Swift替换子字符串正则表达式
Swift替换子字符串正则表达式
提问于 2015-02-13 23:51:54
我正在尝试使用正则表达式来替换字符串中所有出现的英国汽车注册。
当字符串与正则表达式完全匹配时，下面的快速代码可以完美地工作，如下所示。
var myString = "DD11 AAA"
var stringlength = countElements(myString)
var ierror: NSError?
var regex:NSRegularExpression = NSRegularExpression(pattern: "^([A-HK-PRSVWY][A-HJ-PR-Y])\\s?([0][2-9]|[1-9][0-9])\\s?[A-HJ-PR-Z]{3}$", options: NSRegularExpressionOptions.CaseInsensitive, error: &ierror)!
var modString = regex.stringByReplacingMatchesInString(myString, options: nil, range: NSMakeRange(0, stringlength), withTemplate: "XX")
print(modString)结果是XX
但是，以下代码不起作用，并且不修改该字符串
var myString = "my car reg 1 - DD11 AAA my car reg 2 - AA22 BBB"
var stringlength = countElements(myString)
var ierror: NSError?
var regex:NSRegularExpression = NSRegularExpression(pattern: "^([A-HK-PRSVWY][A-HJ-PR-Y])\\s?([0][2-9]|[1-9][0-9])\\s?[A-HJ-PR-Z]{3}$", options: NSRegularExpressionOptions.CaseInsensitive, error: &ierror)!
var modString = regex.stringByReplacingMatchesInString(myString, options: nil, range: NSMakeRange(0, stringlength), withTemplate: "XX")
print(modString)结果是my car reg 1 - DD11 AAA my car reg 2 - AA22 BBB
有谁能给我点建议吗？
回答 4
Stack Overflow用户
发布于 2016-12-06 18:44:04
让我们使用一个类扩展在Swift 3语法中进行总结：
extension String {
mutating func removingRegexMatches(pattern: String, replaceWith: String = "") {
do {
let regex = try NSRegularExpression(pattern: pattern, options: .caseInsensitive)
let range = NSRange(location: 0, length: count)
self = regex.stringByReplacingMatches(in: self, options: [], range: range, withTemplate: replaceWith)
} catch { return }
}
}
var phoneNumber = "+1 07777777777"
phoneNumber.removingRegexMatches(pattern: "\\+\\d{1,4} (0)?")结果为7777777777 (从而从电话号码中删除国家代码)
Stack Overflow用户
发布于 2016-01-08 01:00:12
Swift 2.1更新：
var myString = "my car reg 1 - DD11 AAA my car reg 2 - AA22 BBB"
if let regex = try? NSRegularExpression(pattern: "([A-HK-PRSVWY][A-HJ-PR-Y])\\s?([0][2-9]|[1-9][0-9])\\s?[A-HJ-PR-Z]{3}", options: .CaseInsensitive) {
let modString = regex.stringByReplacingMatchesInString(myString, options: .WithTransparentBounds, range: NSMakeRange(0, myString.characters.count), withTemplate: "XX")
print(modString)
}Stack Overflow用户
发布于 2019-01-27 18:09:29
Swift 4.2已更新
let myString = "my car reg 1 - DD11 AAA my car reg 2 - AA22 BBB"
if let regex = try? NSRegularExpression(pattern: "([A-HK-PRSVWY][A-HJ-PR-Y])\\s?([0][2-9]|[1-9][0-9])\\s?[A-HJ-PR-Z]{3}", options: .caseInsensitive) {
let modString = regex.stringByReplacingMatches(in: myString, options: [], range: NSRange(location: 0, length: myString.count), withTemplate: "XX")
print(modString)
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/28503449
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