Qt - QTimer更新ui

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使用QTimer更新UI ，还是在UI主线程做更新

重点以红色字体标示

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

//mainwindow.h#ifndef MAINWINDOW_H#define MAINWINDOW_H#include <QMainWindow>#include <QTimer>namespace Ui {class MainWindow;}class MainWindow : public QMainWindow{    Q_OBJECTpublic:    explicit MainWindow(QWidget *parent = 0);    ~MainWindow();private:    Ui::MainWindow *ui;    QTimer *timer;    int counter;private slots:    void buttonClicked();    void updateUI();};#endif // MAINWINDOW_H

//mainwindow.cpp#include "mainwindow.h"#include "ui_mainwindow.h"MainWindow::MainWindow(QWidget *parent) :    QMainWindow(parent),    ui(new Ui::MainWindow){    ui->setupUi(this);    timer = new QTimer(this);    timer->setInterval(0.01);    counter = 0;    connect(ui->pushButton,SIGNAL(clicked()),this,SLOT(buttonClicked()));    connect(timer,SIGNAL(timeout()),this,SLOT(updateUI()));    timer->start();}MainWindow::~MainWindow(){    delete ui;}void MainWindow::buttonClicked(){}void MainWindow::updateUI(){    QString str = QString::number(counter++);    ui->textEdit->append("update!" + str);}

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