我试图在Swift中使用元组作为可选绑定的条件语句,但它无法编译,并且错误信息不够明确。为什么以下代码无法编译?
let user:String? = "billy"
let pass:String? = "password"
if let test = (user?,pass?){
print("this works")
}
或者这个
let user:String? = "billy"
let pass:String? = "password"
if let test = (user,pass){
print("this works")
}