我试图使用
Swift在整个字母表中循环.唯一的问题是我想为每个字母赋值.
例如：a = 1,b = 2,c = 3,依此类推,直到我得到z = 26.
如何使用用户键入的文本字段中的每个字母,同时使用先前分配给字母表中字母的值？
完成此操作后,如何将所有字母值相加以获得整个单词的总和.我正在寻找最简单的方法来完成这个,但按照我希望的方式工作.
有什么建议么？
提前致谢.
编辑/更新：Xcode 7.2.1•Swift 2.1.1
原文链接：/swift/319534.htmlimport UIKit
class ViewController: UIViewController {
@IBOutlet weak var strWordValue: UILabel!
@IBOutlet weak var strInputField: UITextField!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view,typically from a nib.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
@IBAction func sumLettersAction(sender: AnyObject) {
strWordValue.text = strInputField.text?.wordValue.description
}
}
扩展
extension String {
var letterValue: Int {
return Array("abcdefghijklmnopqrstuvwxyz".characters).indexOf(Character(lowercaseString))?.successor() ?? 0
}
var wordValue: Int {
var result = 0
characters.forEach { result += String($0).letterValue }
return result
}
}
func letterValue(letter: String) -> Int {
return Array("abcdefghijklmnopqrstuvwxyz".characters).indexOf(Character(letter.lowercaseString))?.successor() ?? 0
}
func wordValue(word: String) -> Int {
var result = 0
word.characters.forEach { result += letterValue(String($0)) }
return result
}
let aValue = letterValue("a") // 1
let bValue = letterValue("b") // 2
let cValue = letterValue("c") // 3
let zValue = letterValue("Z") // 26
let busterWordValue = wordValue("Buster") // 85
let busterWordValueString = wordValue("Buster").description // "85"
//
extension Character {
var lowercase: Character { return Character(String(self).lowercaseString) }
var value: Int { return Array("abcdefghijklmnopqrstuvwxyz".characters).indexOf(lowercase)?.successor() ?? 0 }
}
extension String {
var wordValue: Int { return Array(characters).map{ $0.value }.reduce(0){ $0 + $1 } }
}
"Abcde".wordValue // 15
