EADemo的流程

EADemo是Apple提供的一個實現MFi的範例

它主要就是在使用EADSessionController這個Class，並且把它設定成singleton，讓程式能隨時呼叫它來做藍牙傳輸的訊息收發。

/*

@ 開始使用EADSessionController前的準備動作

*/

//先打開EAAccessoryManager的通知

//讓它能在Accessory連上與斷開時，能接到通知，觸發你要的function

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(_accessoryDidConnect:) name:EAAccessoryDidConnectNotification object:nil];

    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(_accessoryDidDisconnect:) name:EAAccessoryDidDisconnectNotification object:nil];

    [[EAAccessoryManager sharedAccessoryManager] registerForLocalNotifications];

//以singleton的模式呼叫EADSessionController

//讓它能在往後被程式所使用。

    _eaSessionController = [EADSessionController sharedController];

//用一個陣列去接目前己連線的Accessories

//讓它能在往後被使用。

    _accessoryList = [[NSMutableArray alloc] initWithArray:[[EAAccessoryManager sharedAccessoryManager] connectedAccessories]];

    if ([_accessoryList count] == 0) {

        //如果沒抓到已連接的裝置，執行這裡...

    } else {

        //如果有抓到已連接的裝置，執行這裡...

    }

/*

@ 實作接到connected / disconnected通知的function

*/

#pragma mark Internal

- (void)_accessoryDidConnect:(NSNotification *)notification {

    EAAccessory *connectedAccessory = [[notification userInfo] objectForKey:EAAccessoryKey];

    [_accessoryList addObject:connectedAccessory];

    if ([_accessoryList count] == 0) {

        [_noExternalAccessoriesPosterView setHidden:NO];

    } else {

        [_noExternalAccessoriesPosterView setHidden:YES];

    }

    NSIndexPath *indexPath = [NSIndexPath indexPathForRow:([_accessoryList count] - 1) inSection:0];

    [[self tableView] insertRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationLeft];

}

- (void)_accessoryDidDisconnect:(NSNotification *)notification {

    EAAccessory *disconnectedAccessory = [[notification userInfo] objectForKey:EAAccessoryKey];

    if (_selectedAccessory && [disconnectedAccessory connectionID] == [_selectedAccessory connectionID])

    {

        [_protocolSelectionActionSheet dismissWithClickedButtonIndex:-1 animated:YES];

    }

    int disconnectedAccessoryIndex = 0;

    for(EAAccessory *accessory in _accessoryList) {

        if ([disconnectedAccessory connectionID] == [accessory connectionID]) {

            break;

        }

        disconnectedAccessoryIndex++;

    }

    if (disconnectedAccessoryIndex < [_accessoryList count]) {

        [_accessoryList removeObjectAtIndex:disconnectedAccessoryIndex];

        NSIndexPath *indexPath = [NSIndexPath indexPathForRow:disconnectedAccessoryIndex inSection:0];

        [[self tableView] deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationRight];

} else {

        NSLog(@"could not find disconnected accessory in accessory list");

    }

    if ([_accessoryList count] == 0) {

        //如果沒抓到已連接的裝置，執行這裡...

    } else {

        //如果有抓到已連接的裝置，執行這裡...

    }

}

/*

@ 準備動作做完，實際使用EADSessionController的物件來傳送封包

*/

//

- (void)setupControllerForAccessory:(EAAccessory *)accessory withProtocolString:(NSString *)protocolString;

- (BOOL)openSession;

- (void)closeSession;

- (void)writeData:(NSData *)data;

- (NSUInteger)readBytesAvailable;

- (NSData *)readData:(NSUInteger)bytesToRead;