问题：
No architectures to compile for (ONLY_ACTIVE_ARCH=YES, active arch=arm64, VALID_ARCHS=armv7 armv7s)
解决：
Project ->Target->Build Setting ->搜索 Build Active Architecture Only ->把值改成NO
No architectures to compile for (ONLY_ACTIVE_ARCH=YES, active arch=arm64, VALID_ARCHS=armv7 armv7s)
原文：http://blog.csdn.net/isharestudio/article/details/31380023
