相关疑难解决方法(0)

我已导入框架,用于从后台应用程序发送电子邮件,即SKPSMTPMessageFramework.有人可以建议为什么会出现以下错误

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
collect2: ld returned 1 exit status

采取框架的来源: -

锁定MFMailComposeViewController中的字段

更新:

答:只需将文件夹拖放到项目上,然后单击复制即可.多数民众赞成也选择项目复选框和目标复选框.