作业:
设计一个窗口,窗口有2个按钮和1个标签
点击按钮1让标签文字内容在"你好"和"再见"之间切换
点击按钮2让标签文字颜色在红色和蓝色之间切换
//这是.h文件
#ifndef WIDGET_H
#define WIDGET_H
#include <QWidget>
#include <QPushButton>
#include <QLabel>
class Widget : public QWidget
{
Q_OBJECT
public:
Widget(QWidget *parent = nullptr);
~Widget();
private slots:
//
private:
QPushButton *btn;
QPushButton *btn1;
QLabel *lab;
int flag =0;
int flag1 =0;
};
#endif // WIDGET_H
//.cpp文件
#include "widget.h"
#include <QDebug>
Widget::Widget(QWidget *parent)
: QWidget(parent)
{
btn = new QPushButton("点击",this);
btn1 = new QPushButton("点击1",this);
lab = new QLabel("hello",this);
btn->move(300,150);
btn1->move(150,150);
lab->move(100,50);
QObject::connect(btn,&QPushButton::clicked,this,[&](){
if(flag == 0){
lab->setText("hallo");
flag = 1;
}
else if(flag == 1){
lab->setText("buy");
flag = 0;
}
});
QObject::connect(btn1,&QPushButton::clicked,this,[&](){
if(flag1 == 0){
QColor c(0,0,255);//大红
QPalette p;//调色板
p.setColor(QPalette::WindowText/*文本颜色*/,c);
lab->setPalette(p);//设置调色板
flag1 = 1;
}
else if(flag1 == 1){
QColor c(255,0,0);//大红
QPalette p;//调色板
p.setColor(QPalette::WindowText/*文本颜色*/,c);
lab->setPalette(p);//设置调色板
flag1 = 0;
}
});
}
Widget::~Widget()
{
}