Question

我是原型机制，允许其他模块订阅我们框架的主要事件，并使用与事件（约定）一起传递的延迟数组来控制逻辑流。

如果以下示例中有4个订阅事件的事件处理程序，如果其中一个延迟被拒绝，则整个机制应终止执行。
目前为了防止事件处理程序（插入模块）执行我在每个处理程序的顶部检查是否

!$.grep(options.deferredArray,function(item){return item.state() == "rejected" }) == 0;
            if (hasRejected) return false;

一旦事件被解雇，即使我$.unbind('OnPreRender')所有4名处理程序仍然会被解雇。在OnPreRender发生后，有没有办法防止这种情况发生？

JSFiddle

var globalDeferred = $.Deferred(function(){setTimeout(function(){ console.log('%cglobal deferred','color : blue');}, 0)});
    var deferredArray = [globalDeferred.promise()];
     dataRoles.on('OnPreRender', function (e, options) {
     var hasRejected = !$.grep(options.deferredArray,function(item){return item.state() == "rejected" }) == 0;
        if (hasRejected) return false;
        var d = $.Deferred();
        options.deferredArray.push(d.promise());
        var rand = Math.floor(Math.random()*1000);
        setTimeout(function(){
        console.log("(1) in "+rand+" ms");
            d.resolve();
        },rand);
        return $.grep(options.deferredArray,function(item){return item.state() == "rejected" }) == 0;
        });

        dataRoles.on('OnPreRender', function (e, options) {
        var hasRejected = !$.grep(options.deferredArray,function(item){return item.state() == "rejected" }) == 0;
        if (hasRejected) return false;
        var d = $.Deferred();
        options.deferredArray.push(d.promise());
        var rand = Math.floor(Math.random()*1000);
        setTimeout(function(){
        console.log("(2) in "+rand+" ms");
            d.reject();
        },rand);
        });

        dataRoles.on('OnPreRender', function (e, options) {
        var hasRejected = !$.grep(options.deferredArray,function(item){return item.state() == "rejected" }) == 0;
        if (hasRejected) return false;
        var d = $.Deferred();
        options.deferredArray.push(d.promise());
        var rand = Math.floor(Math.random()*1000);
        setTimeout(function(){
        console.log("(3) in "+rand+" ms");
            d.resolve();
        },rand);
        });

        dataRoles.on('OnPreRender', function (e, options) {
        var hasRejected = !$.grep(options.deferredArray,function(item){return item.state() == "rejected" }) == 0;
        if (hasRejected) return false;
        var d = $.Deferred();
        options.deferredArray.push(d.promise());
        var rand = Math.floor(Math.random()*1000);
        setTimeout(function(){
        console.log("(4) in "+rand+" ms");
            d.resolve();
        },rand);
        return $.grep(options.deferredArray,function(item){return item.state() == "rejected" }) == 0;
        });

        globalDeferred.reject();
        $.when.apply($, deferredArray).then(function () {
            console.log('%csuccess','color : green');
                },function () {
            console.log("%cfail","color : red");
                });
        dataRoles.trigger('OnPreRender', { deferredArray :  deferredArray});

Answer 1

这将解决您的问题。你可以用这个

替换你的解开/关闭

e.stopImmediatePropagation();

jsfiddle：http://jsfiddle.net/Grimbode/Qxm2Y/2/

一旦事件被触发，即使我`$ .unbind（'event'）`所有处理程序都会触发。事件发生后，有没有办法防止事件处理程序触发？

1 个答案: