脚本附加到不在场景中的预制件。按钮有标签。
我尝试在检查器中拖放按钮,但引擎不会让我。我尝试通过标签找到它,但我得到一个异常“不能隐式转换类型UnityEngine.GameObject到UnityEngine.UI.Button”,当我转换时,我得到一个异常,我无法通过内置转换转换这些类型。 一些帮助? 如何获得对按钮的引用? 这是代码:
using UnityEngine;
using System.Collections;
using UnityEngine.UI;
public class TankShooting : MonoBehaviour {
private Transform ShootingCameraTransform;
private PlayerTankMovement playerTankMovement;
public Button shootButton;
// Use this for initialization
void Start () {
shootButton = GameObject.FindGameObjectWithTag ("ShootButton") as Button;
shootButton.onClick.AddListener ((UnityEngine.Events.UnityAction)this.OnShootButtonClick);
playerTankMovement = GetComponent<PlayerTankMovement> ();
Transform t = transform;
foreach (Transform tr in t)
{
if (tr.tag == "ShootingCamera")
{
ShootingCameraTransform = tr.transform;
}
}
}
// Update is called once per frame
void Update () {
}
public void OnShootButtonClick()
{
Debug.Log ("Success");
}
}
答案 0 :(得分:5)
查看您的代码,还有另一个问题:
shootButton = GameObject.FindGameObjectWithTag ("ShootButton") as Button;
你不能像这样将组件(Button
)强制转换为GameObject。您必须使用GetComponent
从GameObject获取Button
组件。
我无法在检查器中拖放按钮,当我找到它时 通过标签我无法将其从GameObject转换为Button
那是因为您拖动到shootButton插槽的GameObject不是Button或者没有附加Button组件。必须有Button组件才能将其拖动到Button
(shootButton)插槽。
您必须创建一个Button,然后将该Button拖到shootButton
位置。
您可以先执行删除
shootButton = GameObject.FindGameObjectWithTag ("ShootButton") as Button;
shootButton.onClick.AddListener ((UnityEngine.Events.UnityAction)this.OnShootButtonClick);
然后将Button
拖到shootButton
广告位:
或
从脚本中获取引用:
如果您想从脚本执行此操作,请替换
shootButton = GameObject.FindGameObjectWithTag ("ShootButton") as Button;
shootButton.onClick.AddListener ((UnityEngine.Events.UnityAction)this.OnShootButtonClick);
与
shootButton = GameObject.FindGameObjectWithTag("ShootButton").GetComponent<Button>();
shootButton.onClick.AddListener(() => OnShootButtonClick());