iOS中使用ZBar扫描二维码自定义扫描界面

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

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#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];       }

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#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); }

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#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];             }