正則表達式g是全局搜索

Question

我使用：

var test = "pizzazz" 

if let match = test.range(of: "g/zz", options: .regularExpression) { 
    print(test.substring(with: match)) 
} 

這 如何設置全局搜索摹？

Answer 1

我不知道什麼應該是你的榜樣的結果，但你可能尋找這些功能之一：

1）

func enumerateMatches(in string: String, 
       options: NSRegularExpression.MatchingOptions = [], 
       range: NSRange, 
       using block: (NSTextCheckingResult?, NSRegularExpression.MatchingFlags, UnsafeMutablePointer<ObjCBool>) -> Void) 

https://developer.apple.com/reference/foundation/nsregularexpression/1409687-enumeratematches

2）

func matches(in string: String, 
     options: NSRegularExpression.MatchingOptions = [], 
      range: NSRange) -> [NSTextCheckingResult] 

https://developer.apple.com/reference/foundation/nsregularexpression/1412446-matches

3）

func stringByReplacingMatches(in string: String, 
         options: NSRegularExpression.MatchingOptions = [], 
         range: NSRange, 
       withTemplate templ: String) -> String 

https://developer.apple.com/reference/foundation/nsregularexpression/1413740-stringbyreplacingmatches

4）

func replaceMatches(in string: NSMutableString, 
      options: NSRegularExpression.MatchingOptions = [], 
       range: NSRange, 
     withTemplate templ: String) -> Int 

https://developer.apple.com/reference/foundation/nsregularexpression/1411139-replacematches