add new (Macro) debug description implementation for debugger. (#675)

Author: wolfcon

MJExtension/MJExtensionConst.h

@@ -83,6 +83,13 @@ MJExtensionAssert2((param) != nil, returnValue)
 }
 #define MJExtensionLogAllProperties MJLogAllIvars
 
+/** 仅在 Debugger 展示所有的属性 */
+#define MJImplementDebugDescription \
+-(NSString *)debugDescription \
+{ \
+return [self mj_keyValues].debugDescription; \
+}
+
 /**
  *  类型（属性类型）
  */