类 EventDispatcher

En

The EventDispatcher class is the base class for all classes that dispatch events.

Zh

EventDispatcher 类是可调度事件的所有类的基类。

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构造函数

constructor

方法

event hasListener off offAll offAllCaller on once

构造函数

constructor

方法

event

  • event(type: string, data?: any): boolean

    参数

    • type: string

      The type of event.

    • 可选data: any

      (Optional) Data to pass to the callback. If multiple parameters p1, p2, p3, ... need to be passed, use an array structure such as [p1, p2, p3, ...]. If a single parameter p needs to be passed and p is an array, use a structure such as [p]. For other single parameters p, you can directly pass parameter p. If data is Event.EMPTY, it means passing an Event object to the callback function. Note that it is not passing Event.TEMP, but an independent Event object.

    返回 boolean

    True if there are listeners for this event type, false otherwise.

    En

    Dispatch an event.

    Zh

    派发事件。

hasListener

  • hasListener(type: string): boolean

    参数

    • type: string

      The type of event.

    返回 boolean

    True if a listener of the specified type is registered, false otherwise.

    En

    Check if the EventDispatcher object has any listeners registered for a specific type of event.

    Zh

    检查 EventDispatcher 对象是否为特定事件类型注册了任何侦听器。

off

  • off(type: string, listener: Function): EventDispatcher

    参数

    • type: string

      The type of event.

    • listener: Function

      The listener function.

    返回 EventDispatcher

    This EventDispatcher object.

    En

    Remove a listener from the EventDispatcher object.

    Zh

    从 EventDispatcher 对象中删除侦听器。

  • off(
        type: string,
        caller: any,
        listener?: Function,
        args?: any[],
    ): EventDispatcher

    参数

    • type: string

      The type of event.

    • caller: any

      The execution scope of the event listener function.

    • 可选listener: Function

      The listener function.

    • 可选args: any[]

    返回 EventDispatcher

    This EventDispatcher object.

    En

    Remove a listener from the EventDispatcher object.

    Zh

    从 EventDispatcher 对象中删除侦听器。

offAll

  • offAll(type?: string): EventDispatcher

    参数

    • 可选type: string

      (Optional) The type of event. If the value is null, all types of listeners on this object are removed.

    返回 EventDispatcher

    This EventDispatcher object.

    En

    Remove all listeners of the specified event type from the EventDispatcher object.

    Zh

    从 EventDispatcher 对象中删除指定事件类型的所有侦听器。

offAllCaller

on

  • on(type: string, listener: Function): EventDispatcher

    参数

    • type: string

      The type of event.

    • listener: Function

      The listener function.

    返回 EventDispatcher

    This EventDispatcher object.

    En

    Register an event listener object with the EventDispatcher object so that the listener receives event notifications.

    Zh

    使用 EventDispatcher 对象注册指定类型的事件侦听器对象，以使侦听器能够接收事件通知。

  • on(type: string, caller: any, listener: Function, args?: any[]): EventDispatcher

    参数

    • type: string

      The type of event.

    • caller: any

      The execution scope of the event listener function.

    • listener: Function

      The listener function.

    • 可选args: any[]

      (Optional) The callback parameters of the event listener function.

    返回 EventDispatcher

    This EventDispatcher object.

    En

    Register an event listener object with the EventDispatcher object so that the listener receives event notifications.

    Zh

    使用 EventDispatcher 对象注册指定类型的事件侦听器对象，以使侦听器能够接收事件通知。

once

  • once(type: string, listener: Function): EventDispatcher

    参数

    • type: string

      The type of event.

    • listener: Function

      The listener function.

    返回 EventDispatcher

    This EventDispatcher object.

    En

    Register an event listener object with the EventDispatcher object so that the listener receives event notifications. This event listener responds once and is automatically removed after the first call.

    Zh

    使用 EventDispatcher 对象注册指定类型的事件侦听器对象，以使侦听器能够接收事件通知，此侦听事件响应一次后自动移除。

  • once(
        type: string,
        caller: any,
        listener: Function,
        args?: any[],
    ): EventDispatcher

    参数

    • type: string

      The type of event.

    • caller: any

      The execution scope of the event listener function.

    • listener: Function

      The listener function.

    • 可选args: any[]

      (Optional) The callback parameters of the event listener function.

    返回 EventDispatcher

    This EventDispatcher object.

    En

    Register an event listener object with the EventDispatcher object so that the listener receives event notifications. This event listener responds once and is automatically removed after the first call.

    Zh

    使用 EventDispatcher 对象注册指定类型的事件侦听器对象，以使侦听器能够接收事件通知，此侦听事件响应一次后自动移除。

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