在 Unity C# 中编写正确的代码，但没有得到预期的 output

Question

I have written the folowing code (given below) -

using UnityEngine;
using System.Collections;

public class NewBehaviourScript : MonoBehaviour {

void Update () {
    if (Input.GetKeyDown(KeyCode.RightArrow))
        transform.position += Vector3.right;
}
}

According the the code, the sprite needs to move right when right arrow is pressed. But the sprite is not moving. So what is wrong in the code?

Note- I am using Unity version 5.4

Answer 1

According to the documentation , you can't hold the key pressed, you have to press it over and over again.

Then, as Everts mentioned, you should always include Time.deltaTime in your calculation to avoid issues when your application is lagging for whatever reason.

So you need two steps:

1. Use Everts' suggestion transform.position += Vector3.right * Time.deltaTime * speed; and try to figure out how big speed might be. It might be anywhere from: 0.1, 0.01, 0.001 up to 1, 10, 100 etc, whatever suits you. But this formula will prevent a lot of issues in the future.
2. Use Input.GetKey instead of Input.KeyKeyDown