#pragma mark - 微信號的正則表達式 微信賬號僅支持6-20個字母、數字、下劃線或減號，以字母開頭
+ (BOOL)isWxNumber:(NSString *)WXNum{
??? NSString *passWordRegex = @"^[a-zA-Z][a-zA-Z0-9_-]{5,19}$";
??? NSPredicate *passWordPredicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",passWordRegex];
??? return [passWordPredicate evaluateWithObject:WXNum];
}