Swift: get index of start of a substring in a string [duplicate]

问题

This question already has answers here:

Swift is there a method that gives the index of a substring inside another string (2 answers)

Closed 4 years ago.

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

Like, "hello".indexOf("el") would return 1. Thanks

回答1:

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
}

I hope this help you.

来源：https://stackoverflow.com/questions/32105260/swift-get-index-of-start-of-a-substring-in-a-string