【1】.cpp文件

1 #include "widget.h" 2 #include "ui_widget.h" 3 #include 
     
       4  5 Widget::Widget(QWidget *parent) : 6     QWidget(parent), 7     ui(new Ui::Widget) 8 { 9     ui->setupUi(this);10     connect(ui->lineEdit, &QLineEdit::textChanged, this, &Widget::onGetMd5);11 12     setWindowTitle("Md5");13     setFixedSize(350, 80);14 }15 16 Widget::~Widget()17 {18     delete ui;19 }20 21 void Widget::onGetMd5()22 {23     QString strText = ui->lineEdit->text();24     if (strText.isEmpty())25     {26         ui->label->clear();27         return;28     }29 30     QByteArray byteText = strText.toUtf8(); //原方式：toLatin1();为了支持中文：toUtf8()31     QString strPwdMd5 = QCryptographicHash::hash(byteText, QCryptographicHash::Md5).toHex();32     ui->label->setText(strPwdMd5);33 }
     

【2】.h文件

1 #ifndef WIDGET_H 2 #define WIDGET_H 3  4 #include 
     
       5  6 namespace Ui { 7 class Widget; 8 } 9 10 class Widget : public QWidget11 {12     Q_OBJECT13 14 public:15     explicit Widget(QWidget *parent = 0);16     ~Widget();17 18 private slots:19     void onGetMd5();20 21 private:22     Ui::Widget *ui;23 };24 25 #endif // WIDGET_H
     

【3】效果图

如上所述，不做赘述。

 

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