添加设计模式及例子，包括：单例、抽象工厂、适配器、桥接、观察者模式

DesignPattern/SingletonPattern/SingletonMain.h

@@ -0,0 +1,15 @@
+//
+// Created by xiemenghui on 2018/7/20.
+//
+
+#ifndef DESIGNPATTERN_SINGLETONMAIN_H
+#define DESIGNPATTERN_SINGLETONMAIN_H
+
+#include "Singleton.h"
+
+void SingletonMain()
+{
+    Singleton::GetInstance().DoSomething();
+}
+
+#endif //DESIGNPATTERN_SINGLETONMAIN_H