Swift 查找字符串中单词的结束索引

Question

我有一个字符串。我在那个字符串里面有一个词

我想基本上摆脱字符串和单词中的所有内容。但是我想保留字符串中单词之后的所有内容。这个词和字符串可以是动态的。

这是我目前得到的结果，我发现很难找到在线资源来解决这个问题。

错误：

Cannot convert value of type 'String' to expected argument type 'String.Element' (aka 'Character')

这是我的代码

            var bigString = "This is a big string containing the pattern"
            let pattern = "containing" //random word that is inside big string
            let indexEndOfPattern = bigString.lastIndex(of: pattern) // Error here
            let newText = bigString[indexEndOfPattern...]
            bigString = newText // bigString should now be " the pattern"

Answer 1

考虑范围和范围，lastIndex(of期望单个Character

var bigString = "This is a big string containing the pattern"
let pattern = "containing" //random word that is inside big string
if let rangeOfPattern = bigString.range(of: pattern) {
    let newText = String(bigString[rangeOfPattern.upperBound...])
    bigString = newText // bigString should now be " the pattern"
}

Swift 查找字符串中单词的结束索引

Swift find the end index of a word within a string

swift

swift3

swift4