Swift:获取字符串中子字符串开始的索引 [英] Swift: get index of start of a substring in a string

问题描述

是否可以在字符串中搜索子字符串开头的索引?

Is there a way to search a string for the index of the start of a substring?

例如，"hello".indexOf("el")将返回1.谢谢

推荐答案

您可以使用rangeOfString函数来查找并返回给定字符串在给定范围内首次出现的范围，如下所示:

You can reach using the rangeOfString function that finds and returns the range of the first occurrence of a given string within a given range like in the following way:

var text = "Hello Victor Sigler"

if let indexOf = text.rangeOfString("Victor")?.startIndex {
   println(indexOf) //6
}

希望这对您有所帮助.

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