Unity generated xcode Integration with Native Xcode Project

Hi,
Can anyone tell me that " is it possible to merge an existing xcode Project within UnityGenerated Xcode Project"
Thanks in advance

1413727–74105–$roof.zip (15.8 KB)
1413727–100637–$cubernd.unitypackage (240 KB)

1652210–103152–inspectorGUItesting.unitypackage (38.8 KB)