Swift 2 IOS 9 = clang: error: linker命令退出码1失败(使用-v查看调用)

Hi, I've a problem regarding Parse. today is my first day using it, started out with 4 errors now it's only one left. I have a hard time understanding objective C with swift, started 3 days ago. While trying to understand this line of error and what makes this error appear? Is it a bug that has to be forced through or is it something that I'm missing? Hi, I've a problem regarding Parse. today is