# Swift4 KVC给类属性赋值报错

**URL:** https://www.shiqidu.com/t/topic/588
**Category:** 开发调优
**Tags:** Swift
**Created:** [2019 年5 月 29 日 06:51 UTC](https://www.shiqidu.com/t/topic/588 "2019-05-29T06:51:13Z")
**Posts on this page:** 1
**Page:** 1

<div class="post-metadata">

### 作者： ![Eureka](https://www.shiqidu.com/user_avatar/www.shiqidu.com/eureka/32/5_2.png) [@Eureka](https://www.shiqidu.com/u/Eureka)
#### 发布日期： [2019 年5 月 29 日 06:51 UTC](https://www.shiqidu.com/t/topic/588/1 "2019-05-29T06:51:13Z")

</div>

```swift
class Person : NSObject {
    var name : String?
    var age : Int = 0
    
    override init() {
        super .init()
    }
    
    init(dict : [String : Any]) {
        super.init()
        setValuesForKeys(dict)
    }
}

let p2 = Person(dict: ["name": "jakie", "age" : 61])
print(p2.name ?? "NoOne")
print(p2.age)

```

在使用kvc给类属性赋值时报了下面的错

```auto
error: Execution was interrupted, reason: signal SIGABRT. The process has been left at the point where it was interrupted, use "thread return -x" to return to the state before expression evaluation.

```

解决这个错需要在属性前面加上`@objc`，如下

```swift
class Person : NSObject {
    @objc var name : String?
    @objc var age : Int = 0
    ...
}

```