滚动函数包含向上滚和向左滚

分手后的思念是犯贱 2022-10-11 01:11 120阅读 0赞

页面中的信息比较多时，需要让信息滚动起来，有的是向上滚有的是向左滚，以下是参考代码：

// 滚动函数 往上滚和往左滚
    	// opts = {go: 'left', obj: $('.scroll_left'), cons: 5, goTime: 1000, stopTime: 2000, dots: $('.con-dots span')}
    	// go:滚动方向top/left obj:滚动的容器，有超出隐藏的 cons:容器看到的个数 goTime:滚动的时间，毫秒 stopTime:停止的时间
    	// dots:滚动的序号按钮，所有的，要设置属性index从0开始（这个参数可不传）
    	// afterfun:滚动后的函数调用，参数为当前的索引 beforefun:滚动前的函数调用，参数是索引 （这两个函数可不传）
        function scrollFun(opts, afterfun, beforefun){ 
            var itemNum = opts.obj.find('li').length;
            var conH = opts.obj.innerHeight();
            var conW = opts.obj.innerWidth();
            var itemH = conH/opts.cons;
            var itemW = conW/opts.cons;
            var cur = 1;
            opts.obj.find('li').clone().appendTo(opts.obj.find('ul')).attr('mark', 'clone');
    
            // 上滚
            var toTop = function(){ 
            	if(typeof beforefun == 'function'){ 
            		beforefun(cur == itemNum? 0: cur);
            	}
                opts.obj.stop(true, true).animate({ 
                    scrollTop: itemH*cur+'px'
                }, opts.goTime, function(){ 
                	if(typeof afterfun == 'function'){ 
                		afterfun(cur == itemNum? 0: cur);
                	}
                	if(opts.dots)
                	opts.dots.eq(cur == itemNum? 0: cur).addClass('active').siblings().removeClass('active');
                    cur++;
                    if(cur > itemNum){ 
                        opts.obj.stop(true, true).scrollTop(0);
                        cur = 1;
                    }
                })
            }
            if(opts.go == 'top'){ 
                var timer = setInterval(toTop, opts.stopTime)
                opts.obj.on('mouseover', function(){ 
                	clearInterval(timer);
                })
                opts.obj.on('mouseout', function(){ 
                	timer = setInterval(toTop, opts.stopTime)
                })
                if(opts.dots){ 
                	opts.dots.on('mouseover', function(){ 
    	            	clearInterval(timer);
    	            	var index = $(this).attr('index');
    	            	cur = index == 0? itemNum : index;
    	            	toTop();
    	            })
    	            opts.dots.on('mouseout', function(){ 
    	            	timer = setInterval(toTop, opts.stopTime)
    	            })
                }
            }
    
            // 左滚
            var toLeft = function(){ 
            	if(typeof beforefun == 'function'){ 
            		beforefun(cur == itemNum? 0: cur);
            	}
                opts.obj.stop(true, true).animate({ 
                    scrollLeft: itemW*cur+'px'
                }, opts.goTime, function(){ 
                	if(typeof afterfun == 'function'){ 
                		afterfun(cur == itemNum? 0: cur);
                	}
                	if(opts.dots)
                	opts.dots.eq(cur == itemNum? 0: cur).addClass('active').siblings().removeClass('active');
                    cur++;
                    if(cur > itemNum){ 
                        opts.obj.stop(true, true).scrollLeft(0);
                        cur = 1;
                    }
                })
            }
            if(opts.go == 'left'){ 
                opts.obj.find('ul').css('width', itemW*itemNum*2+'px');
                var timer = setInterval(toLeft, opts.stopTime);
                opts.obj.on('mouseover', function(){ 
                	clearInterval(timer);
                })
                opts.obj.on('mouseout', function(){ 
                	timer = setInterval(toLeft, opts.stopTime)
                })
                if(opts.dots){ 
                	opts.dots.on('mouseover', function(){ 
    	            	clearInterval(timer);
    	            	var index = $(this).attr('index');
    	            	cur = index == 0? itemNum : index;
    	            	toLeft();
    	            })
    	            opts.dots.on('mouseout', function(){ 
    	            	timer = setInterval(toLeft, opts.stopTime)
    	            })
                }
            }
        }