Time.time

# [Time](https://docs.unity3d.com/cn/2019.4/ScriptReference/Time.html).time

public static float **time** ;

## 描述

该帧开始的时间（只读）。此为自游戏启动以来的时间（以秒为单位）。

Time.time 是应用程序已运行的时间（以秒为单位）。它是只读的。

应用程序在每帧开始时接收当前的 [Time.time](https://docs.unity3d.com/cn/2019.4/ScriptReference/Time-time.html)，该值按帧递增。每个帧的 [time](https://docs.unity3d.com/cn/2019.4/ScriptReference/Time-time.html) 调用将接收相同的值。在从 `FixedUpdate` 中调用时，将返回 [Time.fixedTime](https://docs.unity3d.com/cn/2019.4/ScriptReference/Time-fixedTime.html) 属性。

应避免常规的（每帧）调用：[Time.time](https://docs.unity3d.com/cn/2019.4/ScriptReference/Time-time.html) 倾向于提供应用程序已经运行的时间长度，而不是每帧的时间。

[Time.time](https://docs.unity3d.com/cn/2019.4/ScriptReference/Time-time.html) 的值在 `Awake` 消息期间未定义，将在所有消息完成后开始。

```
using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Example : MonoBehaviour
{
    private int width, height;
    private Rect rect;
    private GUIStyle labelStyle;
    private string currentTime;

void Awake()
    {
        width = Screen.width;
        height = Screen.height;
        rect = new Rect(10, 10, width - 20, height - 20);
    }

void OnGUI()
    {
        // Display the label at the center of the window.
        labelStyle = new GUIStyle(GUI.skin.GetStyle("label"));
        labelStyle.alignment = TextAnchor.MiddleCenter;

// Modify the size of the font based on the window.
        labelStyle.fontSize = 12 * (width / 200);

// Obtain the current time.
        currentTime = Time.time.ToString("f6");
        currentTime = "Time is: " + currentTime + " sec.";

// Display the current time.
        GUI.Label(rect, currentTime, labelStyle);
    }
}
```