macOS关键事件慢速重复 [英] macOS Key Event Slow Repeat

问题描述

我正在尝试在macOS中创建一个小型WASD演示游戏.我正在使用NSEvent来处理关键事件.要检测按键，我正在搜索keyDown事件.这就是我所拥有的:

I'm trying to create a small WASD demo game in macOS. I'm using NSEvent for handling the key events. To detect the key presses, I'm searching for keyDown events. Here's what I have:

    NSEvent.addLocalMonitorForEvents(matching: .keyDown) {
        (keyEvent) -> NSEvent? in
        if self.keyDown(with: keyEvent) {
            return nil
        } else {
            return keyEvent
        }
    }

func keyDown(with event: NSEvent) -> Bool {

    userInt.keyDown(key: event.characters)

    return true
}

因此，在这里，我按住了按键(就像您在游戏中所期望的那样)，并且动作缓慢.就像，当我按住它时，它非常简陋.经过进一步检查，我发现密钥重复间隔为0.1s，这是在我的系统偏好设置中设置的.这意味着它正在跳过帧.但是，在游戏中，我不希望此设置影响运动.那么，如何在按键重复间隔没有阻止的情况下检测按键保持事件 ?

So here, I'm holding the keys down (as you'd expect in a game), and I'm getting some very slow movement. Like, when I'm holding it down, it's very janky. Upon further inspection, I saw that the key repeat interval was 0.1s, which was set in my system preferences. This means that it's skipping frames. However, in a game, I don't want this setting to affect the movement. So how can I detect a key holding event without being held up by the key repeat interval?

推荐答案

您应该忽略按键重复事件(isARepeat为true).取而代之的是，当您收到按键事件时，启动一个计时器，该计时器会在您希望提高游戏状态的频率下触发.在该计时器的触发代码中推进游戏状态.当您收到按键事件时，请停止计时器.

You should ignore key-repeat events (with isARepeat true). Instead, when you get a key-down event, start a timer that fires however often you want to advance your game state. Advance the game state in that timer's firing code. When you get a key-up event, stop the timer.

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