Question

I am taking an object-oriented approach to building a Javascript app. For starters, I am creating a Game object and a Timer object.

Here s my current implementation: The Timer object has the following methods:

setTimerValue()  
start()  
stop()  
getTimeLeft()  
timeExpired()

The Game object has the following methods:

reset()
run()
...

Timer.start() uses window.setInterval() to start the countdown. When the countdown gets to zero, it calls Timer.timeExpired().

<代码>timer.timeExpired(>>宣布,游戏已经结束,应当打电话Game.reset(和Game.run(<>,以重新开始游戏。但是,如果时间客人不了解任何关于猎物的内容,如何做到这一点?

动物目标是否需要成为一种全球性的变数,才能发挥作用?

此外,目前,该动物物体的特性之一为时标。这使得狩猎者反对使用时间方法。但是,不清楚时间方法如何能把猎物称作猎物。

I have a nagging suspicion that I am creating too many dependencies between the objects and could use some suggestions on how to architect this better.

Thanks everyone.

Answer 1

Use an event driven approach or the observer design pattern. Javascript has one of the flexible event driven implementation from my experience. So you have the Timer object which doesn t really have to know about any other objects. When you call Timer.start(), the object should emit a custom event, like "timerStarted", likewise for the other methods:

Timer.stop() - > emits "timerStoped"
Timer.timeExpired() -> emits "timerExpired"

对于时方提出的每一项活动,都应当有一个活动手,当核心活动发生时,将叫作活动手。

如果你使用舱位,处理事件就应当小:

var $ = jQuery.noConflict();
var timer = new Timer();
var game  = new Game();

$(timer).bind( timerStarted , function(e) {
    game.doSomething();
});

时间:开始()

start: function() {
    $(this).trigger( timerStarted );
}

Another approach is using callbacks: If you want something to be done when the timer starts, you could pass a lambda function to the start method of the timer:

// timer method
start: function(callback) {
    if(typeof(callback) ==  function ) {
        callback();
    }
}

// main logic
var timer = new Timer();
var game  = new Game();

timer.start(function() {
    game.doSomething();
});

我希望你们会得到ide。

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