靜態unSet the attributions of the source.
Attributions.
Can be passed as string, Array<string>, {@link ol.Attribution},
Array<{@link ol.Attribution}> or undefined.
Listen for a certain type of event.
The event type or array of event types.
The listener function.
可選opt_this: ObjectThe object to use as this in listener.
Unique key for the listener. If called with an array of event types as the first argument, the return will be an array of keys.
Listen once for a certain type of event.
The event type or array of event types.
The listener function.
可選opt_this: ObjectThe object to use as this in listener.
Unique key for the listener. If called with an array of event types as the first argument, the return will be an array of keys.
函數Removes an event listener using the key returned by on() or once().
Note that using the ol.Observable.unByKey static function is to
be preferred.
Single image source options.
Classdesc
Abstract base class; normally only used for creating subclasses and not instantiated in apps. Base class for sources providing a single image.
參數: options
Single image source options.
Api