我是jquery的新手并且一直在尝试编写一个简单的图像旋转器,它目前工作得很好,除非你点击“prev”按钮的“下一个”太多次很快就会破坏它图像旋转器。
这是html:
<div id="viewport">
<div id="imageContainer">
<div class="image" style="background-color:red;">
<div class="title"><p>This is the title of the post</p></div>
</div>
<div class="image" style="background-color:green;">
<div class="title"><p>This is the title of the post</p></div>
</div>
<div class="image" style="background-color:yellow;">
<div class="title"><p>This is the title of the post</p></div>
</div>
<div class="image" style="background-color:brown;">
<div class="title"><p>This is the title of the post</p></div>
</div>
<div class="image" style="background-color:purple;">
<div class="title"><p>This is the title of the post</p></div>
</div>
</div>
</div>
<input type="button" name="prev" id="prev" value="prev" />
<input type="button" name="next" id="next" value="next" />
和jquery:
var ic = $('#imageContainer');
var numItems = $('.image').size();
var position = 0;
ic.css('left', '0px');
var inter;
var rotateTimeout;
function rotate(){
inter = setInterval(function(){
if (position == (numItems - 1)) {
console.log(position);
$('.image').first().insertAfter($('.image').last());
ic.css('left', '+=400px');
position--;
}
ic.animate({opacity: 0.2, left: "-=400px"}, 1500, function(){
ic.animate({opacity: 1.0}, 1000);
});
position += 1;
}, 6000);
}
rotate();
$('#prev').click(function () {
console.log(position);
if (position == 0) {
$('.image').last().insertBefore($('.image').first());
ic.css('left', '-=400px');
position++;
}
ic.animate({
left: "+=400px"
});
position -= 1;
clearInterval(inter);
clearTimeout(rotateTimeout);
rotateTimeout = setTimeout(rotate, 10000);
});
$('#next').click(function () {
if (position == (numItems - 1)) {
console.log(position);
$('.image').first().insertAfter($('.image').last());
ic.css('left', '-400px');
position--;
}
ic.animate({
left: "-=400px"
});
position += 1;
clearInterval(inter);
clearTimeout(rotateTimeout);
rotateTimeout = setTimeout(rotate, 10000);
});
那么我怎样才能阻止用户过快点击按钮,或者只是每两秒钟点击一次以允许旋转器做它需要的东西?
答案 0 :(得分:1)
要限制功能调用频率,您可以使用一些“节流”功能。例如来自Underscore.js的_.throttle
或任何其他实现。没有必要使用整个库,只能从那里复制所需的功能。
事件处理程序附件如下所示:
$('#prev').click( _.throttle(function () { yours code... }, 2000) );