我正在使用XCode 6和Swift.

note属性保存不错,但已完成的属性会抛出EXC_BAD_ACCESS错误

import Foundation
import CoreData

class Task: NSManagedObject
{

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

}

改变属性程序

// taskObject is an instance of Task()

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

解决方法

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

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