我正在创建一个视差网站,但我正在使用我发现的一些很好的教程代码。 本教程附带了一些JS来改变一些精灵的滚动速度,使用标签"数据 - "但即使我已经拥有与背景相比具有不同滚动速度的精灵,我也无法根据自己的喜好修改此速度。
这是JavaScript代码:
$(document).ready(function(){
// Cache the Window object
$window = $(window);
// Cache the Y offset and the speed of each sprite
$('[data-type]').each(function() {
$(this).data('offsetY', parseInt($(this).attr('data-offsetY')));
$(this).data('Xposition', $(this).attr('data-Xposition'));
$(this).data('speed', $(this).attr('data-speed'));
});
// For each element that has a data-type attribute
$('section[data-type="background"]').each(function(){
// Store some variables based on where we are
var $self = $(this),
offsetCoords = $self.offset(),
topOffset = offsetCoords.top;
// When the window is scrolled...
$(window).scroll(function() {
// If this section is in view
if ( ($window.scrollTop() + $window.height()) > (topOffset) &&
( (topOffset + $self.height()) > $window.scrollTop() ) ) {
// Scroll the background at var speed
// the yPos is a negative value because we're scrolling it UP!
var yPos = -($window.scrollTop() / $self.data('speed'));
// If this element has a Y offset then add it on
if ($self.data('offsetY')) {
yPos += $self.data('offsetY');
}
// Put together our final background position
var coords = '50% '+ yPos + 'px';
// Move the background
$self.css({ backgroundPosition: coords });
// Check for other sprites in this section
$('[data-type="sprite"]', $self).each(function() {
// Cache the sprite
var $sprite = $(this);
// Use the same calculation to work out how far to scroll the sprite
var yPos = -($window.scrollTop() / $sprite.data('speed'));
var coords = $sprite.data('Xposition') + ' ' + (yPos + $sprite.data('offsetY')) + 'px';
$sprite.css({ backgroundPosition: coords });
}); // sprites
// Check for any Videos that need scrolling
$('[data-type="video"]', $self).each(function() {
// Cache the video
var $video = $(this);
// There's some repetition going on here, so
// feel free to tidy this section up.
var yPos = -($window.scrollTop() / $video.data('speed'));
var coords = (yPos + $video.data('offsetY')) + 'px';
$video.css({ top: coords });
}); // video
}; // in view
}); // window scroll
}); // each data-type
}); // document ready
这是单个精灵的HTML标记:
<div class="stars" data-type="sprite" data-speed="10">
<img class="star1" src="img/cenas/1.PNG">
</div>
我尝试更改数据速度值,但没有任何更改。如果不同的滚动速度有不同的精灵,我该怎么办?