贡献者:赵大财
博客:https://my.oschina.net/zhaodacaiGitHub:https://github.com/zhaodacai
邮箱: zhaodacai@yeah.com QQ:327532817
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先直接来代码:
fileprivate func check(str: String) {
do {
let pattern = "[^a-z]"
let regex = try NSRegularExpression(pattern: pattern,options: .caseInsensitive)
let dacaiRange = NSMakeRange(0,str.characters.count)
//匹配到的个数
let resa = regex.numberOfMatches(in: str,options: [],range: dacaiRange)
print(resa)
//匹配第一个结果集
guard let resb = regex.firstMatch(in: str,range: dacaiRange) else {
return
}
print((str as Nsstring).substring(with: resb.range))
//第一个结果的range
print(regex.rangeOfFirstMatch(in: str,options:[],range: dacaiRange).location)
//匹配全部
let resc = regex.matches(in: str,options: NSRegularExpression.MatchingOptions(rawValue: 0),range:dacaiRange)
for checkingRes in resc {
print(checkingRes.range.location,checkingRes.range.length)
print((str as Nsstring).substring(with: checkingRes.range))
}
//替换
let newStr = regex.stringByReplacingMatches(in: str,range: dacaiRange,withTemplate: "-e-")
print(newStr)
}
catch {
print(error)
}
NSRegularExpression.Options caseInsensitive 不区分大小写 allowCommentsAndWhitespace允许注释和空白 ignoreMetacharacters 忽略字符 dotMatchesLineseparators 匹配行空格符 anchorsMatchLines 锚配线 useUnixLineseparatorsUnix行分隔符 useUnicodeWordBoundariesUnicode字边界