iOS 扫描相册内二维码.

在各类App 当中 二维码的应用已经很普遍了 , 从分享扫描链接 到 支付通道 .

二维码付款

生成/识别 二维码的 相关文章和第三方控件都很多 , 在这里就不多说明了 , 今天分享一个小的功能点 , 就是扫描相册二维码的方法 .
推荐文章 : 原生二维码的扫描和生成 , 二维码 生成/识别 Demo

//设置NavigationItem
- (void)setNavigationItem{
    self.navigationController.navigationBar.tintColor = [UIColor blackColor];
    self.navigationItem.title = @"二维码/条形码";
    UIBarButtonItem *rightBtn = [[UIBarButtonItem alloc]
                                 initWithTitle:@"相册"
                                 style:UIBarButtonItemStylePlain
                                 target:self
                                 action:@selector(openPhoto)];
    self.navigationItem.rightBarButtonItem = rightBtn;
}

//调用相册
- (void)openPhoto {
    //1.判断相册是否可以打开
    if (![UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypePhotoLibrary]) {
        return;
    }
    //2.创建图片选择控制器
    UIImagePickerController *ipc = [[UIImagePickerController alloc]init];
    ipc.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
    ipc.delegate = self;
    //选中之后大图编辑模式
    ipc.allowsEditing = YES;
    [self presentViewController:ipc animated:YES completion:nil];
}

UIImagePickerController的协议方法

//相册获取的照片进行处理
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info{
    // 1.取出选中的图片
    UIImage *pickImage = info[UIImagePickerControllerOriginalImage];
    //转成Data格式
    NSData *imageData = UIImagePNGRepresentation(pickImage);
    
    CIImage *ciImage = [CIImage imageWithData:imageData];
    
    //2.从选中的图片中读取二维码数据
    //2.1创建一个探测器
    CIDetector *detector = [CIDetector detectorOfType:CIDetectorTypeQRCode context:nil options:@{CIDetectorAccuracy: CIDetectorAccuracyHigh}];
    
    // 2.2利用探测器探测数据
    NSArray *feature = [detector featuresInImage:ciImage];
    
    // 2.3取出探测到的数据
    for (CIQRCodeFeature *result in feature) {
        NSString *urlStr = result.messageString;
        
        if([self isPureNumandCharacters:urlStr]){
            //跳转网页
            [SystemFunctions showInSafariWithURLMessage:urlStr Success:^(NSString *token) {
                
            } Failure:^(NSError *error) {
                //            [self showAlertWithTitle:@"该信息无法跳转，详细信息为：" Message:urlStr OptionalAction:@[@"确定"]];
            }];
        
            [picker dismissViewControllerAnimated:YES completion:nil];
            
        }else{
            [UIAlertController createAlertWithTitle:@"" Message:@"二维码信息有误,请重新扫描." currentController:picker OKAction:^(UIAlertAction *action) {
                
                [picker dismissViewControllerAnimated:YES completion:nil];
                
            }];
        }
        //二维码信息回传
        self.block(urlStr);
    }
    if (feature.count == 0) {

        [UIAlertController createAlertWithTitle:@"扫描结果" Message:@"没有扫描到有效二维码" currentController:picker];

    }
}

注意 :

• 代码中的UIAlertController 是我自己封装的类目 . 下载地址