Question

我需要在ViewController中使用C ++单例，并且出错。

TradeAPIManager.h

 #include <stdio.h>
    class TradeAPIManager{
    public:
        static TradeAPIManager * getInstance();
            void test();
    private:
        TradeAPIManager(){}
        static TradeAPIManager *m_pInstance;
    };

TradeAPIManager.cpp

#include "TradeAPIManager.h"
TradeAPIManager *TradeAPIManager::m_pInstance = nullptr;
TradeAPIManager *TradeAPIManager::getInstance(){
    if(m_pInstance == nullptr){
        m_pInstance = new TradeAPIManager();
    }
    return m_pInstance;
}

void test(){
    printf("asdasd");
}

ViewController.mm

- (void)viewDidLoad {
    [super viewDidLoad];
    TradeAPIManager *manager = TradeAPIManager::getInstance();
    manager->test();
}

构建时，我得到这样的错误：

Undefined symbols for architecture x86_64:
  "TradeAPIManager::test()", referenced from:
      -[ViewController viewDidLoad] in ViewController.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

模拟器中架构x86_64的未定义符号

我的iPhone中架构arm64的未定义符号

那不是.a lib或框架，只是我自己编写的cpp文件我尝试了六个小时但没有出路。希望有人能提供帮助非常感谢

如何在Objective-C中使用C ++单例？

0 个答案: