上一篇文章中描述了按钮的纯色，本文描述标签的渐变色美化。
1.头文件
#ifndef WIDGET_H
#define WIDGET_H
#include <QWidget>
//#include "CustomButton.h"
#include <QVBoxLayout>
#include <QLinearGradient>
#include <QLabel>
#include <QTimer>
QT_BEGIN_NAMESPACE
namespace Ui {
class Widget;
}
QT_END_NAMESPACE
class Widget : public QWidget
{
Q_OBJECT
public:
Widget(QWidget *parent = nullptr);
~Widget();
void initUI();
private:
Ui::Widget *ui;
// CustomButton *button;
// QPushButton *button2;
QLabel *label;
QTimer *timer;
int counter=0;//计时器
};
2.cpp文件
#include "widget.h"
#include "ui_widget.h"
Widget::Widget(QWidget *parent)
: QWidget(parent)
, ui(new Ui::Widget)
{
ui->setupUi(this);
initUI();
}
Widget::~Widget()
{
delete ui;
}
void Widget::initUI()
{
QVBoxLayout * mainlayout = new QVBoxLayout(this);//指定布局属于啥组件
QLabel *label=new QLabel(this);
timer=new QTimer(this);
timer->start(1000);//定时1秒
QObject::connect(timer, &QTimer::timeout,
**label,this**\]()//lambda函数 { **counter++** ; if(**1==counter%2** ) //qDebug("pressed!"); { label-\>setStyleSheet(" border-radius: 15px;" "border: 2px solid rgb(100, 120, 100); " "**background-color: qlineargradient**(x1: 0, y1: 0," " x2: 1, y2: 1, " "**stop**: 0 #ffffff," "**stop**: 0.3 #bbeebb," "**stop**: 1 #4f4f4f);" );//暗 } else { label-\>setStyleSheet(" border-radius: 15px;" "border: 2px solid rgb(100, 120, 100); " "**background-color: qlineargradient**(x1: 0, y1: 0, x2: 1, y2: 1, " "**stop**: 0 #ffffff," "**stop**: 0.3 #43ff43," "**stop**: 1 #669066);" );//亮绿色 } }); **label-\>setFixedWidth(30); label-\>setFixedHeight(30);** mainlayout-\>addWidget(label);//指定布局包含啥组件 this-\>setLayout(mainlayout); } //效果：  