如何暂停由js和html5制作的简单画布游戏？ [英] How to pause simple canvas game, made with js and html5?

问题描述

按照YouTube上的一些简单教程，我创建了一个简单的蛇游戏。

I created a simple snake game after following some simple tutorials on YouTube.

问题是游戏没有暂停功能（例如，按P时游戏应暂停/继续播放），并且当蛇碰到画布的边框时，游戏会自行重启（但这是另一个问题）。

The problem is that the game does not have a pause function (e.g. when pressing P the game should pause/resume) and when the snake hits the border of the canvas the game restarts itself (but that is another problem).

这是我在游戏中拥有的完整代码： https： //pastebin.com/URaDxSvF

Here is the complete code I have of the game: https://pastebin.com/URaDxSvF

我创建的与暂停相关的功能：

The pause-related functions I've created:

function gamePaused{ /**i need help on this**/ }

function keyDown(e) {
  if (e.keyCode == 80) pauseGame();
}

function pauseGame() {
  if (!gamePaused) {
    game = clearTimeout(game);
    gamePaused = true;
  } else if (gamePaused) {
    game = setTimeout(loop, 1000 / 30);
    gamePaused = false;
  }
}

推荐答案

创建一个布尔值变量，称为suspended，如果玩家按p，则将其设置为true，然后在运行游戏的循环中放置一个if语句。并说出是否（！paused）{运行循环}

Create a Boolean variable called paused and set it to true if the player presses p, Then put an if statement around the loop that runs your game. and say if (!paused){run loop}

您可以为按下p时创建一个切换暂停功能。

You can create a toggle pause function for when p is pressed.

function togglePause()
{
    if (!paused)
    {
        paused = true;
    } else if (paused)
    {
       paused= false;
    }

}

您还需要创建一个事件何时按下p的侦听器
像这样

You also need to create an event listener for when p is pressed Like this

window.addEventListener('keydown', function (e) {
var key = e.keyCode;
if (key === 80)// p key
{
    togglePause();
}
});

在顶部放置游戏对象和常量的状态为paused = false，并在循环函数中

up the top where you have Game objects and constants put in paused = false, and in your loop function do this

 draw(); 
if(!paused)
{ 
update(); 
}

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