注册
注册步骤在设备的系统中注册应用程序并返回注册 ID
import { Push, RegistrationEventResponse} from "ionic-native";
//the push element is created in the initialization example
push.on("registration", async (response: RegistrationEventResponse) => {
//The registration returns an id of the registration on your device
RegisterWithWebApi(response.registrationId);
});