modify：回车默认ok

numkeydia.cpp

@@ -2,6 +2,7 @@
 #include "ui_numkeydia.h"
 #include <QDebug>
 #include <QFile>
+#include <QKeyEvent>
 #include <QMouseEvent>
 #include <QPushButton>
 #include <QShortcut>
@@ -114,10 +115,23 @@ NumKeyDia::NumKeyDia(QWidget *parent)
     for (auto *btn : btnList) {
         connect(btn, &QPushButton::clicked, this, &NumKeyDia::btn_input_clicked);
         btn->setFocusPolicy(Qt::NoFocus);
+        // 数字和符号按钮只负责屏幕点按输入，不参与对话框默认确认键竞争。
+        btn->setAutoDefault(false);
+        btn->setDefault(false);
     }
 
-    auto *okShortcut = new QShortcut(QKeySequence(Qt::Key_Return), this);
-    connect(okShortcut, &QShortcut::activated, this, &NumKeyDia::on_btn_ok_clicked);
+    // 物理键盘 Enter 应默认完成输入；其余操作按钮关闭 autoDefault，
+    // 避免 Qt 把确认键派发到退格/清空等最近获得焦点的按钮。
+    d->ui->btn_ok->setAutoDefault(true);
+    d->ui->btn_ok->setDefault(true);
+    d->ui->btn_back->setAutoDefault(false);
+    d->ui->btn_clear->setAutoDefault(false);
+    d->ui->btn_cancel->setAutoDefault(false);
+
+    auto *okReturnShortcut = new QShortcut(QKeySequence(Qt::Key_Return), this);
+    connect(okReturnShortcut, &QShortcut::activated, this, &NumKeyDia::on_btn_ok_clicked);
+    auto *okEnterShortcut = new QShortcut(QKeySequence(Qt::Key_Enter), this);
+    connect(okEnterShortcut, &QShortcut::activated, this, &NumKeyDia::on_btn_ok_clicked);
 
     d->ui->toolButton_ico->installEventFilter(this);
     d->ui->label_appInfo->installEventFilter(this);
@@ -151,6 +165,17 @@ bool NumKeyDia::eventFilter(QObject *, QEvent *event) {
     return false;
 }
 
+// 数字键盘物理确认键入口：直接收口到 OK，避免 QLineEdit 或按钮默认行为把 Enter 解释成其它操作。
+void NumKeyDia::keyPressEvent(QKeyEvent *event) {
+    if (event && (event->key() == Qt::Key_Return || event->key() == Qt::Key_Enter)) {
+        on_btn_ok_clicked();
+        event->accept();
+        return;
+    }
+
+    QDialog::keyPressEvent(event);
+}
+
 void NumKeyDia::setValue(const QString &value) {
     Q_D(NumKeyDia);
     d->value = value;

numkeydia.h

@@ -28,6 +28,8 @@ public:
 
 protected:
     bool eventFilter(QObject *obj, QEvent *event) override;
+    // 统一处理物理键盘确认键，保证主键盘 Enter 和小键盘 Enter 都等价于点击 OK。
+    void keyPressEvent(QKeyEvent *event) override;
 
 private slots:
     void on_btn_ok_clicked();