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//正则表达式限制只能为（金额小数点前十位，小数点后五位）-(BOOL)isVersion{    NSString *match = @"^[0-9]{1,10}([.][0-9]{1,5})?$";    NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF matches %@",match];    return [predicate evaluateWithObject:self];}