更新代码

other/multobj2slot/main.cpp

@@ -0,0 +1,31 @@
+#pragma execution_character_set("utf-8")
+
+#include "widget.h"
+#include <QApplication>
+#include <QTextCodec>
+
+int main(int argc, char *argv[])
+{
+    QApplication a(argc, argv);
+    a.setFont(QFont("Microsoft Yahei", 9));
+
+#if (QT_VERSION <= QT_VERSION_CHECK(5,0,0))
+#if _MSC_VER
+    QTextCodec *codec = QTextCodec::codecForName("gbk");
+#else
+    QTextCodec *codec = QTextCodec::codecForName("utf-8");
+#endif
+    QTextCodec::setCodecForLocale(codec);
+    QTextCodec::setCodecForCStrings(codec);
+    QTextCodec::setCodecForTr(codec);
+#else
+    QTextCodec *codec = QTextCodec::codecForName("utf-8");
+    QTextCodec::setCodecForLocale(codec);
+#endif
+
+    Widget w;
+    w.setWindowTitle("多对象共用槽 (QQ: 517216493 WX: feiyangqingyun)");
+    w.show();
+
+    return a.exec();
+}

other/multobj2slot/multobj2slot.pro

@@ -0,0 +1,13 @@
+QT += core gui
+greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
+greaterThan(QT_MAJOR_VERSION, 5): QT += core5compat
+
+TARGET      = mouseline
+TEMPLATE    = app
+DESTDIR     = $$PWD/../bin
+CONFIG      += warn_off
+
+SOURCES     += main.cpp
+SOURCES     += widget.cpp
+HEADERS     += widget.h
+FORMS       += widget.ui

other/multobj2slot/widget.cpp

@@ -0,0 +1,70 @@
+#include "widget.h"
+#include "ui_widget.h"
+#include "qpushbutton.h"
+#include "qsignalmapper.h"
+#include "qdatetime.h"
+#include "qdebug.h"
+
+#define TIMEMS QTime::currentTime().toString("hh:mm:ss zzz")
+Widget::Widget(QWidget *parent) : QWidget(parent), ui(new Ui::Widget)
+{
+    ui->setupUi(this);
+    this->initBtn();
+}
+
+Widget::~Widget()
+{
+    delete ui;
+}
+
+void Widget::initBtn()
+{
+    QSignalMapper *signMap = new QSignalMapper(this);
+    connect(signMap, SIGNAL(mapped(QString)), this, SLOT(doBtn(QString)));
+
+    int x = 5, y = -25;
+    for (int i = 0; i < 1000; ++i) {
+        //动态设置坐标
+        x += 80;
+        if (i % 10 == 0) {
+            x = 5;
+            y += 30;
+        }
+
+        QPushButton *btn = new QPushButton(this);
+        btn->setObjectName(QString("btn_%1").arg(i + 1));
+        btn->setText(QString("text_%1").arg(i + 1));
+        btn->setGeometry(x, y, 75, 25);
+
+        //方法0: 每个按钮关联到一个独立的槽,代码量大不可取放弃
+        //方式1: 绑定到一个槽函数
+        connect(btn, SIGNAL(clicked(bool)), this, SLOT(doBtn()));
+        //方式2: 通过 QSignalMapper 转发信号
+        connect(btn, SIGNAL(clicked(bool)), signMap, SLOT(map()));
+        signMap->setMapping(btn, btn->objectName());
+        //方法3: 用 lambda 表达式
+#if (QT_VERSION >= QT_VERSION_CHECK(5,6,0))
+        connect(btn, &QPushButton::clicked, [btn] {
+            QString name = btn->objectName();
+            qDebug() << TIMEMS << "doBtn3" << name;
+        });
+
+        connect(btn, &QPushButton::clicked, [=]() {
+            QString name = btn->objectName();
+            qDebug() << TIMEMS << "doBtn3" << name;
+        });
+#endif
+    }
+}
+
+void Widget::doBtn()
+{
+    QPushButton *btn = (QPushButton *)sender();
+    QString name = btn->objectName();
+    qDebug() << TIMEMS << "doBtn1" << name;
+}
+
+void Widget::doBtn(const QString &name)
+{
+    qDebug() << TIMEMS << "doBtn2" << name;
+}

other/multobj2slot/widget.h

@@ -0,0 +1,27 @@
+#ifndef WIDGET_H
+#define WIDGET_H
+
+#include <QWidget>
+
+namespace Ui {
+class Widget;
+}
+
+class Widget : public QWidget
+{
+    Q_OBJECT
+
+public:
+    explicit Widget(QWidget *parent = 0);
+    ~Widget();
+
+private:
+    Ui::Widget *ui;
+
+private slots:
+    void initBtn();
+    void doBtn();
+    void doBtn(const QString &name);
+};
+
+#endif // WIDGET_H

other/multobj2slot/widget.ui

@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>Widget</class>
+ <widget class="QWidget" name="Widget">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>800</width>
+    <height>600</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string/>
+  </property>
+ </widget>
+ <layoutdefault spacing="6" margin="11"/>
+ <resources/>
+ <connections/>
+</ui>