modify:优化

NumKeyBoard_global.h

@@ -3,10 +3,16 @@
 
 #include <QtCore/qglobal.h>
 
-#if defined(NUMKEYBOARD_LIBRARY)
-#define NUMKEYBOARD_EXPORT Q_DECL_EXPORT
+// 如果定义了 NUMKEYBOARD_STATIC，则宏为空（适用于直接引入源码编译）
+#if defined(NUMKEYBOARD_STATIC)
+#  define NUMKEYBOARD_EXPORT
 #else
-#define NUMKEYBOARD_EXPORT Q_DECL_IMPORT
+// 如果没定义 STATIC，则在“写库”和“用库”之间切换
+#  if defined(NUMKEYBOARD_LIBRARY)
+#    define NUMKEYBOARD_EXPORT Q_DECL_EXPORT
+#  else
+#    define NUMKEYBOARD_EXPORT Q_DECL_IMPORT
+#  endif
 #endif
 
 #endif // NUMKEYBOARD_GLOBAL_H