sharedInstance static method
创建一个 TRTCCloud
单例,用于实现进房、预览、推流、拉流等功能
Implementation
static Future<TRTCCloud?> sharedInstance() async {
if (_trtcCloud == null) {
_trtcCloud = new TRTCCloud();
await _cloudChannel.invokeMethod('sharedInstance');
}
return _trtcCloud;
}