Question

class ABC{
   @NSManaged var liked: Bool
   .....
 }

在其他班级

class xyz{
 func afunc(){
 let item = ABC()
   if item.liked == true{ // getting crash on this line
}}}

[错误]：输入信息TC，N，D尚不支持

*由于未捕获的异常'NSInvalidArgumentException'终止应用程序，原因：' - [...]：无法识别的选择器发送到实例0x15d78310'   * 首先抛出调用堆栈：

我只是访问我在类中创建的值它在一台设备上工作正常（ios版本8.1和8.3）并在另一台设备上抛出错误（ios版本8.4）。

Answer 1

我认为您已创建0。那么它应该如下：

swift class

Answer 2

 class ClassA: NSObject {
    var liked:Bool

    override init() {
      liked = true
    }
}


class ViewController: UIViewController {

    override func viewDidLoad() {
       super.viewDidLoad()
       execute();
      // Do any additional setup after loading the view, typically from a nib.
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

    func execute(){
        let item = ClassA();
        if item.liked==true{
           print(item.liked)
        }
     }
}

[错误]：尚未支持类型信息TC，N，D

2 个答案: