Swift：转义闭包捕获非转义参数“onCompletion”

我的 swift 有问题。我正在尝试发送 API 请求，然后检索数据，但收到以下错误消息：

“Swift：转义闭包捕获非转义参数‘onCompletion’”。

有谁知道我该如何解决这个问题？提前致谢

Code:

class RestApiManager: NSObject {
    static let sharedInstance = RestApiManager()
    
    let baseURL = "http://api.randomuser.me/"
    
    func getRandomUser(onCompletion : (JSON) -> Void) {
        makeHTTPGetRequest(path: baseURL, onCompletion: { json, err -> Void in
            onCompletion(json)
        })
    }
    
    func makeHTTPGetRequest(path: String, onCompletion: ServiceResponse) {
        let request = NSMutableURLRequest(url : URL(string: path)! as URL)
        
        let session = URLSession.shared
        
        let task = session.dataTask(with: request as URLRequest, completionHandler: { data, response, error in
            let json:JSON = JSON(data as Any)
            onCompletion(json, error as NSError?)
        })
        task.resume()
    
    }
}

您必须将两个完成处理程序标记为@escaping。通常编译器会提供修复

class RestApiManager: NSObject {
    static let sharedInstance = RestApiManager()

    let baseURL = "http://api.randomuser.me/"

    func getRandomUser(onCompletion : @escaping (JSON) -> Void) {
        makeHTTPGetRequest(path: baseURL, onCompletion: { json, err -> Void in
            onCompletion(json)
        })
    }

    func makeHTTPGetRequest(path: String, onCompletion: @escaping ServiceResponse) {
        let request = NSMutableURLRequest(url : URL(string: path)! as URL)

        let session = URLSession.shared

        let task = session.dataTask(with: request as URLRequest, completionHandler: { data, response, error in
            let json:JSON = JSON(data as Any)
            onCompletion(json, error as NSError?)
        })
        task.resume()

    }
}