(1)去掉所有的特殊字符和标点符号 +(NSString *)deleteCharacters:(NSString *)targetString{if(targetString.length==0|| !targetString) {returnnil; } NSError*error =nil; NSString*pattern =@"[^a-zA-Z0-9\u4e00-\u9fa5]";//正则取反NSRegularExpression *regularExpress = [NSRegularExpression reg...
foreach (string word in words) { if (rx.IsMatch(word)) { Console.WriteLine($"{word} does match"); } else { Console.WriteLine($"{word} does not match"); } } We go through the list of words. The IsMatch method returns true if the word matches the regular expression. ...
When calling regexprep, pass an additional input that is an expression that specifies a pattern for the replacement. Steps for Building Expressions There are three steps involved in using regular expressions to search text for a particular term: Identify unique patterns in the string This entails...
接下来,我们需要使用NSRegularExpression对象对文本进行匹配。下面是一个示例代码: NSString *text = @"Hello, World! This is an example text."; NSArray<NSTextCheckingResult *> *matches = [regex matchesInString:text options:0 range:NSMakeRange(0, text.length)]; 1. 2. 代码解释: matchesInString:op...
Any other character appearing in a regular expression is ordinary, unless a\precedes it. Special characters serve a special purpose. For instance, the.matches anything except a new line. A regular expression likes.nmatches any three-character string that begins withsand ends withn, includingsunand...
All the regular expression functions support Unicode. A single Unicode character always counts as one character (that is, the POSIX meta-character.matches exactly one Unicode character), regardless of the byte-length of the corresponding binary representation of that character. Also, for functions tha...
re.match(pattern, string, flags=0)Method. Searches the beginning of a string for a match to the regular expression pattern and returns the corresponding match object. ReturnsNoneif no match is found. re.fullmatch(pattern, string, flags=0)Method. If the whole string matches the regular express...
A regular expression (or RE) specifies a set of strings that matches it; the functions in this module let you check if a particular string matches a given regular expression (or if a given regular expression matches a particular string, which comes down to the same thing). ...
Principle 2: In an alternationa|b|c..., the leftmost alternative that allows a match for the whole regular expression will be the one used. Principle 3: The maximal matching quantifiers?,*,+, and{n,m}will in general match as much of the string as possible while still allowing the whol...
NSRegularExpression.FindFirstMatch(String, NSMatchingOptions, NSRange) 方法 参考 反馈 本文内容 定义 适用于 定义 命名空间: Foundation 程序集: Xamarin.iOS.dll C# 复制 [Foundation.Export("firstMatchInString:options:range:")] public virtual Foundation.NSTextCheckingResult FindFirstMatch(string ...