排除HandyJSON中的属性

Question

我使用HandyJSOn框架对Swift3中的对象进行序列化和反序列化。现在我有这个问题，我想排除这个过程中的一些属性。我试图按照GithHub页面上给出的步骤，但我不能让工作：与错误

class MyClass : HandyJSON { 
    private var excludeThisProperty : String 

    public func mapping(mapper: HelpingMapper) { 
    mapper >>> self.excludeThisProperty 
    } 
} 

编译器fials：

binary operator >>> cannot be applied to operands of type HelpingMapper and String 

+++例+++

class MyClass : HandyJSON { 
    private let myPropertyDefault : String? = "example" 
    private var myProperty : String 

    public required init() { 
     myProperty = myPropertyDefault! 
    } 

    public func reset() { 
     myProperty = myPropertyDefault! 
    } 

    public func mapping(mapper: HelpingMapper) { 
     mapper >>> self.myPropertyDefault 
    } 
} 

Answer 1

请您的字符串改为可选：

private var excludeThisProperty : String? 

示例代码：

let jsonString = "{\"excludeThisProperty\":\"sdfsdf\"}" 

if let myclass = MyClass.deserialize(from: jsonString) { 
    print(myclass) 
} 

class MyClass : HandyJSON { 
    private var myPropertyDefault : String? = "example" // changed from let to var 
    private var myProperty : String 

    public required init() { 
     myProperty = myPropertyDefault! 
    } 

    public func reset() { 
     myProperty = myPropertyDefault! 
    } 

    public func mapping(mapper: HelpingMapper) { 
     mapper >>> self.myPropertyDefault 
    } 
}