Bluetooth File Transfer

Drag both files – BTFileTransfer.h and BTFileTransfer.m into your project and link against GameKit.framework.

Create a new instance of BTFileTransfer like this

_fileTransfer = [[BTFileTransfer alloc] init];

and assign "self" as the delegate of BTFileTransfer like this

_fileTransfer.delegate = self;

Implement at least the required delegate method of the BTFileTransferDelegate protocol. According to the header it is

- (void)fileReceived:(NSData *)data {

}

"Pair" by calling

[_fileTransfer pair];

After the delegate method

- (void)peerConnected:(NSString *)displayName {

}

got called you can send data or a file using one of the two available methods:

UIImage *image;
NSError *error;

[_fileTransfer sendData:UIImageJPEGRepresentation(image, 0.8) error:&error];

Like that you can also send strings, arrays or a dictionary.

To send a file from the local filesystem:

NSString *path;
NSError *error;

[_fileTransfer sendFile:path error:&error];

@property (strong) NSString *displayName;

Human-readable name identifying the current device

Device name is used if not set

- (void)fileTransferInProgress:(unsigned int)expectedLength;

Called when receiving a file on the device receiving it.

You can present the user with an alert telling him the size of the file.