+(BOOL)validateNickname:(NSString*)nickname
{
NSString *nicknameRegex = @"^[\u4E00-\u9FA5\uf900-\ufa2d·s•]{2,20}$";
NSPredicate*passWordPredicate = [NSPredicatepredicateWithFormat:@"SELF MATCHES %@",nicknameRegex];
return[passWordPredicateevaluateWithObject:nickname];
}
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