自壬揖Α：
extension String{
func ChineseToNum()->String{
guard characters.count > 0 else { return "" }
guard (["百","千","萬","千萬"].filter{ $0 == self }.count == 0) else { return "" }
let numString = ["零","一","二","三","四","五","六","七","八","九"]
let handle = { (resource:String) -> String in
switch resource {
case "十":return "0"
case "百":return "00"
case "千":return "000"
case "萬":return "0000"
default :return ""
}
}
let loop = { (resource:String,isSpecial:Bool) -> String in
return resource.characters.enumerated().reduce(""){
let temp = "\(numString.index(of: String($1.element)) ?? -1)"
let placeholder = isSpecial ? handle(String($1.element)) : ""
return $0 + (temp == "-1" ? placeholder : temp)
}
}
let normal = { (resource:String) -> String in
let result = loop(resource,false) + handle(String(describing: resource.characters.last))
return resource.characters.count == 2 && String(resource.characters[resource.startIndex]) == "十" ? "1" + result : result
}
if contains("零"){
let intermediate = components(separatedBy: "零")
return "\((Int(loop(intermediate[0],true)) ?? 0) + (Int(normal(intermediate[1])) ?? 0))"
}
else{
return normal(self)
}
}
}
