Swift：如何创建具有Int值的谓词？ [英] Swift: How do I create a predicate with an Int value?

问题描述

我在此语句上收到EXC-BAD-ACCESS错误：

I am getting an EXC-BAD-ACCESS error on this statement:

var thisPredicate = NSPredicate(format: "(sectionNumber == %@"), thisSection)

thisSection的Int值为1，并显示该值当我将鼠标悬停在上方时为1。但是在调试区域中，我看到了：

thisSection has an Int value of 1 and displays the value 1 when I hover over it. But in the debug area I see this:

thisPredicate = (_ContiguousArrayStorage ...)

另一个使用字符串的谓词显示为ObjectiveC.NSObject
为什么会发生这种情况？

Another predicate using a String shows as ObjectiveC.NSObject Why is this happening?

推荐答案

当您的数据安全或卫生后，您可以尝试使用字符串插值快速标准库参考。看起来像这样：

When your data is safe or sanitized, you might try String Interpolation Swift Standard Library Reference. That would look something like this:

let thisSection = 1
let thisPredicate = NSPredicate(format: "sectionNumber == \(thisSection)")

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