1增加 错误 枚举类型 2修改 扫码无结果不返回 为 扫码返回空错误类型

Source/LBXScanViewController.swift

@@ -97,7 +97,11 @@ open class LBXScanViewController: UIViewController {
                                             // 停止扫描动画
                                             strongSelf.qRScanView?.stopScanAnimation()
                                         }
-                                        strongSelf.handleCodeResult(arrayResult: arrayResult)
+                                        if !arrayResult.isEmpty {
+                                            strongSelf.handleCodeResult(reslut: .success(arrayResult))
+                                        } else {
+                                            strongSelf.handleCodeResult(reslut: .failure(.noResult))
+                                        }
                                      })
         }
 
@@ -126,7 +130,7 @@ open class LBXScanViewController: UIViewController {
     /**
      处理扫码结果，如果是继承本控制器的，可以重写该方法,作出相应地处理，或者设置delegate作出相应处理
      */
-    open func handleCodeResult(arrayResult: [LBXScanResult]) {
+    open func handleCodeResult(reslut: Result<[LBXScanResult], LBXError>) {
         guard let delegate = scanResultDelegate else {
             fatalError("you must set scanResultDelegate or override this method without super keyword")
         }
@@ -136,11 +140,17 @@ open class LBXScanViewController: UIViewController {
 
         }
 
-        if let result = arrayResult.first {
-            delegate.scanFinished(scanResult: result, error: nil)
-        } else {
+        switch reslut {
+        case .success(let array):
+            if let result = array.first {
+                delegate.scanFinished(scanResult: result, error: nil)
+            } else {
+                let result = LBXScanResult(str: nil, img: nil, barCodeType: nil, corner: nil)
+                delegate.scanFinished(scanResult: result, error: "no scan result")
+            }
+        case .failure(let error):
             let result = LBXScanResult(str: nil, img: nil, barCodeType: nil, corner: nil)
-            delegate.scanFinished(scanResult: result, error: "no scan result")
+            delegate.scanFinished(scanResult: result, error: error.rawValue)
         }
     }
 
@@ -176,7 +186,9 @@ extension LBXScanViewController: UIImagePickerControllerDelegate, UINavigationCo
         }
         let arrayResult = LBXScanWrapper.recognizeQRImage(image: image)
         if !arrayResult.isEmpty {
-            handleCodeResult(arrayResult: arrayResult)
+            handleCodeResult(reslut: .success(arrayResult))
+        } else {
+            handleCodeResult(reslut: .failure(.noResult))
         }
     }
 

Source/LBXScanViewStyle.swift

@@ -76,3 +76,31 @@ public struct LBXScanViewStyle {
     public init() { }
 
 }
+
+
+
+public enum LBXError: Error, RawRepresentable {
+    public typealias RawValue = String
+
+    public init?(rawValue: String) {
+        switch rawValue {
+        case "nr":
+            self = .noResult
+        default:
+            self = .none
+        }
+    }
+
+    public var rawValue: RawValue {
+        switch self {
+        case .noResult:
+            return "No scan result"
+        default:
+            return "Unknown"
+        }
+    }
+
+    case noResult
+    case none
+
+}

swiftScan/QQScanViewController.swift

@@ -53,19 +53,26 @@ class QQScanViewController: LBXScanViewController {
         drawBottomItems()
     }
 
-    override func handleCodeResult(arrayResult: [LBXScanResult]) {
-
-        for result: LBXScanResult in arrayResult {
-            if let str = result.strScanned {
-                print(str)
+
+    override func handleCodeResult(reslut: Result<[LBXScanResult], LBXError>) {
+        switch reslut {
+        case .success(let array):
+            for result: LBXScanResult in array {
+                if let str = result.strScanned {
+                    print(str)
+                }
+            }
+            let vc = ScanResultController()
+            vc.codeResult = array.first!
+            navigationController?.pushViewController(vc, animated: true)
+        default:
+            let alert = UIAlertController(title: "no scan result", message: nil, preferredStyle: .alert)
+            alert.addAction(UIAlertAction(title: "OK", style: .cancel, handler: { (_) in
+            }))
+            if !(self.navigationController?.visibleViewController?.isKind(of: UIAlertController.self))! {
+                self.present(alert, animated: true, completion: nil)
             }
         }
-
-        let result: LBXScanResult = arrayResult[0]
-
-        let vc = ScanResultController()
-        vc.codeResult = result
-        navigationController?.pushViewController(vc, animated: true)
     }
 
     func drawBottomItems() {