jquery slider with controls and automatic scrolling

问题

Basically I am just trying to do random jQuery stuff for educational purpose, and here is my very simple slider. I want it to work automatically and also with controls (little arrows to scroll to next/previous slider). The only problem that I have right now is that when you press the arrow, the function that automatically switches slides every 5 seconds is still counting these 5000 ms, so the next slide appears faster then desired. What I want is to make those arrows reset the timer, so you press the arrow -> next slide appears -> only after 5 seconds later the slide switches again. Sorry for sloppy explanation, hope I made it clear enough.

Here's the jsfiddle: http://jsfiddle.net/cA9aW/

and here is the code

HTML

<body>
<div id="wrapper">
    <header>
         <h1>Simplest Sliding Image Slider</h1>

    </header>
    <div id="content">
        <div id="slider_container">
            <div id="slider">
                <div class="slides" id="slide1">
                    <img src="http://s2.postimg.org/5uxqi0mgl/cats1.jpg" alt="" />
                </div>
                <div class="slides" id="slide2">
                    <img src="http://s2.postimg.org/66f6us2wl/cats2.jpg" alt="" />
                </div>
                <div class="slides" id="slide3">
                    <img src="http://s2.postimg.org/ai3sjs9th/cats3.jpg" alt="" />
                </div>
            </div>
        </div>
    </div>
    <footer></footer>
    </div>
</body>

jQuery(document).ready(function($) {

// start slider function
startSlider();

// set width and step variables and add active class to first slider
var slideWidth = $('.slides').width();
$('#slide1').addClass('slides active');

// actual function
function startSlider() {

looper = setInterval(function() {
  // remove and add class active
  $('.active').removeClass('active').next().addClass('active');

  // animation expression
  $('.active').animate({'left': '-=' + (slideWidth) + 'px'}, 500);
  $('.active').siblings().animate({'left': '-=' + (slideWidth) + 'px'}, 500);

  // return to first slide after the last one
  if($('.active').length == 0) {
    $('#slide1').addClass('active');
    $('.slides').animate({'left': 0}, 500);

  }
}, 5000); // interval


// adding controls
$('.slides').append("<div class='controls'><a class='control_left' href='#'></a><a class='control_right' href='#'></a></div>");

// remove unnecessary controlls on first and last slides
$('.slides:nth-child(1) a.control_left').remove();
$(".slides:nth-child(" + $('.slides').length + ") a.control_right").remove();

// add functionality to controls
$('.control_left').on('click', function() {
  $('.active').removeClass('active').prev().addClass('active');
  $('.active').animate({'left': '+=' + (slideWidth) + 'px'}, 500);
  $('.active').siblings().animate({'left': '+=' + (slideWidth) + 'px'}, 500);
});

$('.control_right').on('click', function() {
  $('.active').removeClass('active').next().addClass('active');
  $('.active').animate({'left': '-=' + (slideWidth) + 'px'}, 500);
  $('.active').siblings().animate({'left': '-=' + (slideWidth) + 'px'}, 500);
});



}

});

Thx a lot in advance

回答1:

What you need to do it to clear the interval in the button clicks and start interval again.

function resetInterval(){ //add this method which wil reset the timer
        window.clearInterval(looper); //clear current interval
        looper = setInterval(autoSlide, 5000); //start auto slide again.
}
function autoSlide(){ //move this to a function from being anonymous
        // remove and add class active
        $('.active').removeClass('active').next().addClass('active');
        // animation expression
        $('.active').animate({
            'left': '-=' + (slideWidth) + 'px'
        }, 500);
        $('.active').siblings().animate({
            'left': '-=' + (slideWidth) + 'px'
        }, 500);

        // return to first slide after the last one
        if ($('.active').length === 0) {
            $('#slide1').addClass('active');
            $('.slides').animate({
                'left': 0
            }, 500);
        }
}

and

 $('.control_left').on('click', function () {
        resetInterval(); //reset it
 ....

$('.control_right').on('click', function () {
        resetInterval(); //reset it
....

Demo

回答2:

LIVE DEMO

HTML:

<div id="gallery">
  <div id="slider">
     <div><img src="http://s2.postimg.org/5uxqi0mgl/cats1.jpg" alt=""></div>
     <div><img src="http://s2.postimg.org/66f6us2wl/cats2.jpg" alt=""></div>
     <div><img src="http://s2.postimg.org/ai3sjs9th/cats3.jpg" alt=""></div>
  </div>
  <span id="prev"></span>
  <span id="next"></span>
</div>

CSS:

#gallery{
  position:relative;
  margin: 0 auto;
  overflow:hidden;
  width:500px;
  height:278px;
}
#slider{
  position:absolute;
  left:0;
  height:278px;
}
#slider > div {
  position:relative;
  float:left;
  width:500px;
  height:278px;
}
#slider > div img{
  width:100%;
}
/* buttons */
#gallery > span{
  cursor:pointer;
  position:absolute;
  width:50px;
  height:100%;
  background:rgba(255,255,255,0.5);
  opacity:0.5;
}
#next{
  right:0px;
}
#gallery > span:hover{
  opacity:1;
}

jQ:

jQuery(function($) {

    var $gal = $('#gallery'),
        $sli = $('#slider'),
        $box = $('div',$sli),
        W    = $gal.width(), // 500
        N    = $box.length,  // 3
        C    = 0,            // a counter
        intv;

    $sli.width(W*N);


    $('#prev, #next').click(function(){
        C = (this.id=='next' ? ++C : --C) <0 ? N-1 : C%N;
        $sli.stop().animate({left: -C*W },800);  
    });

    function auto(){
      intv = setInterval(function(){
        $('#next').click();
      }, 3000);
    }
    auto(); // start

    $('#gallery').hover(function( e ){
      return e.type=='mouseenter'?clearInterval(intv):auto();
    });

});

来源：https://stackoverflow.com/questions/19068652/jquery-slider-with-controls-and-automatic-scrolling

标签

javascript

jquery

slider