HI , This post is for those who are new in xcode & Qt....
Suppose your project name is myproj .

1. write all .CPP,.H & .pro file in a folder.
2. write these commands in terminal------
3. cd /myproj
4. qmake -o makefile myproj.pro
5. qmake -spec macx-g++
6. qmake &&make.

after successfull build ...

7. qmake -spec macx-xcode


then your project folder will be having xcode file open it by double clicking...... now you can edit your application in XCODE.