CSS+jQueryスライドの実装例の詳細
HTML部分コード
Start with having a wrapping container div called main_view , and two sections nested inside called image_reel and paging. The image_reel will contain the sliding images, and paging contains the paging controls. Take a look at the image below for a visual.
<div class="main_view">
<div class="window">
<div class="image_reel">
<a href="#"><img src="reel_1.jpg" alt="" /></a>
<a href="#"><img src="reel_2.jpg" alt="" /></a>
<a href="#"><img src="reel_3.jpg" alt="" /></a>
<a href="#"><img src="reel_4.jpg" alt="" /></a>
</div>
</div>
<div class="paging">
<a href="#" rel="1">1</a>
<a href="#" rel="2">2</a>
<a href="#" rel="3">3</a>
<a href="#" rel="4">4</a>
</div>
</div>css+jQueryスライドインスタンスの実装チュートリアル
CSS部分コード
Take a look at the comments below for an explanation of the styles.
/*--Main Container--*/
.main_view {
float: left;
position: relative;
}
/*--Window/Masking Styles--*/
.window {
height:286px; width: 790px;
overflow: hidden; /*--Hides anything outside of the set width/height--*/
position: relative;
}
.image_reel {
position: absolute;
top: 0; left: 0;
}
.image_reel img {float: left;}
/*--Paging Styles--*/
.paging {
position: absolute;
bottom: 40px; right: -7px;
width: 178px; height:47px;
z-index: 100; /*--Assures the paging stays on the top layer--*/
text-align: center;
line-height: 40px;
background: url(paging_bg2.png) no-repeat;
display: none; /*--Hidden by default, will be later shown with jQuery--*/
}
.paging a {
padding: 5px;
text-decoration: none;
color: #fff;
}
.paging a.active {
font-weight: bold;
background: #920000;
border: 1px solid #610000;
-moz-border-radius: 3px;
-khtml-border-radius: 3px;
-webkit-border-radius: 3px;
}
.paging a:hover {font-weight: bold;} JS部分コード
The following script contains comments explaining which jQuery actions are being performed.1.Setting up the Image Slider Start by showing the paging and activating the first link. Then we will calculate and adjust the width of the image_reel according to how many slides there are.
//Show the paging and activate its first link
$(".paging").show();
$(".paging a:first").addClass("active");
//Get size of the image, how many images there are, then determin the size of the image reel.
var imageWidth = $(".window").width();
var imageSum = $(".image_reel img").size();
var imageReelWidth = imageWidth * imageSum;
//Adjust the image reel to its new size
$(".image_reel").css({'width' : imageReelWidth}); 2.Setting up the Slider Function and Timer We first create the function for the slide event by itself (rotate ). Then create another function (rotateSwitch ) that will rotate and repeat that slide event (rotate).
//Paging and Slider Function
rotate = function(){
var triggerID = $active.attr("rel") - 1; //Get number of times to slide
var image_reelPosition = triggerID * imageWidth; //Determines the distance the image reel needs to slide
$(".paging a").removeClass('active'); //Remove all active class
$active.addClass('active'); //Add active class (the $active is declared in the rotateSwitch function)
//Slider Animation
$(".image_reel").animate({
left: -image_reelPosition
}, 500 );
};
//Rotation and Timing Event
rotateSwitch = function(){
play = setInterval(function(){ //Set timer - this will repeat itself every 7 seconds
$active = $('.paging a.active').next(); //Move to the next paging
if ( $active.length === 0) { //If paging reaches the end...
$active = $('.paging a:first'); //go back to first
}
rotate(); //Trigger the paging and slider function
}, 7000); //Timer speed in milliseconds (7 seconds)
};
rotateSwitch(); //Run function on launch Take a look at this tutorial for an explanation of how the timer (setInterval ) works.
3.Hover and Click Events In case the user wants to view the slide for a longer period of time, we will allow the slider to stop when it is hovered. Another thing to consider is we should reset the timer each time the paging is clicked. This will prevent unexpected slide switches and allow for a smoother experience.
//On Hover
$(".image_reel a").hover(function() {
clearInterval(play); //Stop the rotation
}, function() {
rotateSwitch(); //Resume rotation timer
});
//On Click
$(".paging a").click(function() {
$active = $(this); //Activate the clicked paging
//Reset Timer
clearInterval(play); //Stop the rotation
rotateSwitch(); // Resume rotation timer
rotate(); //Trigger rotation immediately
return false; //Prevent browser jump to link anchor
}); css+jQueryスライドインスタンスの実装チュートリアル
プレゼンテーションの表示
Webサイトの例
Below are some sites that use similar techniques, check them out for inspiration!
スライド効果をフェードアウトする
まず、5枚のimgを含むDIVを構築します.主なcss部分のコードは以下の通りです.
#slider1{
margin:20px auto;
height:240px;
width:740px;
position:relative;
}
#slider1 img{
position: absolute;
top: 0px;
left: 0px;
display:none;
} 原理分析:一定時間間隔を置いて次の画像のz-indexを変更し、フェードアウトのスライド効果を実現し、具体的なjs部分コードは以下の通りである.
var now=0;
setInterval(function (){
pre=now===0?2:now-1;
nxt=now===4?0:now+1;
var div=$("#slider1").children();
div.eq(now).fadeOut(0,function(){
div.css('z-index',1);
div.eq(nxt).css("z-index",6).fadeIn(600);
div.eq(pre).css("z-index",4);
div.eq(now).css("z-index",5);
now=nxt;
});
},3000);スライド効果をスクロール
2つのDIVが確立され、IDはslider 2とchildren、slider 2は親div、childrenは子DIVであり、5枚のimgを含み、親DIV(slider 2)はoverflow:hiddenに設定される.主なCSS部分は以下の通りである.
#slider2{
overflow:hidden;
margin:20px auto;
height:240px;
width:740px;
position:relative;
}
#children img{
width:740px;
height:240px;
margin:0;
padding:0;
float:left;
}
#children{
height:240px;
position:relative;
width:740px;
}原理分析:一定時間間隔を置いて、画像の絶対位置を変更し、時間スクロールアニメーションのスライドコード、具体的なjs部分コードは以下の通りである.
var slider=1;
setInterval(function(){
slider=slider===5?0:slider;
var t=-slider*240;
slider++;
$("#children").animate({top:t},600);
},3000); プログラムプレゼンテーションアドレス:http://www.js8.in/mywork/jquery_slider/