经典错误：symbol(s) not found for architecture x86_64 || Undefined symbols for architecture x86_64:

记录经典，防止踩坑！！！！！   真机可以运行，模拟器报错。 错误信息显示如下： Ld /Users/lyj/Library/Developer/Xcode/DerivedData/G42PayBucketDemo-gtrplkdamuwrabcpmyhxodgbqlgw/Build/Products/Debug-iphonesimulator/G42PayBucketDemo.app/G42Pa

>>阅读原文<<