iOS开发常用正则表达式

1. 匹配整数或小数

- (BOOL) validateEmail:(NSString *)txt  {      NSString *regex = @"^([0-9]+)|([0-9]\\.[0-9]+)$";    NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",regex];    return [predicate evaluateWithObject:txt];}