add: spdlog and basic client code.

ClientCore/ClientCore.cpp

@@ -0,0 +1,30 @@
+#include "ClientCore.h"
+
+#include <QDebug>
+
+ClientCore::ClientCore(QObject* parent) : QObject(parent)
+{
+}
+
+ClientCore::~ClientCore()
+{
+}
+
+bool ClientCore::Connect(const QString& ip, quint16 port)
+{
+    QMutexLocker locker(&conMutex_);
+    if (!locker.isLocked()) {
+        qWarning() << QString(tr("%1:%2 already connecting...")).arg(ip).arg(port);
+        return false;
+    }
+    socket_->connectToHost(ip, port);
+    if (!socket_->waitForConnected(3000)) {
+        qCritical() << QString(tr("%1:%2 connect failed...")).arg(ip).arg(port);
+        return false;
+    }
+    return true;
+}
+
+void ClientCore::Disconnect()
+{
+}