我是快速的新手,我试了几个小时这个问题.在我的代码下面：
/* [1] error in this line */if filteredCustomReqList != nil {
for i in 0..<filteredCustomReqList?.count {
tempObj = filteredCustomReqList[i] as! [AnyHashable: Any]
bezeichString = tempObj?["bezeich"] as! String
specialRequestLabel.text = ("\(filteredString),\(bezeichString!)")
print (bezeichString!)
}
}
错误说：
binary operator cannot be applied to operands of type int and int?
其中：
var filteredCustomReqList: [Any]? /* = [Any]() */
如果我使用var filteredCustomReqList：[Any] = [Any]()错误消失但我的if条件总是为真.如何解决此问题？我读过this,但与我的情况不一样(它的int和CGFloat).
任何答案和消息都会对我有所帮助.提前致谢
如果要解包filteredCustomReqList可选变量,可以使用Optional Binding.
var filteredCustomReqList: [Any]?
if let filteredCustomReqList = filteredCustomReqList {
for i in 0..<filteredCustomReqList.count {
tempObj = filteredCustomReqList[i] as! [AnyHashable: Any]
bezeichString = tempObj?["bezeich"] as! String
specialRequestLabel.text = ("\(filteredString),\(bezeichString!)")
print (bezeichString!)
}
}
