我需要为元素分配id
属性,然后触发一个函数将使用这个唯一的id
。
HTML:
<div class="item-timeleft" data-bind="id: 'timer'+ID, init: zxcCountDown('timer'+ID, 'message', 20)">
</div>
使用Javascript:
var data = [];
var viewModel = {
item: ko.observableArray(data)
};
ko.applyBindings(viewModel);
$.ajax({
url: 'api/item/all',
dataType: 'json',
success: function (data) {
var item_array = [];
$.each(data, function (index, item) {
item_array[index] = item;
});
viewModel.item(item_array);
console.log(data);
}
});
其他javascript和自定义绑定:
ko.bindingHandlers.id = {
init: function (element, valueAccessor, allBindingsAccessor, viewModel) {
},
update: function (element, valueAccessor, allBindingsAccessor, viewModel) {
$(element).attr('id', valueAccessor());
}
};
function zxcCountDown(id, mess, secs, mins, hrs, days) {
var obj = document.getElementById(id);
alert(obj.id);
var oop = obj.oop;
if (!oop) obj.oop = new zxcCountDownOOP(obj, mess, secs, mins, hrs, days);
else {
clearTimeout(oop.to);
oop.mess = mess;
oop.mhd = [mins, hrs, days];
oop.srt = new Date().getTime();
oop.fin = new Date().getTime() + ((days || 0) * 86400) + ((hrs || 0) * 3600) + ((mins || 0) * 60) + ((secs || 0));
oop.end = ((oop.fin - oop.srt));
oop.to = null;
oop.cng();
}
}
当我在控制台中重新触发它时,函数工作正常,但不知怎的,我无法弄清楚如何分配id,然后才触发函数。
答案 0 :(得分:3)
您可以使用attr绑定来设置项目的ID。 attr:{&#39; id&#39; :&#39; TIMER _&#39; + id()}
<span data-bind="delayInit : zxcCountDown , pId : 'TIMER_'+id() , pMessage : 'Hello' , pSecond : 3 , attr:{ 'id' : 'TIMER_'+id()} , text : 'DEMO'"></span>
然后定义一个delayInit绑定,确保在设置了id值后调用你的函数。它只需在SetTimeout函数内调用函数,延迟时间为0秒。
var viewModel = {
id : ko.observable(5) ,
zxcCountDown : function(id, mess, secs, mins, hrs, days) {
alert("MESSAGE : "+ mess+ "/ ID : "+id + "/ SECOND : " + secs);
alert("My item value :" + document.getElementById(id).textContent);
}
}
ko.bindingHandlers.delayInit = {
init: function (element, valueAccessor, allBindingsAccessor, viewModel) {
var allBindings = allBindingsAccessor() || {};
if(allBindings) {
setTimeout( function() {
valueAccessor()(allBindings.pId,allBindings.pMessage, allBindings.pSecond);
} , 0);
}
}
};
ko.applyBindings(viewModel);