html手指滑动滚动图片,H5+CSS3实现手指滑动切换图片

(function($){

functionmggScrollImg(box,config){this.box =$(box);this.config = $.extend({},config||{});this.width = this.config.width||this.box.children().eq(0).width();//一次滚动的宽度

this.size = this.config.size||this.box.children().length;this.loop = this.config.loop!==undefined ? (this.config.loop==true ? true : false) : true;//默认能循环滚动

this.auto =this.config.auto!==undefined ? (this.config.auto==true ? true : false) : true;//默认自动滚动

this.auto_wait_time = this.config.auto_wait_time||3000;//轮播间隔

this.scroll_time =this.config.scroll_time!==undefined?(this.config.scroll_time>0?this.config.scroll_time:0) : 300;//滚动时长

this.minleft = -this.width*(this.size-1);//最小left值，注意是负数[不循环情况下的值]

this.maxleft =0;//最大lfet值[不循环情况下的值]

this.now_left = 0;//初始位置信息[不循环情况下的值]

this.point_x = null;//记录一个x坐标

this.point_y = null;//记录一个y坐标

this.move_left = false;//记录向哪边滑动

this.index = 0;this.busy = false;this.timer;this.init();

}

$.extend(mggScrollImg.prototype,{

init :function(){this.bind_event();this.init_loop();this.auto_scroll();

},

bind_event :function(){var self = this;

self.box.bind('touchstart',function(e){var t=e.touches?e.touches:e.originalEvent.targetTouches;if(t.length==1 && !self.busy){

self.point_x= t[0].screenX;

self.point_y= t[0].screenY;

}

}).bind('touchmove',function(e){var t=e.touches?e.touches:e.originalEvent.targetTouches;if(t.length==1 && !self.busy){return self.move(t[0].screenX,t[0].screenY);//这里根据返回值觉得是否阻止默认touch事件

}

}).bind('touchend',function(e){!self.busy &&self.move_end();

});

},init_loop :function(){if(this.box.children().length>1 && this.box.children().length == this.size && this.loop){//暂时只支持size和子节点数相等情况的循环

this.now_left = -this.width;//设置初始位置信息

this.minleft = -this.width*this.size;//最小left值

this.maxleft = -this.width;this.box.prepend(this.box.children().eq(this.size-1).clone()).append(this.box.children().eq(1).clone()).css(this.get_style(2));this.box.css('width',this.width*(this.size+2));

}else{this.loop = false;this.box.css('width',this.width*this.size);

}

},

auto_scroll :function(){//自动滚动

var self = this;if(!self.auto)return;

clearTimeout(self.timer);

self.timer= setTimeout(function(){

self.go_index(self.index+1);

},self.auto_wait_time);

},

go_index :function(ind){//滚动到指定索引页面

var self = this;if(self.busy)return;

clearTimeout(self.timer);

self.busy= true;if(self.loop){//如果循环

ind = ind<0?-1:ind;

ind= ind>self.size?self.size:ind;

}else{

ind= ind<0?0:ind;

ind= ind>=self.size?(self.size-1):ind;

}if(!self.loop && (self.now_left == -(self.width*ind))){

self.complete(ind);

}else if(self.loop && (self.now_left == -self.width*(ind+1))){

self.complete(ind);

}else{if(ind == -1 || ind == self.size){//循环滚动边界

self.index = ind==-1?(self.size-1):0;

self.now_left= ind==-1?0:-self.width*(self.size+1);

}else{

self.index=ind;

self.now_left= -(self.width*(self.index+(self.loop?1:0)));

}

self.box.css(this.get_style(1));

setTimeout(function(){

self.complete(ind);

},self.scroll_time);

}

},

complete :function(ind){//动画完成回调

var self = this;

self.busy= false;

self.config.callback&&self.config.callback(self.index);if(ind==-1){

self.now_left=self.minleft;

}else if(ind==self.size){

self.now_left=self.maxleft;

}

self.box.css(this.get_style(2));

self.auto_scroll();

},

next :function(){//下一页滚动

if(!this.busy){this.go_index(this.index+1);

}

},

prev :function(){//上一页滚动

if(!this.busy){this.go_index(this.index-1);

}

},

move :function(point_x,point_y){//滑动屏幕处理函数

var changeX = point_x - (this.point_x===null?point_x:this.point_x),

changeY= point_y - (this.point_y===null?point_y:this.point_y),

marginleft= this.now_left, return_value = false,

sin=changeY/Math.sqrt(changeX*changeX+changeY*changeY);

this.now_left = marginleft+changeX;this.move_left = changeX<0;if(sin>Math.sin(Math.PI/3) || sin

return_value = true;//不阻止默认行为

}this.point_x =point_x;this.point_y =point_y;this.box.css(this.get_style(2));returnreturn_value;

},

move_end :function(){var changeX = this.now_left%this.width,ind;if(this.now_left<this.minleft){//手指向左滑动

ind = this.index +1;

}else if(this.now_left>this.maxleft){//手指向右滑动

ind = this.index-1;

}else if(changeX!=0){if(this.move_left){//手指向左滑动

ind = this.index+1;

}else{//手指向右滑动

ind = this.index-1;

}

}else{

ind= this.index;

}this.point_x = this.point_y = null;this.go_index(ind);

},get_style :function(fig){var x = this.now_left ,

time= fig==1?this.scroll_time:0;return{'-webkit-transition':'-webkit-transform '+time+'ms','-webkit-transform':'translate3d('+x+'px,0,0)','-webkit-backface-visibility': 'hidden','transition':'transform '+time+'ms','transform':'translate3d('+x+'px,0,0)'};

}

});$.mggScrollImg= function(box,config){var scrollImg = newmggScrollImg(box,config);return {//对外提供接口

next : function(){scrollImg.next();},

prev :function(){scrollImg.prev();},

go :function(ind){scrollImg.go_index(parseInt(ind)||0);}

}

}

})(jQuery)