qt中获取打开文件路径，颜色对话框，字体对话框，自定义对话框，消息对话框，输入对话框

1.获取打开文件的文件路径

//获取打开文件的文件路径--父窗口，窗口名称，打开路径，文件筛选
QString s = QFileDialog::getOpenFileName(this,"open file dialog","/","C++ files(*.cpp)::C files(*.c)::Head files(*.h)");

2.打开颜色管理器，获取选中的颜色

//打开颜色管理器，获取选中的颜色，并改变QFrame的颜色为选中的颜色
QColor c = QColorDialog::getColor(Qt::blue);
if(c.isValid())
{
    QFrame *frame=new QFrame;
    frame->setFrameShape(QFrame::Box);
    frame->setAutoFillBackground(true);
	frame->setPalette(QPalette(c));
}

3.打开字体设置对话框，返回设置的字体

//打开字体设置对话框，返回设置的字体
bool ok;
QFont f = QFontDialog::getFont(&ok);
if (ok)
{
	//lineEdit->setFont(f);
}

4.用户自定义对话框

//用户自定义对话框，并返回用户点击的按钮
QMessageBox customMsgBox;
customMsgBox.setWindowTitle(tr("用户自定义消息框"));

QPushButton *yesBtn=customMsgBox.addButton(tr("Yes"),QMessageBox::ActionRole);
QPushButton *noBtn=customMsgBox.addButton(tr("No"),QMessageBox::ActionRole);
QPushButton *cancelBtn=customMsgBox.addButton(QMessageBox::Cancel);

customMsgBox.setText(tr("这是一个用户自定义消息框!"));
customMsgBox.setIconPixmap(QPixmap("Qt.png"));
customMsgBox.exec();

if(customMsgBox.clickedButton()==yesBtn)
	return 1;
if(customMsgBox.clickedButton()==noBtn)
	return 0;
if(customMsgBox.clickedButton()==cancelBtn)
	return 2;
return;

5.标准消息对话框

//1.QuestionMessageBox
int tempnum = 1;
switch(QMessageBox::question(this,tr("Question框"),
	  tr("修改完成，是否要结束程序？"),
	  QMessageBox::Ok|QMessageBox::Cancel,QMessageBox::Ok))
{
case QMessageBox::Ok:
	tempnum = 1;
	break;
case QMessageBox::Cancel:
	tempnum = 0;
	break;
default:
	break;
}
return tempnum;

//2.informationMessageBox
QMessageBox::information(this,tr("Information框"),tr("这是Information框"));

//3.warningMessageBox
int tempnum = 1;
switch(QMessageBox::warning(this,tr("Warning框"),
	 tr("您修改的内容还未保存，是否要保存？"),
	 QMessageBox::Save|QMessageBox::Discard|QMessageBox::Cancel,
	 QMessageBox::Save))
{
case QMessageBox::Save:
	tempnum = 1;
	break;
case QMessageBox::Discard:
	tempnum = 2;
	break;
case QMessageBox::Cancel:
	tempnum = 0;
	break;
default:
	break;
}
return tempnum;

//4.criticalMessageBox--错误消息框
QMessageBox::critical(this,tr("Critical消息框"),tr("Critical框测试！"));

//5.aboutMessageBox
QMessageBox::about(this,tr("About消息框"),tr("About框测试！"));

6.标准输入对话框

//1.字符串
bool ok;
QString text=QInputDialog::getText(this,tr("标准输入对话框"),tr("请输入XXXX："), QLineEdit::Normal,"默认内容",&ok);
if (ok && !text.isEmpty())
	return text;

//2.下拉框
QStringList SexItems;
SexItems << tr("男") << tr("女");

bool ok;
QString SexItem = QInputDialog::getItem(this, tr("标准条目选择对话框"),
  tr("请选择性别："), SexItems, 0, false, &ok);
if (ok && !SexItem.isEmpty())
	return SexItem;

//3.int型
bool ok;
int age = QInputDialog::getInt(this, tr("标准int类型输入对话框"),
 tr("请输入年龄："), ageLabel2->text().toInt(&ok), 0, 100, 1, &ok);
if (ok)
	ageLabel2->setText(QString(tr("%1")).arg(age));

//4.double型
bool ok;
double score = QInputDialog::getDouble(this, tr("标准double类型输入对话框"),
 tr("请输入成绩："),scoreLabel2->text().toDouble(&ok), 0, 100, 1, &ok);
if(ok)
	scoreLabel2->setText(QString(tr("%1")).arg(score));