如何让lineedit动态获得用户的输入

Question

test2::test2(QWidget *parent)
: QMainWindow(parent)
{
ui.setupUi(this);
mybutton1=new QPushButton("push this to input messages.",this);
mybutton1->setGeometry(150,200,300,100);

mybutton2=new QPushButton("exit",this);
mybutton2->setGeometry(400,300,100,100);

myedit=new QLineEdit("1",this);
myedit->setGeometry(100,100,300,100);

connect(mybutton2,SIGNAL(clicked()),this,SLOT(close()));
connect(mybutton1,SIGNAL(clicked()),this,SLOT(get_inf()));//获得lineedit输入的信号和槽函数

}

void test2::get_inf()
{
emit return_message();
}

int test2::return_message()
{
temp=0;
s=myedit->text();
temp=s.toInt();
return temp;
}
我本意是想按下获取信息的按钮（mybutton1）再获取信息，但经过试验，我发现获取信息的函数早就在程序一运行就获取了，（例如我一开始在lineedit中写入了数字1）在程序一运行那个1就被获取了，而后续我在运行出来的窗口改数字后，在按button1时，那个并没有被获取，求解答

Answer 1

connect(myedit, SIGNAL(textChanged(QString), this, SLOT(onTextChanged(QString));
test2::onTextChanged(QString text)
{
//获取lineedit文本
}