how to send images via bluetooth in iphone programming? - iphone

Question

I am some NSStrings, and I am just joining them and making a single NSString, then I am converting that single NSString to NSData and sending via bluetooth to other iphone
but now I have to send image with above data,
how can I achieve such concept ?
but I want to send single NSData (UIImage+NSString), how can I ????

Answer 1

a tutorial on how to program Bluetooth data transfer on the iPhone is here:
http://www.devx.com/wireless/Article/43502/1954
The essential part you're looking for is here:
-(IBAction) btnSend:(id) sender
{
//---convert an NSString object to NSData---
NSData* data;
NSString *str = [NSString stringWithString:txtMessage.text];
data = [str dataUsingEncoding: NSASCIIStringEncoding];
[self mySendDataToPeers:data];
}
- (void) mySendDataToPeers:(NSData *) data
{
if (currentSession)
[self.currentSession sendDataToAllPeers:data
withDataMode:GKSendDataReliable
error:nil];
}
Good luck with it!

Answer 2

I would recommend sending them in separate packets since an image could be quite large (send the image itself in multiple packets). But if you really want to do it all at once, try wrapping them in an NSDictionary. Encode the dictionary into NSData, and send it off.
Something like the following would work.
NSDictionary *myDict = //whatever your dict should hold here...
NSMutableData *packet = [[NSMutableData alloc] init];
NSKeyedArchiver *archiver = [[NSKeyedArchiver alloc]initForWritingWithMutableData:packet];
[archiver encodeObject:myDict forKey:#"SomeKey"];
[archiver finishEncoding];