local package_path = package.path
package.path = string.format("%s?.lua;%s", device.writablePath, package_path)
cc.FileUtils:getInstance():addSearchPath(device.writablePath)
local path = cc.FileUtils:getInstance():getSearchPaths()
dump(path)
device.writablepath为：/Users/xxx/Library/Developer/CoreSimulator/Devices/3AC5E83A-3358-4C65-BDD3-28AEBD25FC1A/data/Containers/Data/Application/B160AEBA-FB05-433E-A3E7-993E01668431/Documents/
但是添加到搜索路径后,获取searchPaths并打印，路径变成了：
/Users/xxx/Library/Developer/CoreSimulator/Devices/3AC5E83A-3358-4C65-BDD3-28AEBD25FC1A/data/Containers/Data/Application/B160AEBA-FB05-433E-A3E7-993E01668431/Documents/debugruntime/，这是为啥？