Question

谁能告诉我，如果我在GameViewController中将委托设置为“ self”，为什么agentDidUpdate（）起作用，但是当将委托设置为Player类时却没有，为什么这两个类都是GKAgentDelegate。该项目可以在这里下载-> https://drive.google.com/open?id=10l44gSKmhiYz21FDYEOKrWKU-y_ScCEL

GameViewController.swift

//This works
 func createPlayerAgent()
    {
        let p = Player()
        let agent = GKAgent3D()
        agent.delegate = self
        agent.behavior = GKBehavior()
        agentSystem.addComponent(agent)
    }
//This does not
 func createPlayerAgent()
    {
        let p = Player()
        let agent = GKAgent3D()
        agent.delegate = p
        agent.behavior = GKBehavior()
        agentSystem.addComponent(agent)
    }

@objc func renderer(_ renderer: SCNSceneRenderer,updateAtTime time: TimeInterval)
{
    print("renderer")
    // Calculate delta since last update and pass along to the agent system.
    if (self.lastUpdateTime == 0) {
        self.lastUpdateTime = time;
    }

    let delta = time - self.lastUpdateTime
    self.lastUpdateTime = time;
    print(delta)
    self.agentSystem.update(deltaTime: delta)
}

@objc func agentDidUpdate(_ agent: GKAgent3D)
{
    print("agentDidUpdate")
}

Player.swift

import Foundation
import GameplayKit

class Player:NSObject , GKAgentDelegate
{

    required init(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }

    override init()
    {
        super.init()
    }

    @objc func agentDidUpdate(_ agent: GKAgent3D)
    {
        print("---agentDidUpdate")

    }

}

Answer 1

这是范围问题。功能启用后，p将不保存而被释放。

   {
    let p = Player()
    let agent = GKAgent3D()
    agent.delegate = p
  }

您必须保存p才能生存。

带有GKAgentDelegate的子类未调用agentDidUpdate

1 个答案: