diff --git a/Document/README/Usages.md b/Document/README/Usages.md
index 5d759ab..5b7d637 100644
--- a/Document/README/Usages.md
+++ b/Document/README/Usages.md
@@ -511,7 +511,9 @@ class Model: SmartDecodable {
 
 Inheritance does not have a particularly good implementation in Codable, but SmartCodable provides a combination (@SmartFlat) that indirectly implements inheritance requirements.
 
-继承在Codable中没有特别好的实现方案， SmartCodable提供了组合方式（@SmartFlat）用来间接实现继承的需求。
+继承在Codable中没有特别好的实现方案， 这里提供两种方案：
+
+1. SmartCodable提供了组合方式（@SmartFlat）用来间接实现继承的需求。
 
 ```
 let jsonString = """
@@ -539,7 +541,38 @@ struct SubModel: SmartCodable {
 }
 ```
 
-
+2. 重写`init(from decoder: Decoder) `  方法，接管解析。
+
+   ```
+   class BaseModel: SmartCodable {
+       var name: String = ""
+       var age: Int = 0
+       
+       enum CodingKeys: CodingKey {
+           case name
+           case age
+       }   
+       required init() { }
+   }
+   
+   class SubModel: BaseModel {
+       var nickName: String = ""    
+       enum CodingKeys: CodingKey {
+           case nickName
+       }
+       required init(from decoder: Decoder) throws {
+           try super.init(from: decoder)   
+           let container = try decoder.container(keyedBy: CodingKeys.self)
+           self.nickName = try container.decode(String.self, forKey: .nickName)
+       }
+       
+       required init() {
+           super.init()
+       }
+   }
+   ```
+
+   
 
 ### Update Existing Model（更新现有模型）
 
diff --git a/Example/Podfile.lock b/Example/Podfile.lock
index fd4e633..d969bd5 100644
--- a/Example/Podfile.lock
+++ b/Example/Podfile.lock
@@ -8,7 +8,7 @@ PODS:
   - FBSnapshotTestCase/SwiftSupport (2.1.4):
     - FBSnapshotTestCase/Core
   - HandyJSON (5.0.0-beta.1)
-  - SmartCodable (4.1.11-beta.3)
+  - SmartCodable (4.2.0)
   - SnapKit (5.6.0)
 
 DEPENDENCIES:
@@ -39,7 +39,7 @@ SPEC CHECKSUMS:
   CleanJSON: 910a36465ce4829e264a902ccf6d1455fdd9f980
   FBSnapshotTestCase: 094f9f314decbabe373b87cc339bea235a63e07a
   HandyJSON: 582477127ab3ab65bd2e471815f1a7b846856978
-  SmartCodable: 5429462702dd8ac32fb664d98c367120cd331d37
+  SmartCodable: e1b30d724aa0c1c82964a8cef06709dc93154f4f
   SnapKit: e01d52ebb8ddbc333eefe2132acf85c8227d9c25
 
 PODFILE CHECKSUM: 7f3af03f81934df0c035518074a7abbec8fa9d3f
diff --git a/Example/Pods/Local Podspecs/SmartCodable.podspec.json b/Example/Pods/Local Podspecs/SmartCodable.podspec.json
index 853fc4f..2f59c56 100644
--- a/Example/Pods/Local Podspecs/SmartCodable.podspec.json	
+++ b/Example/Pods/Local Podspecs/SmartCodable.podspec.json	
@@ -1,6 +1,6 @@
 {
   "name": "SmartCodable",
-  "version": "4.1.11-beta.3",
+  "version": "4.2.0",
   "summary": "数据解析库",
   "homepage": "https://github.com/intsig171",
   "license": {
@@ -12,7 +12,7 @@
   },
   "source": {
     "git": "https://github.com/intsig171/SmartCodable.git",
-    "tag": "4.1.11-beta.3"
+    "tag": "4.2.0"
   },
   "platforms": {
     "ios": "11.0",
diff --git a/Example/Pods/Manifest.lock b/Example/Pods/Manifest.lock
index fd4e633..d969bd5 100644
--- a/Example/Pods/Manifest.lock
+++ b/Example/Pods/Manifest.lock
@@ -8,7 +8,7 @@ PODS:
   - FBSnapshotTestCase/SwiftSupport (2.1.4):
     - FBSnapshotTestCase/Core
   - HandyJSON (5.0.0-beta.1)
-  - SmartCodable (4.1.11-beta.3)
+  - SmartCodable (4.2.0)
   - SnapKit (5.6.0)
 
 DEPENDENCIES:
@@ -39,7 +39,7 @@ SPEC CHECKSUMS:
   CleanJSON: 910a36465ce4829e264a902ccf6d1455fdd9f980
   FBSnapshotTestCase: 094f9f314decbabe373b87cc339bea235a63e07a
   HandyJSON: 582477127ab3ab65bd2e471815f1a7b846856978
-  SmartCodable: 5429462702dd8ac32fb664d98c367120cd331d37
+  SmartCodable: e1b30d724aa0c1c82964a8cef06709dc93154f4f
   SnapKit: e01d52ebb8ddbc333eefe2132acf85c8227d9c25
 
 PODFILE CHECKSUM: 7f3af03f81934df0c035518074a7abbec8fa9d3f
diff --git a/Example/Pods/Target Support Files/SmartCodable/SmartCodable-Info.plist b/Example/Pods/Target Support Files/SmartCodable/SmartCodable-Info.plist
index cfd36e1..0ea6281 100644
--- a/Example/Pods/Target Support Files/SmartCodable/SmartCodable-Info.plist	
+++ b/Example/Pods/Target Support Files/SmartCodable/SmartCodable-Info.plist	
@@ -15,7 +15,7 @@
   <key>CFBundlePackageType</key>
   <string>FMWK</string>
   <key>CFBundleShortVersionString</key>
-  <string>4.1.11</string>
+  <string>4.2.0</string>
   <key>CFBundleSignature</key>
   <string>????</string>
   <key>CFBundleVersion</key>
diff --git a/SmartCodable.podspec b/SmartCodable.podspec
index f64733f..1a1492c 100644
--- a/SmartCodable.podspec
+++ b/SmartCodable.podspec
@@ -12,7 +12,7 @@
 
 Pod::Spec.new do |s|
   s.name             = 'SmartCodable'
-  s.version          = '4.1.11-beta.4'
+  s.version          = '4.2.0'
   s.summary          = '数据解析库'
   
   s.homepage         = 'https://github.com/intsig171'