iOS中使用ZBar扫描二维码自定义扫描界面功能

之前在android中使用过zxing识别二维码，zxing也有对应的ios版本，经过了解，zbar也是一个常用的二维码识别软件，并分别提供了ios和android的sdk可供使用，最终我选择了zbar进行二维码识别，它的注释清晰，便于使用。

zbar为我们提供了两种使用方式，一种是直接调用zbar提供的zbarreaderviewcontroller打开一个扫描界面，另一种方式是使用zbar提供的可以嵌在其他视图中的zbarreaderview，实际项目中我们更可能会使用第二种方式，这可以让我们对界面做更多的定制。

zbar使用起来也非常简单，将zbarsdk导入项目，在需要使用zbar的文件中导入zbarsdk.h头文件即可

#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];
}

github地址:https://github.com/zbar/zbar

以上所述是小编给大家介绍的ios中使用zbar扫描二维码自定义扫描界面，希望对大家有所帮助