Can someone give me a simple qt example? - qt

Question

I want to implement a simple QT example: click the QPushButton to display a paragraph of text.
Like this:
I know there are many ways to implement it, but I don't know what's wrong with my code.
QPushButton *btn = new QPushButton;
//btn->show();
btn->setParent(this);
btn->setText("button 1");
QLabel *la = new QLabel(this);
connect(btn,&QPushButton::clicked,la,&QLabel::setText("show me"));
Anyone who can help me？

Answer 1

The idea is to create the QLabel with a predefined text and hide it. On clicking the button, show it. So, QLabel::hide and QLabel::show could be used here. Just take care of the coordinates where you show the label because it would overlap the button itself without layout or proper coordinates.
Example (mainwindow.cpp, constructor):
#include "mainwindow.h"
#include "ui_mainwindow.h"
MainWindow::MainWindow(QWidget *parent)
: QMainWindow(parent)
, ui(new Ui::MainWindow)
{
ui->setupUi(this);
setWindowTitle("My App"); // title bar text
QPushButton *btn = new QPushButton(this);
btn->setText("Click Me!");
QLabel *la = new QLabel(this);
la->setText("Show Me!"); // set label text in advance
la->move(100, 100); // set label position
la->hide(); // hide label on load
connect(btn, &QPushButton::clicked, la, &QLabel::show);
}
MainWindow::~MainWindow()
{
delete ui;
}
Output (after clicking the image):