之前在Android中使用過ZXing識別二維碼，ZXing也有對應的iOS版本，經過了解，ZBar也是一個常用的二維碼識別軟件，並分別提供了iOS和Android的SDK可供使用，最終我選擇了ZBar進行二維碼識別，它的注釋清晰，便於使用。

ZBar為我們提供了兩種使用方式，一種是直接調用ZBar提供的ZBarReaderViewController打開一個掃描界面，另一種方式是使用ZBar提供的可以嵌在其他視圖中的ZBarReaderView，實際項目中我們更可能會使用第二種方式，這可以讓我們對界面做更多的定制。

ZBar使用起來也非常簡單，將ZBarSDK導入項目，在需要使用ZBar的文件中導入ZBarSDK.h頭文件即可

#pragma mark 初始化掃描
- (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;//使用手勢變焦
  readview.trackingColor = [UIColor redColor];
  readview.showsFPS = NO;// 顯示幀率 YES 顯示 NO 不顯示
  //readview.scanCrop = CGRectMake(0, 0, 1, 1);//將被掃描的圖像的區域
  UIImage *hbImage=[UIImage imageNamed:@"pick_bg.png"];
  scanZomeBack=[[UIImageView alloc] initWithImage:hbImage];
  //添加一個背景圖片
  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];//將被掃描的圖像的區域
  [readview addSubview:scanZomeBack];
  [readview addSubview:readLineView];
  [self.view addSubview:readview];
  [readview start];
}

#pragma mark 獲取掃描區域
-(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 掃描動畫
-(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的代碼寫在這裡
             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 獲取掃描結果
- (void)readerView:(ZBarReaderView *)readerView didReadSymbols:(ZBarSymbolSet *)symbols fromImage:(UIImage *)image
{
  // 得到掃描的條碼內容
  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二維碼
  }
  for (ZBarSymbol *symbol in symbols) {
    [sTxtField setText:symbol.data];
    break;
  }
  [readerView stop];
  [readerView removeFromSuperview];
}

github地址:https://github.com/ZBar/ZBar

以上所述是小編給大家介紹的iOS中使用ZBar掃描二維碼自定義掃描界面，希望對大家有所幫助，如果大家有任何疑問請給我留言，小編會及時回復大家的。在此也非常感謝大家對本站網站的支持！