需求: 如何导入子资料夹裡的category档桉在Theos Makefile
大大们上午好，小弟遇到一个资料结构在thoeos build up的问题。因为为了让整份project的资料夹结构更有分类性，所以我将一相同类型的category类得档桉放到子资料夹。其Makefile结构如下：
include $(THEOS)/makefiles/common.mk
ARCHS = armv7 arm64
TARGET = iphone:latest:8.1
THEOS_DEVICE_IP=127.0.0.1
THEOS_DEVICE_PORT=2222
APPLICATION_NAME = TestRobot
TestRobot_FILES = main.m ZRAppDelegate.m ZRRootViewController.m AppsCool.m
TestRobot_FRAMEWORKS = UIKit CoreGraphics
TestRobot_PRIVATE_FRAMEWORKS = MobileInstallation
TestRobot_LIBRARIES = applist
TestRobot_LDFLAGS = -lsqlite3
TestRobot_CODESIGN_FLAGS = -Sentitlements.xml
SUBPROJECTS += StringExtension
include $(THEOS_MAKE_PATH)/application.mk
after-stage::
$(ECHO_NOTHING)chmod +s $(THEOS_STAGING_DIR)/Applications/TestRobot.app/TestRobot$(ECHO_END)
after-install::
install.exec "su mobile -c uicache"
install.exec "killall -9 SpringBoard"
以上我尝试过两种方法，第一种是在TestRobot_FILES中直接写出子资料夹路径下的m档桉，例如StringExtension/NSString+String.m。但结果依然无法呼叫String.m裡面的method。
第二种是我去open source project of theos到处看别人的makefile怎麽写，发现是使用Subproject，然后subproject裡面又有一个makefile。这个第二个makefile我是这样写的：
APPLICATION_NAME = TestRobot
TestRobot_FILES = NSString+String.m
TestRobot_FRAMEWORKS = UIKit CoreGraphics
TestRobot_PRIVATE_FRAMEWORKS = MobileInstallation
TestRobot_LIBRARIES = applist
TestRobot_LDFLAGS = -lsqlite3
TestRobot_CODESIGN_FLAGS = -Sentitlements.xml
include $(THEOS_MAKE_PATH)/application.mk
以上两种方法在make package install都不会报错，但是实际在呼叫这个category的方法却会报错
+[NSString getCopyRightString]: unrecognized selector sent to class 0x1967822a8
还请大大给点提示，什麽样的做法是正确撰写makefile的引用子资料夹底下的.h .m档裡的method。
感谢！