Question

我在现有的xcode应用程序中安装了 cocoapods ，并在其中添加了 XLForm 。我正在使用 Xcode版本6.2 ，并且正在使用 objective-c 开发应用程序。然后，当我在安装依赖项后尝试运行项目时，它会在＆＃34; XLFormSectionDescriptor.h＆＃34; 文件中出现以下错误。

我该如何解决这个问题？有什么想法吗？

提前致谢。

Answer 1

您应该更新到最新版本的Xcode，截至本文发布时为7.1.1。如果您有某些原因导致无法执行此操作（例如尚未准备好针对iOS 9 SDK进行编译），则必须删除该代码中的#define nonnull属性。可能最简单的就是定义它。

import java.util.Scanner;
public class Qty_Of_Musicians_With_Details {
    public static void main(String[] args) {

        //Variables
        String nameMember = "";
        String lastName ="";
        String instrument = "";
        String member_LastName = "";    
        String member_Instrument = "";  
        String member_FirstName = "";   
        int qty_OfMember;
        String musician_FirstName = "";
        String musician_LastName = "";
        String musician_Instrument = "" ;

        //my scanner
        Scanner userInput = new Scanner(System.in);

        System.out.println("input number members");
        //read and store user input
        qty_OfMember = userInput.nextInt();

        if(qty_OfMember<=8){
            do{
                //Using FOR LOOP
                for(int i =1;i<=qtyOfMember;i++){
                    //ask for member Full Name
                    System.out.println("enter member# "+i+" full name");

                    //read and store firstname
                    member_FirstName= userInput.next();
                    musician_FirstName = member_FirstName ;

                    //read and store lastname
                    member_LastName = userInput.next();
                    musician_LastName=member_LastName;

                    //Ask for member instrument
                    System.out.println("member instrument");

                    //Read and store member instrument
                    member_Instrument=userInput.next();
                    musician_Instrument=member_Instrument;


                    //print out members names,last_names and instruments  
                    System.out.println(i +"first_name: "+musician_First Name+"\n Last name: "+musician_LastName "\n instrument: "+ musician_Instrument s"\n" );
                }
            //here is the problem,donno how to stop it
            //if user input qty Members == 3

            // after asking each member details loop should stop
            }while(??????????????????????????????????????????????????); 

        }
        else{System.out.println("Sorry but studio can accept max 8 musicians");}

        //System.out.println("name: "+ member1_Name +" Last_name: "+ member_Name" instrument: "+ member_Instrument);

        //closing Scanner
        userInput.close();
    }
}

您可能应该使用检查编译器版本的#ifdef来包围它。比预处理器更熟悉的人必须提供那段代码。

错误是由于引入Xcode 6.x附带的旧版clang不理解的属性引起的。

XLForm Objective-C |未知的属性属性“可空”＆＃39;

1 个答案: