JavaScript 图片滑动切换效果

| 37 | Code | WWW javascript

来源页面:http://www.blueidea.com/tech/web/2009/7031.asp

个人对其中的脚本进行了提取,只保留了横向切换效果(但有冗余代码)(注销了代码147行)

简要说明

this.Change是图片切换的宽度,但由于原生的计算有些问题,this.Change=224是我手动加上去的。(84行)
因为我个人在图片上给的样式宽度是224
源码:

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
var $ = function (id) {
    return "string" == typeof id ? document.getElementById(id) : id;
};   
console.log("run");
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 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;
            }   
        }   
    }   
}   
  
  
//容器对象,滑动对象,切换数量
var SlideTrans = function(container, slider, count, options) {
    this._slider = $(slider);
    this._container = $(container);//容器对象
    this._timer = null;//定时器
    this._count = Math.abs(count);//切换数量
    this._target = 0;//目标值
    this._t = this._b = this._c = 0;//tween参数
       
    this.Index = 0;//当前索引
       
    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";//方向
       
    //样式设置
    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;
        this.Change=224;
};   
SlideTrans.prototype = {   
  //设置默认属性
  SetOptions: function(options) {
    this.options = {//默认值
        Vertical:   true,//是否垂直方向(方向不能改)
        Auto:       true,//是否自动
        Change:     0,//改变量
        Duration:   50,//滑动持续时间
        Time:       10,//滑动延时
        Pause:      2000,//停顿时间(Auto为true时有效)
        onStart:    function(){},//开始转换时执行
        onFinish:   function(){},//完成转换时执行
        Tween:      Tween.Quart.easeOut//tween算子
    };   
    Extend(this.options, options || {});
  },   
  //开始切换
  Run: function(index) {
    //修正index
    index == undefined && (index = this.Index);
    index < 0 && (index = this._count - 1) || index >= this._count && (index = 0);
    //设置参数
    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();
  },   
  //移动
  Move: function() {
    clearTimeout(this._timer);
    //未到达目标继续移动否则进行下一次滑动
    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));
    }   
  },   
  //移动到
  MoveTo: function(i) {
    this._slider.style[this._css] = i + "px";
  },   
  //下一个
  Next: function() {
    this.Run(++this.Index);
  },   
  //上一个
  Previous: function() {
    this.Run(--this.Index);
  },   
  //停止
  Stop: function() {
    clearTimeout(this._timer); this.MoveTo(this._target);
  }   
};   
  
  
//new SlideTrans("idContainer", "idSlider", 3).Run();
  
///////////////////////////////////////////////////////////
  
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 st = new SlideTrans("idContainer2", "idSlider2", 7, { Vertical: false });
  
var nums = [];
//插入数字
for(var i = 0, n = st._count - 1; i <= n;){
    (nums[i] = $("idNum").appendChild(document.createElement("li"))).innerHTML = ++i;
}   
  
forEach(nums, function(o, i){
    o.onmouseover = function(){ o.className = "on"; st.Auto = false; st.Run(i); }
    o.onmouseout = function(){ o.className = ""; st.Auto = true; st.Run(); }
})   
  
//设置按钮样式
st.onStart = function(){
    forEach(nums, function(o, i){ o.className = st.Index == i ? "on" : ""; })
}   
  
/*$("idAuto").onclick = function(){  
    if(st.Auto){  
        st.Auto = false; st.Stop(); this.value = "自动";  
    }else{  
        st.Auto = true; st.Run(); this.value = "停止";  
    }  
}  
$("idNext").onclick = function(){ st.Next(); }  
$("idPre").onclick = function(){ st.Previous(); }  
 
$("idTween").onchange = function(){  
    switch (parseInt(this.value)){  
        case 2 :  
            st.Tween = Tween.Bounce.easeOut; break;  
        case 1 :  
            st.Tween = Tween.Back.easeOut; break;  
        default :  
            st.Tween = Tween.Quart.easeOut;  
    }  
}*/
  
  
st.Run();   
  
  var touchEvent ={
    startY : 0,   
    endY: 0,   
    ismove:0    
    }   
  
  document.querySelector('#idContainer2').addEventListener("touchstart",function(){
    touchEvent.startX=event.touches[0].pageX;   
    touchEvent.endX=touchEvent.startX;   
    touchEvent.ismove=0;   
    },false);
  
  document.querySelector('#idContainer2').addEventListener("touchmove",function(){
    touchEvent.ismove=1;   
    touchEvent.endX=event.touches[0].pageX;   
  },false);
  
  document.querySelector('#idContainer2').addEventListener("touchend",function(){
    document.querySelector('.show').style.opacity=1;
  
    if(touchEvent.ismove===1){
      if(touchEvent.endX>touchEvent.startX)st.Run(document.querySelector('.on').innerHTML);
         
      else if(touchEvent.endX<touchEvent.startX){
      }   
    }   
  },false);
  
  
  function hide(id){
    temp1=id.substring(0,id.length-1);   
    temp2=id.substring(id.length-1,id.length);   
    if(temp2==="b"){
        document.getElementById(temp1).style.display='none';
    }   
    else{
        for(i=1;i<7;i++){
            document.getElementById('hide'+i).style.display='none';
        }   
  
        document.getElementById(temp1).style.display='block';
    }   
}