ios - 如何将整个句子中的某个单词定义为变量？

Question

我希望名称(条目中的名称)成为名为 enteredName 的变量的分配值。

func textFieldShouldReturn(_ textField: UITextField) -> Bool {
    textField.resignFirstResponder()
    performAction()
    return (true)
}

func performAction() {      
    if let entry = textField.text {
        if entry == "my name is" + //a name {
            var enteredName = //the name
            print ("Your name is " + enteredName + " .")

        }
    }
}

我该怎么做？

Answer 1

你可以这样做:它将检查用户是否使用正确的格式(“我的名字是”开头)并且不区分大小写

import Foundation

let mySentence = "My NaMe IS GioR GioR"

let mySentenceLowercased = mySentence.lowercased()

let myNameOnly = mySentence.dropFirst("my name is ".count)

if let myNameLowercased = mySentenceLowercased.components(separatedBy: "my name is ").last,
    myNameOnly.lowercased() == myNameLowercased {
    print("Your name is " + myNameOnly) // Your name is GioR GioR
} else {
    print("Input format error. The correct format is: \"My name is [your name goes here]\"")
}

例如，如果格式错误

let mySentence = "My NaMe  GioR GioR"

输出将是

//Input format error. The correct format is: "My name is [your name goes here]"