#pragma mark - 驗證金額

+ (BOOL)checkPrice:(NSString *)price {

/*

1.可以輸入小數(shù)點(diǎn)后兩位

2.? (1.)這種情況要避免

3. 只能輸入非負(fù)整數(shù)

4.第一位是0,第二位不能是0

*/

//^([1-9]\d*|0)(\.\d?[1-9])?$ 金額

//@"^(0?[1-9]\\d*|0)(\\.\\d?[1-9])?$"; 可01

NSString *pattern = @"^([1-9]\\d*|0)(\\.\\d?[1-9])?$";

NSPredicate *pred = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", pattern];

BOOL isMatch = [pred evaluateWithObject:price];

return isMatch;

}