检查一个Int值是否大于或等于另一个Int?价值? [英] Check if an Int value is greater or equal to another Int? value?

问题描述

您如何比较两个Int值?所以，我有这个:

How do you compare two Int values? So, I have this:

let limit: Int?
let current: Int = Int(self.stringValue)!

但是当我尝试比较它们时(大于或等于):

But when I try to compare them (greater or equal to):

  if (current >= self.limit) {
            value = amount
        } else {
            value = current * 10 + amount
            if value > self.max! {
                value = amount
            }

    }

我得到了错误:

二进制运算符'> ='不能应用于类型为'Int'的操作数，并且 整数?"

Binary operator '>=' cannot be applied to operands of type 'Int' and 'Int?'

如何解决这个问题?

推荐答案

由于limit是可选的Int(Int?)，它可能为零，不能与current直接比较.因此，首先请打开可选选项以检测并避免处理零个案例，而仅比较非零个案例.

Because limit is an optional Int (Int?) it may be nil and not directly comparable with current. So first unwrap the optional to detect and avoid handle nil cases, and only compare non-nil cases.

if let limit = self.limit, current >= limit {
    value = amount
} else {
    value = current * 10 + amount
    if value > self.max! {
        value = amount
    }
}

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