如何断开与事件的连接

Question

我创建了一个 js 脚本，它订阅了两个不同的事件：

function testDoubleEvents() {
    alert("started");
    var eventName1 = "LeftBumperPressed";
    var eventName2 = "RightBumperPressed";

    session.service("ALMemory").done(function (ALMemory) {
        alert("ALMemory ok");
        ALMemory.subscriber(eventName1).done(function(subscriber1) {
            alert("subscribed1");
            subscriber1.signal.connect(function(result1){
                alert(eventName1);
            });
        });

        ALMemory.subscriber(eventName2).done(function(subscriber2) {
            alert("subscribed2");
            subscriber2.signal.connect(function(result2){
                alert(eventName2);
            });
        });

    });
}

第一次发生该事件时如何取消订阅？
如果其中一个事件是第一次发生，我如何取消订阅这两个事件？

Answer 1

这就够了吗？

alert("subscribed1");
        subscriber1.signal.connect(function(result1){
            alert(eventName1);
            subscriber1.signal.disconnect()
        });

http://doc.aldebaran.com/2-5/dev/js/index.html?highlight=javascript#signals

Answer 2

您需要使用连接 ID 调用断开连接，但您需要保留对所有这些订阅者和连接的引用。在这里，eventName1 将在第一次发生时断开连接，而 eventName2 将两者都断开连接。

function testDoubleEvents() {
    alert("started");
    var eventName1 = "LeftBumperPressed";
    var eventName2 = "RightBumperPressed";
    var subscriber1 = 0;
    var subscriber2 = 0;
    var connectionId1 = 0;
    var connectionId2 = 0;

    session.service("ALMemory").done(function (ALMemory) {
        alert("ALMemory ok");
        ALMemory.subscriber(eventName1).done(function(subscriber) {
            subscriber1 = subscriber;
            alert("subscribed1");
            subscriber1.signal.connect(function(result1){
                alert(eventName1);
                subscriber1.signal.disconnect(connectionId1);
            }).then(function(connection) { 
                connectionId1 = connection; 
            });
        });

        ALMemory.subscriber(eventName2).done(function(subscriber) {
            alert("subscribed2");
            subscriber2 = subscriber;
            subscriber2.signal.connect(function(result2){
                alert(eventName2);
                subscriber2.signal.disconnect(connectionId2);
                subscriber1.signal.disconnect(connectionId1);
            }).then(function(connection) { 
                connectionId2 = connection; 
            });
        });

    });
}

作为记录，文档在此处：http://doc.aldebaran.com/2-5/dev/js/index.html

如何断开与事件的连接

How to disconnect from events

javascript

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