JavaScript to achieve image sliding switch code examples to share
- 2021-01-22 04:54:04
- OfStack
Assuming that we have 1 to 55 bmp images, the core code to control image switching and display can be:
<script>
var i=1;
var img = new Array();
img[0] = "1.bmp";
img[1] = "2.bmp";
img[2] = "3.bmp";
img[3] = "4.bmp";
img[4] = "5.bmp";
function playImg(){
i=i+1;
var imgs = document.getElementById("img");
imgs.src =img[i];
if(i>=4){
i=1;
}
}
window.onload = function(){
document.getElementById("img").src="1.bmp";
}
</script>
<img id="img" src="" width="500" hieght="500" onclick="playImg()" style="cursor:pointer;">
Mainly reflects a picture switching control ideas, can be used in a variety of scenes, then let's look at a more complex implementation, can control the slide and pause events and other specific implementation of the slide switching effect of the picture example:
var $$ = function (id) {
return "string" == typeof id ? document.getElementById(id) : id;
};
var Extend = function(destination, source) {
for (var property in source) {
destination[property] = source[property];
}
return destination;
}
var CurrentStyle = function(element){
return element.currentStyle || document.defaultView.getComputedStyle(element, null);
}
var Bind = function(object, fun) {
var args = Array.prototype.slice.call(arguments).slice(2);
return function() {
return fun.apply(object, args.concat(Array.prototype.slice.call(arguments)));
}
}
var forEach = function(array, callback, thisObject){
if(array.forEach){
array.forEach(callback, thisObject);
}else{
for (var i = 0, len = array.length; i < len; i++) { callback.call(thisObject, array[i], i, array); }
}
}
var Tween = {
Quart: {
easeOut: function(t,b,c,d){
return -c * ((t=t/d-1)*t*t*t - 1) + b;
}
},
Back: {
easeOut: function(t,b,c,d,s){
if (s == undefined) s = 1.70158;
return c*((t=t/d-1)*t*((s+1)*t + s) + 1) + b;
}
},
Bounce: {
easeOut: function(t,b,c,d){
if ((t/=d) < (1/2.75)) {
return c*(7.5625*t*t) + b;
} else if (t < (2/2.75)) {
return c*(7.5625*(t-=(1.5/2.75))*t + .75) + b;
} else if (t < (2.5/2.75)) {
return c*(7.5625*(t-=(2.25/2.75))*t + .9375) + b;
} else {
return c*(7.5625*(t-=(2.625/2.75))*t + .984375) + b;
}
}
}
}
// Container object , Moving object , The number of switch
var SlideTrans = function(container, slider, count, options) {
this._slider =
(slider);this.container=
(container);// Container object
this._timer = null;// The timer
this._count = Math.abs(count);// The number of switch
this._target = 0;// The target
this._t = this._b = this._c = 0;//tween parameter
this.Index = 0;// The current index
this.SetOptions(options);
this.Auto = !!this.options.Auto;
this.Duration = Math.abs(this.options.Duration);
this.Time = Math.abs(this.options.Time);
this.Pause = Math.abs(this.options.Pause);
this.Tween = this.options.Tween;
this.onStart = this.options.onStart;
this.onFinish = this.options.onFinish;
var bVertical = !!this.options.Vertical;
this._css = bVertical ? "top" : "left";// The direction of
// The style is set
var p = CurrentStyle(this._container).position;
p == "relative" || p == "absolute" || (this._container.style.position = "relative");
this._container.style.overflow = "hidden";
this._slider.style.position = "absolute";
this.Change = this.options.Change ? this.options.Change :
this._slider[bVertical ? "offsetHeight" : "offsetWidth"] / this._count;
};
SlideTrans.prototype = {
// Setting Default Properties
SetOptions: function(options) {
this.options = {// The default value
Vertical: true,// Vertical or not (direction cannot be changed)
Auto: true,// Whether to automatically
Change: 0,// Change the amount
Duration: 30,// Slip duration
Time: 10,// Sliding time delay
Pause: 3000,// Pause time (Auto for true Effective when )
onStart: function(){},// Executed at the start of the transformation
onFinish: function(){},// Execute when the transformation is complete
Tween: Tween.Quart.easeOut//tween operator
};
Extend(this.options, options || {});
},
// Start switch
Run: function(index) {
// correction index
index == undefined && (index = this.Index);
index < 0 && (index = this._count - 1) || index >= this._count && (index = 0);
// Set the parameters
this._target = -Math.abs(this.Change) * (this.Index = index);
this._t = 0;
this._b = parseInt(CurrentStyle(this._slider)[this.options.Vertical ? "top" : "left"]);
this._c = this._target - this._b;
this.onStart();
this.Move();
},
// mobile
Move: function() {
clearTimeout(this._timer);
// Continue to move until target is reached or proceed to the next 1 Time slip
if (this._c && this._t < this.Duration) {
this.MoveTo(Math.round(this.Tween(this._t++, this._b, this._c, this.Duration)));
this._timer = setTimeout(Bind(this, this.Move), this.Time);
}else{
this.MoveTo(this._target);
this.Auto && (this._timer = setTimeout(Bind(this, this.Next), this.Pause));
}
},
// Move to the
MoveTo: function(i) {
this._slider.style[this._css] = i + "px";
},
// Under the 1 a
Next: function() {
this.Run(++this.Index);
},
// on 1 a
Previous: function() {
this.Run(--this.Index);
},
// stop
Stop: function() {
clearTimeout(this._timer); this.MoveTo(this._target);
}
};