编译器无法在合理的时间内对这个表达式进行类型检查。 尝试将表达式分解为不同的子表达式

Question

I am new in Ios programming and the below expressing is giving an error:

let combine = date.enumerated().map {index, date in
 return (date,self.arrFriendId[index],self.arrFriendName[index],self.arrFriendImage[index],self.arrMsgType[index],self.arrMessage[index], self.arrLastMsgTime[index], self.arrNotifyStatus[index])}

please help me to solve this. thanks in advance

Answer 1

This error generally occurs when a single expression is doing a lot of things. So compiler tells you to break it to sub-expressions.

Assuming you want the output combine of type Array<Any> , You can do it like this:

let combine = date.enumerated().map { index, date -> Any in
    let id = self.arrFriendId[index]
    let name = self.arrFriendName[index]
    let image = self.arrFriendImage[index]
    let messageType = self.arrMsgType[index]
    let message = self.arrMessage[index]
    let messageTime = self.arrLastMsgTime[index]
    let status = self.arrNotifyStatus[index]
    return (date, id, name, image, messageType, message, messageTime, status)
}