Question

我试图通过ofTTCPClient来填充带有指针数据的向量字符。

指针tmpData正在接收数据，但是如果我尝试将数据推送到向量中，我会收到此错误。

即使我尝试使用char“手动”填充向量，如下所示： tcpMainData.push_back（ 'A'）;

我收到错误：

libc++abi.dylib: terminating with uncaught exception of type std::bad_alloc: std::bad_alloc
(lldb)

这是我的计划：

#include "ofApp.h"

using namespace std;

vector<char> tcpMainData;

//This is a temporary size variabel, until a function is made.
int tmpDataSize = 100;
char tmpData;


//--------------------------------------------------------------
void ofApp::setup(){

}

//--------------------------------------------------------------
void ofApp::update(){

    //Listen on the port for tcp data if we are connected to the server
    if (!TCPClient.isConnected()) {
        state = OFFLINE;
    }else if (TCPClient.isConnected() && state != RECEIVING) {
                state = LISTENING;
    }

    //TCP package received
    if((int)TCPClient.receiveRawBytes((char *) &tcpMainData, sizeOfTcpChunk) > 1 && state == LISTENING) {

        state = RECEIVING;
    }

    //Filling up vector with tcp data
    if (state == RECEIVING) {

        for (int i = 0; i < tmpDataSize; i++) {
            TCPClient.receiveRawBytes((char *) &tmpData, sizeOfTcpChunk);

            tcpMainData.push_back(tmpData);
        }

        state = LISTENING;
    }
}

//--------------------------------------------------------------
void ofApp::draw(){

    if (state == OFFLINE) {
        ofDrawBitmapString("Press C to connect", 50, 100);
    }
}

//--------------------------------------------------------------
void ofApp::keyPressed(int key){

    if (key == 'c') {
        TCPClient.setup("127.0.0.1", TCPPort);
    }
}

如果有相关内容，请提供我的标题：

...

//TCP CONF
ofxTCPClient TCPClient;
int TCPPort = 50014;

int sizeOfTcpChunk = 4;             //Size of TCP packages (Chunks)

//Program state
enum clientState {
    OFFLINE,
    LISTENING,
    RECEIVING,
};

clientState state = LISTENING;

Answer 1

您忽略了错误发生的位置这里有两个错误（我已经将代码中的点放到上下文中）：

vector<char> tcpMainData;
TCPClient.receiveRawBytes((char *) &tcpMainData, sizeOfTcpChunk)

你将向量转换为char *错误。它应该是

(char *) &tcpMainData[0]

我强烈怀疑你可以用这个来写tcpMainData。此演员表仅用于从矢量中读取。我的猜测是，你因此得到了错误信息。

和

char tmpData;
TCPClient.receiveRawBytes((char *) &tmpData, sizeOfTcpChunk);

正如Galik所提到的，tmpData是一个字节。你需要像char tmpData[100]

这样的东西

作为参考，TCPClient.receiveRawBytes函数的签名是：

int ofxTCPClient::receiveRawBytes(char *receiveBytes, int numBytes)

无法将tcp数据收集到矢量openframeworks

1 个答案: