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Question

我的控制台打印：“ModelToControllerDelegate.Model”。

导入基础

类模型{ 让名字：字符串 让姓氏：字符串

init(firstName: String, lastName: String) {
    self.firstName = firstName
    self.lastName = lastName
}

}

导入基础

协议DataModelDelegate：类{ func didRecievedDataUpdate（数据：模型） }

类模型控制器 {

weak var delegate: DataModelDelegate?

func requestData() {
    let data = Model(firstName: "Jack", lastName: "Johnson")
    delegate?.didRecievedDataUpdate(data: data)

}

}

导入 UIKit

类视图控制器：UIViewController {

let modelController = ModelController()

@IBOutlet weak var label: UILabel!

override func viewDidLoad() {
    super.viewDidLoad()

    modelController.delegate = self
    modelController.requestData()
}

}

扩展视图控制器：DataModelDelegate { func didRecievedDataUpdate（数据：模型）{ 打印（数据） } }

Answer 1

添加

    extension ViewController: DataModelDelegate { 
     func didRecievedDataUpdate(data: Model) { 
     print(data) // data is object of class Model so output is"ModelToControllerDelegate.Model"
     print(data.firstName) // firstName is String so Output is Jack
     print(data.lastName)  // lastName is String so Output is Johnson
     } 
    }