Undefined symbols for architecture i386:的解决方案

对于错误信息Undefined symbols for architecture i386:的解决方案

其他代码

当拷贝文件到工程里的时候，若不注意勾选"Add to Target"，运行时会报如下类似的错误:
Undefined symbols for architecture i386:

"_OBJC_CLASS_$_SKPSMTPMessage", referenced from:
objc-class-ref in ConfirmController.o

"_kSKPSMTPPartContentTransferEncodingKey", referenced from:
-[ConfirmController sendEmail] in ConfirmController.o

"_kSKPSMTPPartMessageKey", referenced from:
-[ConfirmController sendEmail] in ConfirmController.o

"_kSKPSMTPPartContentTypeKey", referenced from:
-[ConfirmController sendEmail] in ConfirmController.o

ld: symbol(s) not found for architecture i386

解决方法：
先点击方案（左边列表，点击方案的图示）
选择target
选择页签Build Phases
Compile Source
如果没展开的话先展开
向下找加号，点击加号，将这个target需要的.m档案的头文件都加入吧
（如果只有一个 就把左右的.h档案都加入）
这样就应该可以了

描述：类似Undefined symbols for architecture i386: "_OBJC_CLASS_$_SKPSMTPMessage", referenced from: objc-class-ref in ConfirmController.o "_kSKPSMTPPartContentTransferEncodingKey", referenced from: -[ConfirmController sendEmail] in ConfirmController.o
"_kSKPSMTPPartMessageKey", referenced from: -[ConfirmController sendEmail] in ConfirmController.o "_kSKPSMTPPartContentTypeKey", referenced from: -[ConfirmController sendEmail] in ConfirmController.o ld: symbol(s) not found for architecture i386的错误