我有一个自动运行的幻灯片代码，我想要的只是在单击图像时停止计时器，并在将鼠标悬停在图像上时暂停它。
我尝试了clearinterval功能，但它根本不起作用，所以我需要你的帮助。
这是 JavaScript 代码：
var m3D = function() {
var e = 4;
var t = [],
n, r, i, s, o,
u = "",
a = "",
f = {
x: 0,
y: 0,
z: -650,
s: 0,
fov: 500
},
l = 0,
c = 0;
f.setTarget = function(e, t, n) {
if (Math.abs(t - e) > .1) {
f.s = 1;
f.p = 0;
f.d = t - e;
if (n) {
f.d *= 2;
f.p = 9
}
}
};
f.tween = function(e) {
if (f.s != 0) {
f.p += f.s;
f[e] += f.d * f.p * .01;
if (f.p == 10) f.s = -1;
else if (f.p == 0) f.s = 0
}
return f.s
};
var h = function(k, l, c, h, p) {
if (l) {
this.url = l.url;
this.title = l.title;
this.color = l.color;
this.isLoaded = false;
if (document.createElement("canvas").getContext) {
this.srcImg = new Image;
this.srcImg.src = u + l.src;
this.img = document.createElement("canvas");
this.canvas = true;
r.appendChild(this.img)
} else {
this.img = document.createElement("img");
this.img.src = u + l.src;
r.appendChild(this.img)
}
function v(e, t) {
return Math.floor(Math.random() * (t - e + 1)) + e
}
function m() {
var e = t.length;
var n = v(0, t.length);
l.src = u + "photo" + n + ".jpg";
if (f.s) return;
try {
if (t[n].canvas == true) {
f.tz = t[n].z - f.fov;
f.tx = t[n].x;
f.ty = t[n].y;
if (s) {
s.but.className = "button viewed";
s.img.className = "";
s.img.style.cursor = "pointer";
s.urlActive = false;
o.style.visibility = "hidden"
}
t[n].img.className = "button selected";
d(false);
s = t[n]
} else {}
} catch (r) {}
}
// this is the Interval timer
var g = setInterval(m, 6e3);
this.img.onclick = function()
{
/*
i want to reset the timer OR increase it when i click here
*/
alert("click");
if (f.s) return;
if (this.diapo.isLoaded) {
if (this.diapo.urlActive) {
top.location.href = this.diapo.url
} else {
f.tz = this.diapo.z - f.fov;
f.tx = this.diapo.x;
f.ty = this.diapo.y;
if (s) {
s.but.className = "button viewed";
s.img.className = "";
s.img.style.cursor = "pointer";
s.urlActive = false;
o.style.visibility = "hidden"
}
this.diapo.but.className = "button selected";
d(false);
s = this.diapo
}
}
};
this.but = document.createElement("div");
this.Img = document.createElement("Img");
this.but.className = "button";
this.Img.src = a + l.src;
this.but.appendChild(this.Img);
i.appendChild(this.but);
this.but.diapo = this;
this.Img.style.left = Math.round(this.but.offsetWidth * 1.2 * (k % e)) + "px";
this.Img.style.top = Math.round(this.but.offsetHeight * 1.2 * Math.floor(k / e)) + "px";
this.Img.style.zIndex = "50";
this.but.onclick = this.img.onclick;
n = this.img;
this.img.diapo = this;
this.zi = 25e3
} else {
this.img = document.createElement("div");
this.isLoaded = true;
this.img.className = "fog";
r.appendChild(this.img);
this.w = 300;
this.h = 300;
this.zi = 15e3
}
this.x = c;
this.y = h;
this.z = p;
this.css = this.img.style
};
h.prototype.anim = function() {
if (this.isLoaded) {
var e = this.x - f.x;
var t = this.y - f.y;
var n = this.z - f.z;
if (n < 20) n += 5e3;
var r = f.fov / n;
var i = this.w * r;
var s = this.h * r;
this.css.left = Math.round(l + e * r - i * .5) + "px";
this.css.top = Math.round(c + t * r - s * .5) + "px";
