ios String.range 在 Swift 3.0 中的使用
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Usage of String.range in Swift 3.0
提问by H. Cliff
let us = "http://example.com"
let range = us.rangeOfString("(?<=://)[^.]+(?=.com)", options:.RegularExpressionSearch)
if range != nil {
let found = us.substringWithRange(range!)
print("found: \(found)") // found: example
}
This code extracts substringbetween backslashes and dot com in Swift 2. I searched Internet and I found that rangeOfStringchanged to range().
这段代码substring在 Swift 2 中的反斜杠和 dot com 之间提取。我搜索了互联网，发现它rangeOfString变成了range().
But still I could not make the code work in Swift 3.0. Could you help me ?
但是我仍然无法使代码在 Swift 3.0 中工作。你可以帮帮我吗 ？
edit : I'm using swift 3 07-25 build.
编辑：我正在使用 swift 3 07-25 build。
回答by Nirav D
In swift 3.0rangeOfStringsyntax changed like this.
在 swift 3.0 中，rangeOfString语法变成了这样。
let us = "http://example.com"
let range = us.range(of:"(?<=://)[^.]+(?=.com)", options:.regularExpression)
if range != nil {
let found = us.substring(with: range!)
print("found: \(found)") // found: example
}
回答by pedrouan
In latest swift 3.0 using Xcode 8 Beta 6 (latest updates to SDK):
在最新的 swift 3.0 中，使用 Xcode 8 Beta 6（SDK 的最新更新）：
let us = "http://example.com"
let range = us.range(of: "(?<=://)[^.]+(?=.com)", options: .regularExpression)
if range != nil {
let found = us.substring(with: range!)
print("found: \(found)") // found: example
}
