自定义槽 No such slot
诸位好。最近在做qt，自定义槽的时候，出现如下错误。先把代码贴出了，请各位老师，过目。

头文件：mainwindow.h

C/C++ code

    #ifndef MAINWINDOW_H#define MAINWINDOW_H#include <QMainWindow>#include <QtGui/QLineEdit>namespace Ui {    class MainWindow;}class MainWindow : public QMainWindow{     Q_OBJECTpublic:    explicit MainWindow(QWidget *parent = 0);    ~MainWindow();private:    Ui::MainWindow *ui;    QVector<QLineEdit*> lines;    QStringList   paths;public slots:    void upload2Ftp();    void inputFinish(QString,int);  };#endif // MAINWINDOW_H

源文件：mainwindow.cpp

C/C++ code

#include "mainwindow.h"#include "ui_mainwindow.h"#include <QDebug>#include <QObject>MainWindow::MainWindow(QWidget *parent) :    QMainWindow(parent),    ui(new Ui::MainWindow) {    ui->setupUi(this);    lines.append(ui->lineEdit_0);    lines.append(ui->lineEdit_1);    lines.append(ui->lineEdit_2);    lines.append(ui->lineEdit_3);    lines.append(ui->lineEdit_4);    ui->progressBar->setRange(0,100);    ui->progressBar->setValue(0);    for(int i=0;i<lines.size();i++){       QLineEdit* edit = lines.at(i);       connect(edit,SIGNAL(editingFinished()),this->centralWidget(),SLOT(this->inputFinish(edit->text(),i)));    }      connect(ui->pushButton_0,SIGNAL(clicked()),this->centralWidget(),SLOT(this->upload2Ftp()));}MainWindow::~MainWindow() {    delete ui;}void MainWindow::inputFinish(QString path,int index) {    paths.replace(index,path);}void MainWindow::upload2Ftp(){    for(int i=0;i<lines.size();i++){        qDebug()<<paths.at(i);    }}

main.cpp文件

C/C++ code

#include <QtGui/QApplication>#include "mainwindow.h"#include <QtGui/QPushButton>#include <QtGui/QLineEdit>int main(int argc, char *argv[]) {    QApplication a(argc, argv);    MainWindow w;    w.show();    return a.exec();}

运行能出现界面，但是提示如下信息：
D:\ifnp\ftpGui\ftpGui-build-desktop\debug\ftpGui.exe 启动中...
Object::connect: No such slot QWidget::this->inputFinish(edit->text(),i) in ..\ftpGui\mainwindow.cpp:23
Object::connect: (sender name: 'lineEdit_0')
Object::connect: (receiver name: 'centralWidget')
Object::connect: No such slot QWidget::this->inputFinish(edit->text(),i) in ..\ftpGui\mainwindow.cpp:23
Object::connect: (sender name: 'lineEdit_1')
Object::connect: (receiver name: 'centralWidget')
Object::connect: No such slot QWidget::this->inputFinish(edit->text(),i) in ..\ftpGui\mainwindow.cpp:23
Object::connect: (sender name: 'lineEdit_2')
Object::connect: (receiver name: 'centralWidget')
Object::connect: No such slot QWidget::this->inputFinish(edit->text(),i) in ..\ftpGui\mainwindow.cpp:23
Object::connect: (sender name: 'lineEdit_3')
Object::connect: (receiver name: 'centralWidget')
Object::connect: No such slot QWidget::this->inputFinish(edit->text(),i) in ..\ftpGui\mainwindow.cpp:23
Object::connect: (sender name: 'lineEdit_4')


请诸位老师，错在哪里？

[解决办法]
必然出错！！！
你没有理解好this
connect(edit,SIGNAL(editingFinished()),this,SLOT(this->inputFinish(edit->text(),i)));

你的槽函数是定义在MainWindow 这个类中，所以接受者应该是this

而且我没有看错的话，你写的是centralWidget()，是个函数啊这个函数我在MainWindow 里面也没有找到，这么写有点莫名其妙，接受者不可以是函数
------解决方案--------------------

老湿……直译过来就是 没有相关槽函数的定义， this->centralWidget()这个返回的是QMainWindow的中间Widget，没看到LZ setCentralWidget ( QWidget * widget )？LZ应该把各个信号的接受者连起来 而不是QMainWindow的CentralWidget；

C/C++ code

   for(int i=0;i<lines.size();i++){       QLineEdit* edit = lines.at(i);       connect(edit,SIGNAL(editingFinished()), [color=#FF0000]edit[/color] ,SLOT(this->inputFinish(edit->text(),i)));    }
[解决办法]
void QLineEdit::textChanged ( const QString & text ) [signal]
问题在于，你写的信号，QLineEdit里没有，只有上面的那个，区别是有一个参数。