this.css.width = Math.round(i) + "px";
this.css.height = Math.round(s) + "px";
this.css.zIndex = this.zi - Math.round(n)
} else {
this.isLoaded = this.loading()
}
};
h.prototype.loading = function() {
if (this.canvas && this.srcImg.complete || this.img.complete) {
if (this.canvas) {
this.w = this.srcImg.width;
this.h = this.srcImg.height;
this.img.width = this.w;
this.img.height = this.h;
var e = this.img.getContext("2d");
e.drawImage(this.srcImg, 0, 0, this.w, this.h)
} else {
this.w = this.img.width;
this.h = this.img.height
}
this.but.className += " loaded";
return true
}
return false
};
var p = function() {
l = r.offsetWidth * .5;
c = r.offsetHeight * .5
};
var d = function(e) {
var n = 0,
r;
while (r = t[n++]) {
if (r.but) {
r.css.msInterpolationMode = e ? "bicubic" : "nearest-neighbor";
r.css.imageRendering = e ? "optimizeQuality" : "optimizeSpeed"
}
}
};
var v = function(e) {
r = document.getElementById("screen");
i = document.getElementById("bar");
o = document.getElementById("urlInfo");
p();
var n = 0,
s, u = e.length;
while (s = e[n++]) {
var a = 1e3 * (n % 4 - 1.5);
var f = Math.round(Math.random() * 4e3) - 2e3;
var l = n * (5e3 / u);
t.push(new h(n - 1, s, a, f, l));
var c = t.length - 1;
for (var d = 0; d < 3; d++) {
var a = Math.round(Math.random() * 4e3) - 2e3;
var f = Math.round(Math.random() * 4e3) - 2e3;
t.push(new h(c, null, a, f, l + 100))
}
/*
var d = t.length - 1;
for (var v = 0; v < 3; v++) {
var a = Math.round(Math.random() * 4e3) - 2e3;
var f = Math.round(Math.random() * 4e3) - 2e3;
t.push(new h(d, null, a, f, l + 100))
}
*/
}
m()
};
var m = function() {
if (f.tx) {
if (!f.s) f.setTarget(f.x, f.tx);
var e = f.tween("x");
if (!e) f.tx = 0
} else if (f.ty) {
if (!f.s) f.setTarget(f.y, f.ty);
var e = f.tween("y");
if (!e) f.ty = 0
} else if (f.tz) {
if (!f.s) f.setTarget(f.z, f.tz);
var e = f.tween("z");
if (!e) {
f.tz = 0;
d(true);
if (s.url) {
s.img.style.cursor = "pointer";
s.urlActive = true;
s.img.className = "href";
o.diapo = s;
o.onclick = s.img.onclick;
o.innerHTML = s.title || s.url;
o.style.visibility = "visible";
o.style.color = s.color || "#fff";
o.style.top = Math.round(s.img.offsetTop + s.img.offsetHeight - o.offsetHeight - 5) + "px";
o.style.left = Math.round(s.img.offsetLeft + s.img.offsetWidth - o.offsetWidth - 5) + "px"
} else {
s.img.style.cursor = "default"
}
/*
i want to pause the timer when i hover here
*/
s.img.onmouseover = function(){
alert("mouseover");
};
}
}
var n = 0,
r;
while (r = t[n++]) r.anim();
var g = setTimeout(m, 32)
};
return {
init: v
}
}()如您所见，在第 90 行，我有setInterval计时器功能，之后是需要"重置"计时器的onclick功能，在第 270 行是我需要"暂停"计时器的onmouseover函数。
那么如何做到这一点呢？
尝试使用标志变量。在文件顶部的某个位置添加var pauseSlideshow = false;，以便它将在全局范围内。更改m()函数，如下所示：
var m = function() {
if(!pauseSlideshow) {
/*
*
* all of the code already in m()
*
*/
} // make sure to add this additional curly brace
}
然后你需要一个onmouseover和一个onmouseout函数来切换pauseSlideshow，像这样：
s.img.onmouseover = function() {
pauseSlideshow = true;
};
s.img.onmouseout = function() {
pauseSlideshow = false;
};