我有一系列数组,我正在使用jquery循环一个接一个地显示。
现在我想在用户点击“立即停止”按钮时停止它。
HTML:
<h1>Lorem ipsumd dolor sit amet.</h1>
<div id="div1">Answer One</div>
<div class="stop">
<button>Stop it Now.</button>
</div>
CSS:
body{text-align:center;}
h1{padding:30px; margin:0 0 0 30px;}
#div1{padding:20px;margin-top:0; text-align:center;}
的jQuery
$(document).ready(function() {
var items = ["Answer Two", "Answer Three", "Answer Four", "Answer Five", "Answer Six", "Answer One"],
$text = $( '#div1' ),
delay = .2; //seconds
function loop ( delay ) {
$.each( items, function ( i, elm ){
$text.delay( delay*1E3).hide();
$text.queue(function(){
$text.html( items[i] );
$text.dequeue();
});
$text.show();
$text.queue(function(){
if ( i == items.length -1 ) {
loop(delay);
}
$text.dequeue();
});
});
}
loop( delay );
});
我怎样才能做到这一点?
答案 0 :(得分:3)
一种解决方案是使用.stop(true, false)
。执行此操作将清除队列,而不执行挂起的功能。
[cancelButton addConstraint:[NSLayoutConstraint constraintWithItem:cancelButton
attribute:NSLayoutAttributeWidth
relatedBy:NSLayoutRelationEqual
toItem:nil
attribute:NSLayoutAttributeNotAnAttribute
multiplier:1.0
constant:80.0]];
[cancelButton addConstraint:[NSLayoutConstraint constraintWithItem:cancelButton
attribute:NSLayoutAttributeHeight
relatedBy:NSLayoutRelationEqual
toItem:nil
attribute:NSLayoutAttributeNotAnAttribute
multiplier:1.0
constant:80.0]];
答案 1 :(得分:0)
使用旗帜。试试这个:
# Change outside parens to brackets, [], for list comp
hnd = (function_f(x, model) for x in list_value)
答案 2 :(得分:0)
如果更改用于实现计时器的逻辑,它会使代码更简单,也意味着您只需在计时器上调用clearInterval
即可停止文本更改。试试这个:
$(document).ready(function() {
var items = ["Answer Two", "Answer Three", "Answer Four", "Answer Five", "Answer Six", "Answer One"],
$text = $('#div1'),
delay = 200, // miliseconds
itemIndex = 0;
var interval = setInterval(function() {
$text.text(items[itemIndex % items.length]);
itemIndex++;
}, delay);
$('button').click(function() {
clearInterval(interval);
})
});
答案 3 :(得分:0)
我添加了一个名为&#34; stopLoop&#34;的参数。正被初始化为假。 单击按钮后,该参数变为true并停止循环。 这里:http://jsfiddle.net/fcLso5c9/9/
$(document).ready(function() {
var stopLoop = false;
$(&#34; button&#34;)。click(function(){stopLoop = true;}); var items = [&#34; Answer Two&#34;,&#34; Answer Three&#34;,&#34; Answer Four&#34;,&#34; Answer Five&#34;,&#34; Answer Six& #34;,&#34;回答一个&#34;], $ text = $(&#39;#div1&#39;), 延迟= .2; //秒
function loop ( delay ) {
if (stopLoop) return;
$.each( items, function ( i, elm ){
$text.delay( delay*1E3).hide();
$text.queue(function(){
$text.html( items[i] );
$text.dequeue();
});
$text.show();
$text.queue(function(){
if ( i == items.length -1 ) {
loop(delay);
}
$text.dequeue();
});
});
}
loop( delay );
});
您可以使用几乎相同的代码来启动/停止功能