TUIOfflinePushInfo offlinePushInfo = TUIOfflinePushInfo();
 offlinePushInfo.title = "Flutter TUICallKit";
 offlinePushInfo.desc = "This is an incoming call from Flutter TUICallkit";
 offlinePushInfo.ignoreIOSBadge = false;
 offlinePushInfo.iOSSound = "phone_ringing.mp3";
 offlinePushInfo.androidSound = "phone_ringing";
 offlinePushInfo.androidOPPOChannelID = "Flutter TUICallKit";
 offlinePushInfo.androidVIVOClassification = 1;
 offlinePushInfo.androidFCMChannelID = "fcm_push_channel";
 offlinePushInfo.androidHuaWeiCategory = "Flutter TUICallKit";
 offlinePushInfo.iOSPushType = TUICallIOSOfflinePushType.VoIP;

 TUICallParams params = TUICallParams(offlinePushInfo: offlinePushInfo);
  
 TUICallKit.instance.calls(['vince'], TUICallMediaType.audio, params);

#import <TUICallKit_Swift/TUICallKit_Swift-Swift.h>
#import <RTCRoomEngine/TUICallEngine.h>

- (TUICallParams *)getCallParams {
    TUIOfflinePushInfo *offlinePushInfo = [self createOfflinePushInfo];
    TUICallParams *callParams = [TUICallParams new];
    callParams.offlinePushInfo = offlinePushInfo;
    callParams.timeout = 30;
    return callParams;
}

- (TUIOfflinePushInfo *)createOfflinePushInfo {
    TUIOfflinePushInfo *pushInfo = [TUIOfflinePushInfo new];
    pushInfo.title = @"";
    pushInfo.desc = @"You have a new call";
    pushInfo.iOSPushType = TUICallIOSOfflinePushTypeVoIP;
    pushInfo.ignoreIOSBadge = NO;
    pushInfo.iOSSound = @"phone_ringing.mp3";
    pushInfo.AndroidSound = @"phone_ringing";
    // For OPPO, you must set the `ChannelID` to receive push messages. The `ChannelID` must be identical with that in the console.
    // OPPO must set a ChannelID to receive push messages. This channelID needs to be the same as the console.
    pushInfo.AndroidOPPOChannelID = @"tuikit";
    // FCM channel ID, you need change PrivateConstants.java and set "fcmPushChannelId"
    pushInfo.AndroidFCMChannelID = @"fcm_push_channel";
    // VIVO message type: 0-push message, 1-System message(have a higher delivery rate)
    pushInfo.AndroidVIVOClassification = 1;
    // HuaWei message type: https://developer.huawei.com/consumer/cn/doc/development/HMSCore-Guides/message-classification-0000001149358835
    pushInfo.AndroidHuaWeiCategory = @"IM";
    return pushInfo;
}

[[TUICallKit createInstance] calls:@[@"123456"]
                     callMediaType:TUICallMediaTypeAudio
                            params:[self getCallParams] succ:^{

} fail:^(int code, NSString * _Nullable errMsg) {

}];Objective-C