ios – Swift 2.0：使用Set时,无法将值MyApp.MyCustomClass转换

Could not cast value of type MyApp.Member (0x1674daf8) to MyAppTests.Member (0x4c07248).

您可以轻松地重现错误：

>设置两个NSManagedObject

@objc(Member)
class Member: NSManagedObject {
    @NSManaged var family: Family
}

@objc(Family)
class Family: NSManagedObject {
    @NSManaged var members: Set<Member>
}

>也可以在.xcdatamodel中设置它：
>然后在你的TestFile中：

func testA() {

    let family = Family.MR_createEntityInContext(context)
    let father = Member.MR_createEntityInContext(context)

    father.family = family

    let firstMember = family.members.first

    XCTAssertEqual(firstMember!,father)
}