[英]Qt error: symbol(s) not found for architecture x86_64 on Mac OS X Yosemite
在Mac OS X 10.10和Xcode 6.1.1上使用qt5.4編寫的程序在嘗試編譯時出現以下錯誤:
error: symbol(s) not found for architecture x86_64
編譯器輸出顯示:
Undefined symbols for architecture x86_64:
"data::SingleLineData", referenced from:
MainWindow::on_pushButton_clicked() in mainwindow.o
MainWindow::on_pushButton_2_clicked() in mainwindow.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make: *** [Integral.app/Contents/MacOS/Integral] Error 1
22:52:25: The process "/usr/bin/make" exited with code 2.
Error while building/deploying project Integral (kit: Desktop Qt 5.4.0 clang 64bit)
When executing step "Make"
這是我的mainwindow.h
#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include <QMainWindow>
namespace Ui {
class MainWindow;
}
class data{
public:
static QVector<double> SingleLineData;
};
class MainWindow : public QMainWindow
{
Q_OBJECT
public:
explicit MainWindow(QWidget *parent = 0);
~MainWindow();
private slots:
void on_pushButton_clicked();
void on_pushButton_2_clicked();
private:
Ui::MainWindow *ui;
};
#endif // MAINWINDOW_H
還有我的mainwindow.cpp
#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QFile>
#include <QTextStream>
#include <QtCore>
#include <QTextBrowser>
#include <QCheckBox>
#include <QDebug>
#include <QFileDialog>
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
}
MainWindow::~MainWindow()
{
delete ui;
}
void MainWindow::on_pushButton_clicked()
{
data::SingleLineData.resize(512);
QString test;
QString inputfile = QFileDialog::getOpenFileName(
this,
tr("Open File"),
"/Users",
"All files (*.*)"
);
if(inputfile != ""){
QFile file(inputfile);
if(!file.open(QFile::ReadOnly)){
}
QTextStream in(&file);
double buffer;
while(!file.atEnd()){
in.readLine();
for(int i=0; i<512; i++){
in >> buffer;
data::SingleLineData[i]+=buffer;
}
}
}
qDebug() << data::SingleLineData;
// ************* file output **************************************************
QString filename = "/Users/Mitch/Desktop/integral.txt";
QFile fileout(filename);
if (fileout.open(QFile::ReadWrite | QFile::Truncate)){
QTextStream out(&fileout);
for (QVector<double>::iterator iter = data::SingleLineData.begin(); iter != data::SingleLineData.end(); iter++){
out << *iter <<", ";
}
fileout.close();
}
}
void MainWindow::on_pushButton_2_clicked()
{
QString inputfile = QFileDialog::getOpenFileName(
this,
tr("Open File"),
"/Users",
"All files (*.*)"
);
QVector<double> SingleChannel;
if (inputfile != ""){
QFile file(inputfile);
if (!file.open(QIODevice::ReadOnly)){
}
QTextStream in(&file);
SingleChannel.resize(1);
double buffer;
int channelnumber = ui->spinBox->value();
while(!file.atEnd()){
in.readLine();
for (int i = 0; i < 512; i++){
in >> buffer;
if (i == channelnumber){
SingleChannel.push_back(buffer);
}
data::SingleLineData[i]+=buffer;
}
}
}
qDebug() << SingleChannel;
}
我相信,當頭文件中聲明了一個函數,但未在.cpp文件中實現該函數時,就會發生該錯誤。 據我所知,兩個按鈕都在.cpp文件中實現,而這正是編譯器所抱怨的。
有任何想法嗎? 謝謝米奇
編譯器抱怨找不到data::SingleLineData
的定義位置。 它知道已經聲明了它,但是由於它是靜態成員,因此必須在文件范圍內定義它,以便它的內存存在於某個地方並可以鏈接到。 看這里 。
添加QVector<double> data::SingleLineData;
到您的.cpp文件以定義靜態成員。
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.