Question

我希望将从一个字符的索引开始的字符串替换为另一个字符的结尾。示例将字符串(中的)索引中的所有字符替换为Somesong here - Artist (radio edit)的索引，或者即使字符串为Somesong here - Artist (radio edit) (another one)。任何帮助将不胜感激。

我已经尝试了这个，但我不认为我会解决，我不太确定如何从一个范围开始删除子串。

var a =  "Somesong here - Artist (radio edit)"
let range = a.rangeOfString("(")
let range2 = a.rangeOfString(")")

Answer 1

你可以像这样使用-范围：

 var str = "Somesong here - Artist (radio edit)"
 if let range = str.rangeOfString("-") {
     // str = Somesong here
     str.removeRange(range.startIndex..<str.endIndex)
 }

// str = Somesong here - New Artist
str += "- New Artist"

如果您想使用(范围：

var str = "Somesong here - Artist (radio edit)"
if let range = str.rangeOfString("(") {
// str = Somesong here - Artist 
    str.removeRange(range.startIndex..<str.endIndex)
}

// str = Somesong here - Artist (not a radio edit)
str += "(not a radio edit)"

您可以使用str += ...添加if let。

Answer 2

使用两个范围创建新范围并致电replaceRange：

var a =  "Somesong here - Artist (radio edit)"
let range = a.rangeOfString("(")
let range2 = a.rangeOfString(")")

a.replaceRange(range!.startIndex...range2!.startIndex, with: "(live version)")
print(a) // Somesong here - Artist (live version)

从一个字符的索引替换到另一个字符的结尾

2 个答案: