这个问题是在导入第三方库时候遇见的，
ld: warning: ignoring file /Users/MrLi/Desktop/CSdemo/CSdemo/jcore-ios-1.1.3.a, missing required architecture i386 in file /Users/MrLi/Desktop/CSdemo/CSdemo/jcore-ios-1.1.3.a (4 slices)
ld: warning: ignoring file /Users/MrLi/Desktop/CSdemo/CSdemo/jpush-ios-3.0.5.a, missing required architecture i386 in file /Users/MrLi/Desktop/CSdemo/CSdemo/jpush-ios-3.0.5.a (4 slices)
Undefined symbols for architecture i386:
"_OBJC_CLASS_$_JPUSHService", referenced from:
objc-class-ref in AppDelegate.o
"_OBJC_CLASS_$_JPUSHRegisterEntity", referenced from:
objc-class-ref in AppDelegate.o
ld: symbol(s) not found for architecture i386
clang: error: linker command failed with exit code 1 (use -v to see invocation)
解决问题：
