QT Creator错误

Question

你好，我有QT的构建错误，我想知道是否有人知道它为什么会犯这些错误。谢谢

main.cpp:

#include <QApplication>
#include <QGraphicsScene>
#include <QGraphicsRectItem>
#include <QGraphicsView>


int main(int argc, char *argv[]){

    QApplication a(argc, argv);

    //Create Scene
    QGraphicsScene * scene = new QGraphicsScene();

    //Creat Item To Put Into Scene
    QGraphicsRectItem * rect = new QGraphicsRectItem();
    rect->setRect(100, 50, 100, 100);

    //Add Item To Scene aka buffer
    scene->addItem(rect);

    //add a view
    QGraphicsView * view = new QGraphicsView(scene);
    view->show();

    return a.exec();
}

mygame.pro:

#-------------------------------------------------
#
# Project created by QtCreator 2017-05-03T12:14:31
#
#-------------------------------------------------

QT       += core gui

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

TARGET = mygame
TEMPLATE = app

# The following define makes your compiler emit warnings if you use
# any feature of Qt which as been marked as deprecated (the exact warnings
# depend on your compiler). Please consult the documentation of the
# deprecated API in order to know how to port your code away from it.
DEFINES += QT_DEPRECATED_WARNINGS

# You can also make your code fail to compile if you use deprecated APIs.
# In order to do so, uncomment the following line.
# You can also select to disable deprecated APIs only up to a certain version of Qt.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0


SOURCES += main.cpp

HEADERS  +=

编译输出：

Error while building/deploying project mygame (kit: Desktop Qt 5.8.0 MSVC2015_64bit)
When executing step "qmake"

我不知道是什么造成了这些错误(单词和更多的文字更详细，所以“看起来你的帖子需要更多的细节”将消失……它不会消失，所以我将继续打字，直到它选择这样做，但看起来它不会马上去。就这样吧)。

Answer 1

查看编译输出选项卡。如果需要，还可以在命令提示符上运行qmake。

另一种修复奇怪的qmake错误的有用方法是在Qt中获得一个新的项目设置。

关闭Qt，删除.pro.user文件，并使用项目重新打开Qt。这将迫使您重新配置您的Qt版本的调试/发布等项目。

希望这能有所帮助。