尝试更改 Bool 属性时出现 EXC_BAD_ACCESS 错误

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问题描述

我正在尝试更改 Bool 属性并收到 EXC_BAD_ACCESS 错误.

I'm trying to change a Bool property and am receiving an EXC_BAD_ACCESS error.

我使用的是 XCode 6 和 Swift.

I'm using XCode 6 and Swift.

note 属性保存良好，但 completed 属性抛出 EXC_BAD_ACCESS 错误

The note property saves fine but the completed property throws the EXC_BAD_ACCESS error

import Foundation
import CoreData

class Task: NSManagedObject
{

    @NSManaged var note: String!
    @NSManaged var completed: Bool

}

更改属性例程

    // taskObject is an instance of Task()

    // Set the completed flag
    taskObject.completed = true // EXC_BAD_ACCESS

推荐答案

遇到同样的问题，解决方法确实是在@NSManaged属性中使用NSNumber.此外，您可以定义一个计算的 Bool 属性，以便您可以在业务逻辑中使用标量布尔值，而不是 NSNumber.

Had the same problem, the solution is indeed to use NSNumber in the @NSManaged property. Additionally you could define a computed Bool property so that you can work with the scalar Boolean in your business logic and not with the NSNumber.

var isCompleted: Bool {
get {
    return completed == NSNumber(bool: true)
}
set {
    completed = NSNumber(bool: newValue)
}
}

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