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);
 }
};


Related articles: