相关疑难解决方法(0)

我正在尝试更改Bool属性并收到EXC_BAD_ACCESS错误.

我正在使用XCode 6和Swift.

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

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