ios - stringByReplacingOccurrencesOfString 给出奇怪的错误

Question

出于某种原因，这给了我一个错误。swearWordPair 定义为 [String]。例如["你好", "嗨"]

让 swearWordsAndReplacements : [[String]] = [["anus", "butt"], ["arse", "butt"]]

这给我的错误是

Cannot invoke 'stringByReplacingOccurrencesOfString' with an argument list of type '(String, withString: String, options: NSStringCompareOptions, range: NSRange)

但是，我查了这个函数的参数，似乎我的所有参数都是正确的。这是一个 swift 错误吗？

var string = insult
for swearWordPair in swearWordsAndReplacements {
    string = string.stringByReplacingOccurrencesOfString(swearWordPair[0],
        withString: swearWordPair[1],
        options: NSStringCompareOptions.CaseInsensitiveSearch,
        range: NSMakeRange(0, count(string)))
}

Answer 1

Range不是 NSRange ，而是一个 Swift范围。在这种情况下，您可以通过 nil代表整个 String :

string = string.stringByReplacingOccurrencesOfString(swearWordPair[0],
    withString: swearWordPair[1],
    options: .CaseInsensitiveSearch,
    range: nil)

如果你想限制范围，你可以创建一个Range<String.Index>像这样:

var string = "I laid my head at the head of the bed"

// Only replace within the first 15 characters
let myrange = string.startIndex ..< advance(string.startIndex, 15)

string = string.stringByReplacingOccurrencesOfString("head",
    withString: "blanket",
    options: .CaseInsensitiveSearch,
    range: myrange)

println(string)

输出:

I laid my blanket at the head of the bed