编译Swift源文件时，Xcode 6.3不会存档并卡住

Xcode 6.3 gets stuck on "compiling swift source files" when I try to build for archive! it gets stuck on "compiling last two or three swift files". I waited nine hours but did not happen anything. Do you have any ideas for this problem ?Xcode 6.3 gets stuck on "compiling swift source