addSubview:readview];
  [readview start];
}

#pragma mark 获取扫描区域
-(CGRect)getScanCrop:(CGRect)rect readerViewBounds:(CGRect)readerViewBounds
{
  CGFloat x,y,width,height;
  x = rect.origin.x / readerViewBounds.size.width;
  y = rect.origin.y / readerViewBounds.size.height;
  width = rect.size.width / readerViewBounds.size.width;
  height = rect.size.height / readerViewBounds.size.height;
  return CGRectMake(x, y, width, height);
}

#pragma mark 扫描动画
-(void)loopDrawLine
{
  CGRect rect = CGRectMake(scanZomeBack.frame.origin.x, scanZomeBack.frame.origin.y, scanZomeBack.frame.size.width, 2);
  if (readLineView) {
    [readLineView removeFromSuperview];
  }
  readLineView = [[UIImageView alloc] initWithFrame:rect];
  [readLineView setImage:[UIImage imageNamed:@"line.png"]];
  [UIView animateWithDuration:3.0
             delay: 0.0
            options: UIViewAnimationOptionCurveEaseIn
           animations:^{
             //修改fream的代码写在这里
             readLineView.frame =CGRectMake(scanZomeBack.frame.origin.x, scanZomeBack.frame.origin.y+scanZomeBack.frame.size.height, scanZomeBack.frame.size.width, 2);
             [readLineView setAnimationRepeatCount:0];
           }
           completion:^(BOOL finished){
             if (!is_Anmotion) {
               [self loopDrawLine];
             }
           }];
  [readview addSubview:readLineView];
}

#pragma mark 获取扫描结果
- (void)readerView:(ZBarReaderView *)readerView didReadSymbols:(ZBarSymbolSet *)symbols fromImage:(UIImage *)image
{
  // 得到扫描的条码内容
  const zbar_symbol_t *symbol = zbar_symbol_set_first_symbol(symbols.zbarSymbolSet);
  NSString *symbolStr = [NSString stringWithUTF8String: zbar_symbol_get_data(symbol)];
  if (zbar_symbol_get_type(symbol) == ZBAR_QRCODE) {
    // 是否QR二维码
  }
  for (ZBarSymbol *symbol in symbols) {
    [sTxtField setText:symbol.data];
    break;
  }
  [readerView stop];
  [readerView removeFromSuperview];
}