我正在寻找一种方法来取代字符在一个Swift字符串。
示例:“This is my string”
我想用“+”替换“”以获得“This+is+my+string”。
我怎样才能做到这一点呢?
我正在寻找一种方法来取代字符在一个Swift字符串。
示例:“This is my string”
我想用“+”替换“”以获得“This+is+my+string”。
我怎样才能做到这一点呢?
当前回答
Xcode 11•Swift 5.1
StringProtocol replacingOccurrences的突变方法可以实现如下:
extension RangeReplaceableCollection where Self: StringProtocol {
mutating func replaceOccurrences<Target: StringProtocol, Replacement: StringProtocol>(of target: Target, with replacement: Replacement, options: String.CompareOptions = [], range searchRange: Range<String.Index>? = nil) {
self = .init(replacingOccurrences(of: target, with: replacement, options: options, range: searchRange))
}
}
var name = "This is my string"
name.replaceOccurrences(of: " ", with: "+")
print(name) // "This+is+my+string\n"
其他回答
这在swift 4.2中很容易做到。只需使用replacingOccurrences(of: " ", with: "_")进行替换
var myStr = "This is my string"
let replaced = myStr.replacingOccurrences(of: " ", with: "_")
print(replaced)
var str = "This is my string"
print(str.replacingOccurrences(of: " ", with: "+"))
输出是
This+is+my+string
我认为Regex是最灵活和可靠的方法:
var str = "This is my string"
let regex = try! NSRegularExpression(pattern: " ", options: [])
let output = regex.stringByReplacingMatchesInString(
str,
options: [],
range: NSRange(location: 0, length: str.characters.count),
withTemplate: "+"
)
// output: "This+is+my+string"
修改现有可变字符串的类别:
extension String
{
mutating func replace(originalString:String, withString newString:String)
{
let replacedString = self.stringByReplacingOccurrencesOfString(originalString, withString: newString, options: nil, range: nil)
self = replacedString
}
}
使用:
name.replace(" ", withString: "+")
斯威夫特5.5
我正在使用这个扩展:
extension String {
func replaceCharacters(characters: String, toSeparator: String) -> String {
let characterSet = CharacterSet(charactersIn: characters)
let components = components(separatedBy: characterSet)
let result = components.joined(separator: toSeparator)
return result
}
func wipeCharacters(characters: String) -> String {
return self.replaceCharacters(characters: characters, toSeparator: "")
}
}
用法:
"<34353 43434>".replaceCharacters(characters: "< >", toSeparator:"+") // +34353+43434+
"<34353 43434>".wipeCharacters(characters: "< >") // 3435343434