QT窗口API函数geometry（）用于获取窗口在屏幕上的几何位置和大小QRectgeo=widget->geometry();intx=geo.x();//窗口左上角的x坐标inty=geo.y();//窗口左上角的y坐标intw=geo.width();//窗口的宽度inth=geo.height();//窗口的高度width()函数返

    #include"dialog.h"#include"ui_dialog.h"Dialog::Dialog(QWidget*parent):QDialog(parent),ui(newUi::Dialog){ui->setupUi(this);resize(320,150);glayout=newQGridLayout(this);dispLabel

 private:QGridLayout*glayout;QPushButton*inputStudentNoButton;QLineEdit*inputStudentNoButtonLine;QPushButton*inputStudentNameButton;QLineEdit*inputStudentNameButtonLine;QPushButton*inputStudentSexButton;QLine

 #ifndefDIALOG_H#defineDIALOG_H#include<QDialog>#include<QPushButton>#include<QLineEdit>#include<QFontDialog>#include<QGridLayout>classDialog:publicQDialog{Q_OBJECTpublic:Dialog(QWidget*parent

QFileDialog类（文件对话框） #ifndefDIALOG_H#defineDIALOG_H#include<QDialog>#include<QLabel>#include<QLineEdit>#include<QPushButton>#include<QHBoxLayout>//水平布局#include<QVBoxLayout>//垂直布局#include<QFile