进阶指南

• 在 10.1.60 及以上且 10.2.3.5 之前的版本基线中使用扫码功能，请参考 标准 UI 下使用扫一扫 和 自定义 UI 下使用扫一扫。

• 在 10.2.3.5 及以上版本基线中使用扫码功能，请参考 多码识别。

标准 UI 下使用扫一扫

在标准 UI 下修改扫码所在页面的参数。

```objectivec
- (void)custoDefaultScan {
   TBScanViewController *vc = [[MPScanCodeAdapterInterface sharedInstance] createDefaultScanPageWithallback:^(id  _Nonnull result, BOOL keepAlive) {
        UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"" message:result[@"resp_result"] delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil, nil];
        alert.tag = 1001;
        [alert show];
    }];
    [self.navigationController pushViewController:vc animated:YES];
    self.scanVC =  vc;

    // 设置扫码界面 title
    vc.title = @"标准扫码";

    // 设置打开手电筒提示文字
    vc.torchStateNormalTitle = @"打开手电筒";

    // 设置关闭手电筒提示文字
    vc.torchStateSelectedTitle = @"关闭手电筒";

    // 设置扫码识别类型
    vc.scanType =  ScanType_QRCode;

    // 设置选择相册按钮
    vc.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithImage:APCommonUILoadImage(@"camera") style:UIBarButtonItemStylePlain target:self action:@selector(selectPhotos)];

}

- (void)selectPhotos
{
    [self.scanVC scanPhotoLibrary];
}
```

自定义 UI 下使用扫一扫

若您需要完全自定义扫码 UI 界面，可自定义扫码页并让其继承 TBScanViewController。

• 创建扫码页，并自定义扫码区。

    @interface MPScanCodeViewController : TBScanViewController <TBScanViewControllerDelegate>
  
    @end
  
    @implementation MPScanCodeViewController
  
    - (instancetype)init
    {
        if (self = [super init])
        {
            self.delegate = self;
            self.scanType = ScanType_All_Code;
        }
        return self;
    }
  
    - (void)viewDidLoad {
        [super viewDidLoad];
        // Do any additional setup after loading the view.
        self.title = @"扫码";
  
        // 自定义扫码界面大小
        CGRect rect = [MPScanCodeViewController constructScanAnimationRect];
        self.rectOfInterest = rect;
  
        // 自定义相册按钮
        self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"选择相册" style:UIBarButtonItemStylePlain target:self action:@selector(selectPhoto)];
    }
  
    + (CGRect)constructScanAnimationRect
    {
        CGSize screenXY = [UIScreen mainScreen].bounds.size;
        NSInteger focusFrameWH = screenXY.width / 320 * 220;//as wx
        int offet = 10;
        if (screenXY.height == 568)
            offet = 19;
  
        return CGRectMake((screenXY.width - focusFrameWH) / 2,
                          (screenXY.height - 64 - focusFrameWH - 83 - 50 - offet) / 2 + 64,
                          focusFrameWH,
                          focusFrameWH);
    }
  
    -(void)buildContainerView:(UIView*)containerView
    {
        // 自定义扫码框 view
        UIView* bg = [[UIView alloc] initWithFrame:containerView.bounds];
        [containerView addSubview:bg];
        CGRect rect = [MPScanCodeViewController constructScanAnimationRect];
        UIView* view = [[UIView alloc] initWithFrame:rect];
        view.backgroundColor = [UIColor orangeColor];
        view.alpha = 0.5;
        [bg addSubview:view];
    }
  
    - (void)selectPhoto
    {
        [self scanPhotoLibrary];
    }

• 处理扫码结果。

    -(void)didFind:(NSArray<TBScanResult*>*)resultArray
    {
        TBScanResult *result = resultArray.firstObject;
        NSString* content = result.data;
        if (result.resultType == TBScanResultTypeQRCode) {
            content = [NSString stringWithFormat:@"qrcode:%@, hiddenData:%@, TBScanQRCodeResultType:%@", result.data, result.hiddenData, [result.extData objectForKey:TBScanResultTypeQRCode]];
            NSLog(@"subType is %@, ScanType_QRCode is %@", @(result.subType), @(ScanType_QRCode));
        } else if (result.resultType == TBScanResultTypeVLGen3Code) {
            content = [NSString stringWithFormat:@"gen3:%@", result.data];
            NSLog(@"subType is %@, ScanType_GEN3 is %@", @(result.subType), @(ScanType_GEN3));
        } else if (result.resultType == TBScanResultTypeGoodsBarcode) {
            content = [NSString stringWithFormat:@"barcode:%@", result.data];
            NSLog(@"subType is %@, EAN13 is %@", @(result.subType), @(EAN13));
        } else if (result.resultType == TBScanResultTypeDataMatrixCode) {
            content = [NSString stringWithFormat:@"dm:%@", result.data];
            NSLog(@"subType is %@, ScanType_DATAMATRIX is %@", @(result.subType), @(ScanType_DATAMATRIX));
        } else if (result.resultType == TBScanResultTypeExpressCode) {
            content = [NSString stringWithFormat:@"express:%@", result.data];
            NSLog(@"subType is %@, ScanType_FASTMAIL is %@", @(result.subType), @(ScanType_FASTMAIL));
        }
        dispatch_async(dispatch_get_main_queue(), ^{
            UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"" message:content delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil, nil];
            alert.tag = 9999;
            [alert show];
        });
    }

• 持续扫码。

    - (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex{
        // 持续扫码
        [self resumeScan];
    }

• 本地相册识别失败的回调。

    - (void)scanPhotoFailed
    {
        // 相册识别失败的回调
        NSLog(@"scanPhotoFailed");
    }

• 其他回调处理。

    - (void)cameraPermissionDenied
    {
        [self.navigationController popViewControllerAnimated:YES];
    }
  
    - (void)cameraDidStart
    {
        NSLog(@"started!!");
    }
  
    -(void)setTorchState:(TorchState)bState
    {
        NSLog(@"TorchState:%lu", (unsigned long)bState);
    }
  
    -(void)userTrack:(NSString*)name
    {
        NSLog(@"userTrack:%@", name);
    }
  
    -(void)userTrack:(NSString*)name args:(NSDictionary*)data
    {
        NSLog(@"userTrack:%@, args:%@", name, data);
    }
  
    - (void)scanPhotoFailed
    {
        // 相册识别失败的回调
        NSLog(@"scanPhotoFailed");
    }