Question

我理解刻度，20秒到一秒等等但我没有得到语法。有人能向我解释用滴答声制作东西的步骤吗？我有一个火球移动到这里作为我需要蜱虫的例子;在每次它完成效果之后，我需要它等待，2个滴答。我看过其他例子，但我真的不懂语法

@EventHandler
public void onPlayerInteractBlockFireBall(PlayerInteractEvent event) {
    Player player = event.getPlayer();
    if (player.getItemInHand().getType() == Material.MAGMA_CREAM){
        List<Block> targets = player.getLineOfSight((Set)null, 30);
        for (Block targetblock : targets){
            Location target = targetblock.getLocation();
            player.getWorld().playEffect(target, Effect.MOBSPAWNER_FLAMES,5);
        }
    }
}

我需要知道如何在循环中添加延迟，时间对于我想要制作的插件非常重要，我只需要知道语法。有人帮忙吗？

Answer 1

要制作计时器，您可以使用

Bukkit.getServer().getScheduler().runTaskLater(plugin, new Runnable(){
  public void run(){
    //code
  }
},ticksToWait);//run code in run() after ticksToWait ticks

因此，如果您想在运行函数shootFireball()之前等待2个滴答，例如，您可以使用

Bukkit.getServer().getScheduler().runTaskLater(plugin, new Runnable(){
  public void run(){
    shootFireball();
  }
},2L);//run code in run() after 2 ticks

plugin将是您Main班级的实例（extends JavaPlugin）。因此，例如，onEnable类中的onDisable和Main函数可能如下所示：

public static Main that; //in your case "plugin" would be "Main.that"

@Override
public void onEnable(){
    that = this; //Main.that is now equal to this class
}

@Override
public void onDisable(){
    that = null; //Set to null to prevent memory leaks
}

所以，你的代码看起来像这样：

@EventHandler
public void onPlayerInteractBlockFireBall(PlayerInteractEvent event) {
    Player player = event.getPlayer();
    if (player.getItemInHand().getType() == Material.MAGMA_CREAM){
        List<Block> targets = player.getLineOfSight((Set)null, 30);
        for (int i = 0; i < targets.size(); i++){
            //call the spawnFlames with "i * 2" ticks, because
            //every time "i" is incremented, there is a new target block
            //which means we should wait 2 more ticks than the previous
            //iteration before running the task
            spawnFlames(player, targets.get(i), i * 2);
        }
    }
}

public void spawnFlames(final Player player, final Block target, final long ticks){
    Bukkit.getServer().getScheduler().runTaskLater(Main.that, new Runnable(){
        public void run(){
            Location target = targetblock.getLocation();
            player.getWorld().playEffect(target, Effect.MOBSPAWNER_FLAMES,5);
        }
    },ticks);
    //run code in run() after "ticks" ticks
    //"ticks" will be equal to "i * 2" from
    //the onPlayerInteractBlockFireBall() method
}

Answer 2

您将开始使用Scheduler Programming。仔细查看教程的this part。

为此需要重复任务：

首先，创建一个扩展BukkitRunnable。
然后覆盖Runnable.run()方法：每次迭代将调用一次。
现在使用BukkitRunnable.runTaskTimer(Plugin, long, long)启动任务。
您可以随时使用BukkitRunnable.cancel()停止播放。

你可以实现这样的功能：

List<Block> blocks; // The target blocks
BukkitRunnable task = new MagmaEffect(blocks);
Plugin main; // The unique instance of the main class
task.runTaskTimer(main, 0L, 2L);

public class MagmaEffect extends BukkitRunnable {
    private List<Block> blocks;
    public MagmaEffect(List<Block> blocks) {
        this.blocks = blocks;
    }
    private int index;
    @Override
    public void run() {
        Block block = blocks.get(index);
        block.getWorld().playEffect(block.getLocation(), Effect.MOBSPAWNER_FLAMES, 5);
        index++;
        if (index == blocks.size()) {
            cancel();
        }
    }
}

你如何在bukkit中使用ticks？

2 个答案: