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最近在做一個項目，需要把客戶端界面的顏色改變成為客戶需要的顏色，但蓋起來相當(dāng)麻煩，于是就想到QColorDialog來拾取顏色，動態(tài)的改變界面的顏色，但是這種方法只適用客戶端開始設(shè)計的時候就隨之引入。下面是代碼：

Widget.h

#ifndef WIDGET_H#define WIDGET_H#include <QWidget>#include <QColorDialog>namespace Ui {class Widget;}class Widget : public QWidget{    Q_OBJECTpublic:    explicit Widget(QWidget *parent = 0);    ~Widget();private slots:    void ShowColor(QColor);    void SetColor(QColor);    void SetColor_1();    void on_pushButton_clicked();private:    Ui::Widget *ui;    QColor m_color;//記錄界面初始顏色    QColor m_selectedColor;//記錄按OK鍵后選中的顏色};#endif // WIDGET_H

Widget.cpp

#include "widget.h"#include "ui_widget.h"#include <QPalette>#include <QDebug>Widget::Widget(QWidget *parent) :    QWidget(parent),    ui(new Ui::Widget){    ui->setupUi(this);    //獲取當(dāng)前窗口的背景色    QPalette p = this->palette();    QBrush brush = p.background();    m_color = brush.color();}Widget::~Widget(){    delete ui;}void Widget::ShowColor(QColor color){    QPalette palette;    palette = this->palette();    palette.setBrush(QPalette::Window,QBrush(color));    this->setAutoFillBackground(true);    this->setPalette(palette);}void Widget::SetColor(QColor color){    if(color.isValid())    {        qDebug()<<"SetColor";        QPalette palette;        palette = this->palette();        palette.setBrush(QPalette::Window,QBrush(color));        this->setAutoFillBackground(true);        this->setPalette(palette);        m_selectedColor = color;    }}void Widget::SetColor_1(){    if(m_selectedColor.isValid())    {        qDebug()<<"SetColor_1";        QPalette palette;        palette = this->palette();        palette.setBrush(QPalette::Window,QBrush(m_selectedColor));        this->setAutoFillBackground(true);        this->setPalette(palette);        m_color = m_selectedColor;    }    else    {        qDebug()<<"SetColor_2";        QPalette palette;        palette = this->palette();        palette.setBrush(QPalette::Window,QBrush(m_color));        this->setAutoFillBackground(true);        this->setPalette(palette);    }}void Widget::on_pushButton_clicked(){    QColorDialog *m_pColor = new QColorDialog(this);    m_pColor->setCurrentColor(m_color);    m_pColor->show();    connect(m_pColor,SIGNAL(currentColorChanged(QColor)),this,SLOT(ShowColor(QColor)));//顯示當(dāng)前選中顏色的效果    connect(m_pColor,SIGNAL(colorSelected(QColor)),this,SLOT(SetColor(QColor)));//OK信號連接    //rejected信號會在QColorDialog框關(guān)閉或按Cancel按鈕時發(fā)出，可通過綁定該信號來進(jìn)行Cancel信號過濾    connect(m_pColor,SIGNAL(rejected()),this,SLOT(SetColor_1()));}

效果如下