将Java转换为目标C

我正在尝试将 Java代码转换为Objective-C.下面的课程是.的扩展
TestCodeRequest.想知道如何将其转换为目标C等价物.我发现它有点令人困惑,因为Java是静态类型的,并且配置超过了约定.而Objective-C是动态类型的,而且是约定优于配置.我在下面有一个示例代码.任何小提示都应该非常棒.

package com.TestCode.api;

import java.io.IOException;

import oauth.signpost.exception.OAuthCommunicationException;
import oauth.signpost.exception.OAuthExpectationFailedException;
import oauth.signpost.exception.OAuthMessageSignerException;

import org.json.JSONObject;

public class Categories extends TestCodeRequest {

    public Categories(String apiKey,String apiSecret) {
            super(apiKey,apiSecret,"categories");
    }

    public Categories field(Object... fields) {
        super.field(fields);
        return this;
    }

    public JSONObject getCategories() throws OAuthMessageSignerException,OAuthExpectationFailedException,OAuthCommunicationException,IOException {
        return this.get();
    }

    public Categories categoriesField(Object... fields) {
        return this.field(fields);
    }

}