Членство в MFI не требуется для разработчиков программного обеспечения, оно необходимо только для разработчика аппаратного обеспечения.Кроме того, какой порт USB вы имеете в виду?Вы имеете в виду 32-контактный разъем iPhone?Вы всегда можете отправить данные на аппаратное устройство с помощью Bluetooth.
обновление 1 -
Прежде всего, извините, код может показаться сложным. Я вставляю это из моего текущего проекта.Оставьте комментарий, если вы хотите пример проекта.
сначала вам нужно зарегистрироваться для просмотра уведомлений. Load-
[[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];
Затем вы должны найти прилагаемые аксессуары -
_accessoryList = [[NSMutableArray alloc] initWithArray:[[EAAccessoryManager sharedAccessoryManager] connectedAccessories]];
Затем убедитесь, что это правильноаксессуар, который вы ищете -
for(EAAccessory *obj in _accessoryList)
{
if ([[obj protocolStrings] containsObject:@"com.bluebamboo.p25i"])//if find the accessory(p25) record it
{
[accessoryLabel setText:@"P25mi connected"]; // yup this is correct accessory!
[obj release];
break;
}
}
Затем откройте сеанс -
//if accessory not null
if(accessory)
{
session = [[EASession alloc] initWithAccessory:accessory forProtocol:@"com.bluebamboo.p25i"];//initial session that pair with protocol string
[[session outputStream] setDelegate:self];//set delegate class for output stream
[[session outputStream] scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode]; //set outputstream loop
[[session outputStream] open]; //open session
[[session inputStream] setDelegate:self];
[[session inputStream] open];
[[session inputStream] scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];
}
Тогда будет вызван потоковый делегат -
//this is a stream listener function that would actived by system while steam has any event
- (void)stream:(NSStream *)theStream handleEvent:(NSStreamEvent)streamEvent
{
switch(streamEvent)
{
case NSStreamEventOpenCompleted:
if(theStream==[session outputStream])//to identify which stream has been opend
{
[self addLabel:@"outputNSStream open;"];
}
else
{
[self addLabel:@"inputNSStream open:"];
}
break;
case NSStreamEventHasBytesAvailable:
//if system has stream data comes in
[self addLabel:@"receiving Data;"];
uint8_t buf2[100];//create a buffer
unsigned int len = 0;
//read buffer commands return actuall length of return data
len = [[session inputStream] read:buf2 maxLength:100];
if (len>0 )
{
if (buf2[4]==0x03&&buf2[5]==0x00)//if two bytes are 0x03 and 0x00, that means print success
{
//display success message
alertMessage = [[UIAlertView alloc] initWithTitle:@"SUCCESS:" message:@"P25i have printed Text successfully" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
[alertMessage show];
[alertMessage release];
[self addLabel:@"received success"];
}
}
[self enableButton];
//operation finished then close all streams and session
[[session outputStream] close];
[[session outputStream] removeFromRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];
[[session outputStream] setDelegate:nil];
[[session inputStream] close];
[[session inputStream] removeFromRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];
[[session inputStream] setDelegate:nil];
[session release];
session = nil;
//[self connectSession];
//switcher2=TRUE;
break;
case NSStreamEventHasSpaceAvailable:
[self addLabel:@" NSStreamEventHasSpaceAvailable"];
if (switcher2)//we send loop mode so application would keep sending data to p25, the switcher2 identify the data has send to P25m
{
//[self addLabel:@"buffer is selected"];
int contentLength=[printContent.text length];
unsigned char buffer[contentLength+7];
buffer[0] = 0X55;
buffer[1]=0x66;
buffer[2]=0x77;
buffer[3]=0x88;
buffer[4]=0x44;//print command
for (int i=5;i<contentLength+5;i++)//add print content
{
buffer[i] =[printContent.text characterAtIndex:i-5];
}
buffer[contentLength+5]=0x0A;
buffer[contentLength+6]=0x0A;
[[session outputStream] write:(const uint8_t *)buffer maxLength:contentLength+7];//send print package
switcher2 =FALSE;
}
break;
case NSStreamEventErrorOccurred:
alertMessage = [[UIAlertView alloc] initWithTitle:@"ERROR:" message:@"NSSTream Error" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
[alertMessage show];
[alertMessage release];
[self enableButton];
[self addLabel:@"NSSTream error"];
break;
default:
break;
}
}