xcode 正则表达式只允许字符串和数字
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Regular expression to allow only string and number
提问by Vinod Vishwakarma
I'm making the pattern to check the user can only enter number and string. Please anyone can help me or give some reference. Following is my code. Thnks in advance.
我正在制作模式来检查用户只能输入数字和字符串。请任何人都可以帮助我或提供一些参考。以下是我的代码。提前谢谢。
NSString *regEx =
@"(?:[a-z0-9!#$%\&'*+/=?\^_`{|}~-]+(?:\.[a-z0-9!#$%\&'*+/=?\^_`{|}"
@"~-]+)*|\"(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21\x23-\x5b\x5d-\"
@"x7f]|\\[\x01-\x09\x0b\x0c\x0e-\x7f])*\")@(?:(?:[a-z0-9](?:[a-"
@"z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?|\[(?:(?:25[0-5"
@"]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-"
@"9][0-9]?|[a-z0-9-]*[a-z0-9]:(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21"
@"-\x5a\x53-\x7f]|\\[\x01-\x09\x0b\x0c\x0e-\x7f])+)\])";
NSString *strRoadworthyGet=@"vinod123";
NSPredicate *matchPattern =[NSPredicate predicateWithFormat:@"SELF MATCHES %@",regEx];
BOOL resultMatch =[matchPattern evaluateWithObject:strRoadworthyGet];
if(!resultMatch)
NSLog(@"invalid pattern");
回答by krammer
You can use NSCharacterSet's alphanumericmethod to return check for Letters, Marks and Numbers.
您可以使用 NSCharacterSet 的字母数字方法返回字母、标记和数字的检查。
If you want to go for RegularExpression, you can use
如果你想使用正则表达式，你可以使用
NSString *regEx = @"^[a-zA-Z0-9]*$";
