我有这段代码,但当某人在我的网站上时,这些值可能会发生变化。我需要每隔30秒左右更新一次#finance div。可以这样做吗?
$(function() {
$.getJSON(
"http://query.yahooapis.com/v1/public/yql?q=select%20*%20from%20yahoo.finance.quotes%20where%20symbol%20in%20(%22%5EFTSE%22)%0A%09%09&format=json&env=http%3A%2F%2Fdatatables.org%2Falltables.env&callback=?",
function(json){
$('#finance').text(json.query.results.quote.Change);
// Patching payload into page element ID = "dog"
});
});
答案 0 :(得分:33)
您可以将代码放在一个单独的函数中:
function LoadFinance()
{
$(function() {
$.getJSON(
"http://query.yahooapis.com/v1/public/yql?q=select%20*%20from%20yahoo.finance.quotes%20where%20symbol%20in%20(%22%5EFTSE%22)%0A%09%09&format=json&env=http%3A%2F%2Fdatatables.org%2Falltables.env&callback=?",
function(json){ $('#finance').text(json.query.results.quote.Change);
// Patching payload into page element ID = "dog"
});
});
}
然后设置一个定时器,每隔30秒调用一次该函数:
setInterval( LoadFinance, 30000 );
祝你好运! ;)
答案 1 :(得分:18)
您可以按照以下间隔设置它:
$(function() {
function update() {
$.getJSON("http://query.yahooapis.com/v1/public/yql?q=select%20*%20from%20yahoo.finance.quotes%20where%20symbol%20in%20(%22%5EFTSE%22)%0A%09%09&format=json&env=http%3A%2F%2Fdatatables.org%2Falltables.env&callback=?",
function(json){
$('#finance').text(json.query.results.quote.Change);
});
}
setInterval(update, 30000);
update();
});
setInterval()
第一次在间隔后触发(例如,它在DOM加载后第一次运行30秒)...所以对于那个初始加载,你仍然需要调用它也会立即通过update()
。
答案 2 :(得分:3)
绝对:
setInterval(
function() {
$.getJSON(
"http://query.yahooapis.com/v1/public/yql?q=select%20*%20from%20yahoo.finance.quotes%20where%20symbol%20in%20(%22%5EFTSE%22)%0A%09%09&format=json&env=http%3A%2F%2Fdatatables.org%2Falltables.env&callback=?",
function(json){ $('#finance').text(json.query.results.quote.Change);
// Patching payload into page element ID = "dog" });
},
30000);