我发现一个解决方案,检测用户是否使用触摸板。它工作的很好,只有两个小缺点。
首先它会在第一次触发事件后检测到mousescroll,所以只需用鼠标滚轮单击一下即可。但这只是第一次。然后我们可以缓存导致第二个小问题的值。当用户有一个触控板和一个带轮子的鼠标时,它会检测先使用的任何东西。对我来说,这些问题可以忽略不计。这里的代码
var scrolling = false;
var oldTime = 0;
var newTime = 0;
var isTouchPad;
var eventCount = 0;
var eventCountStart;
var mouseHandle = function (evt) {
var isTouchPadDefined = isTouchPad || typeof isTouchPad !== "undefined";
console.log(isTouchPadDefined);
if (!isTouchPadDefined) {
if (eventCount === 0) {
eventCountStart = new Date().getTime();
}
eventCount++;
if (new Date().getTime() - eventCountStart > 50) {
if (eventCount > 5) {
isTouchPad = true;
} else {
isTouchPad = false;
}
isTouchPadDefined = true;
}
}
if (isTouchPadDefined) { // in this if-block you can do what you want
// i just wanted the direction, for swiping, so i have to prevent
// the multiple event calls to trigger multiple unwanted actions (trackpad)
if (!evt) evt = event;
var direction = (evt.detail<0 || evt.wheelDelta>0) ? 1 : -1;
if (isTouchPad) {
newTime = new Date().getTime();
if (!scrolling && newTime-oldTime > 550) {
scrolling = true;
if (direction < 0) {
// swipe down
} else {
// swipe up
}
setTimeout(function() {oldTime = new Date().getTime();scrolling = false}, 500);
}
} else {
if (direction < 0) {
// swipe down
} else {
// swipe up
}
}
}
}
document.addEventListener("mousewheel", mouseHandle, false);
document.addEventListener("DOMMouseScroll", mouseHandle, false);
https:// github。com/jnicol/trackpad-scroll-emulator,应该帮助原因':)' –
@Ethan Brown - 嗯就像我担心的那样 - 那么,得找一些其他的解决方案然后 - 是啊,我会明白:) – Cody
@Tats_innit - 酷! - 但不是我在找什么:) – Cody