优化继承的默认值使用

Author: Mccc

Example/SmartCodable/TestViewController.swift

@@ -34,53 +34,58 @@ class TestViewController: BaseViewController {
 
     override func viewDidLoad() {
         super.viewDidLoad()
-        let jsonString = """
-[
-{
-    "enjoyCount": 1,
-    "commentCount": 1,
-},
-{
-    "enjoyCount": 2,
-    "commentCount": 2,
-},
-{
-    "enjoyCount": 2,
-    "commentCount": 2,
+
+        let dict: [String: Any] = [
+            "size": 1,
+            "id": 2,
+            "name": "Mccc"
+        ]
+        
+        guard let model = C.deserialize(from: dict) else { return }
+
+        print(model.size)
+        print(model.id)
+        print(model.name)
+    }
 }
-]
+
+class A: SmartCodable {
+    var size: Int?
+    @IgnoredKey
+    var attr: NSMutableAttributedString?
+    required init() { }
+}
+
+class B: A {
+    var name: String?
 
-"""
-        guard let models = [RecommendModel].deserialize(from: jsonString) else {
-            return
-        }
-        print(models)
-        print("\n")
+    enum CodingKeys: CodingKey {
+        case name
+    }
+    required init(from decoder: any Decoder) throws {
+        try super.init(from: decoder)
 
-        let uniqueRecommends = Array(Set(models))
-        print(uniqueRecommends)
+        let container = try decoder.container(keyedBy: CodingKeys.self)
+        self.name = try container.decodeIfPresent(String.self, forKey: .name)
     }
-    
-    struct RecommendModel: SmartCodable, Equatable, Hashable {
+    required init() {
+        super.init()
+    }
+}
 
-        /// 点赞数
-        var enjoyCount: Int = 0
-        /// 评论数
-        var commentCount: Int = 0
-        
-        @IgnoredKey
-        var priceText: NSAttributedString? // 价格富文本
-        
-        
-        static func == (lhs: RecommendModel, rhs: RecommendModel) -> Bool {
-            return true
-        }
+
+class C: B {
+    var id: Int?
+    enum CodingKeys: CodingKey {
+        case id
+    }
+    required init(from decoder: any Decoder) throws {
+        try super.init(from: decoder)
 
-        // 手动实现 Hashable 协议
-        func hash(into hasher: inout Hasher) {
-            hasher.combine(enjoyCount)
-            hasher.combine(commentCount)
-        }
+        let container = try decoder.container(keyedBy: CodingKeys.self)
+        self.id = try container.decodeIfPresent(Int.self, forKey: .id)
+    }
+    required init() {
+        super.init()
     }
-    
 }

SmartCodable/Classes/JSONDecoder/Decoder/DecodingCache.swift

@@ -26,25 +26,29 @@ class DecodingCache {
 
     /// Cache the initial state of a Decodable object.
     func cacheInitialState<T: Decodable>(for type: T.Type) {
-        
-        
         if let object = type as? SmartDecodable.Type {
-        
             decodedType = object
-            
             var snapshot = Snapshot()
 
             let instance = object.init()
-            let mirror = Mirror(reflecting: instance)
-            mirror.children.forEach { child in
-                if let key = child.label {
-                    snapshot.initialValues[key] = child.value
+            // 递归处理所有的 superclassMirror
+            func captureInitialValues(from mirror: Mirror) {
+                mirror.children.forEach { child in
+                    if let key = child.label {
+                        snapshot.initialValues[key] = child.value
+                    }
+                }
+                if let superclassMirror = mirror.superclassMirror {
+                    captureInitialValues(from: superclassMirror)
                 }
             }
-            snapshot.typeName = "\(type)"
+            // 获取当前类和所有父类的属性值
+            let mirror = Mirror(reflecting: instance)
+            captureInitialValues(from: mirror)
+            
 
+            snapshot.typeName = "\(type)"
             snapshot.transformers = object.mappingForValue() ?? []
-            
             snapshots.append(snapshot)
         }
     }
@@ -86,7 +90,6 @@ class DecodingCache {
                 }
             }
         }
-
         return nil
     }