我有一个关于将 currentSession 传递到下一页的问题。我已经在第一个页面视图控制器上测试并成功建立了蓝牙会话。现在我的问题是,我如何将当前会话传递到下一页,因为导航到下一页后,蓝牙连接丢失。因此,在导航到下一页后,当前会话将丢失。这是通过用两部手机发送随机图像来测试的。但是,如果第二次在 nextpageController 上提示蓝牙连接,则可以发送图片。
视图控制器.M:
-(IBAction)btnBluetoothConnect:(id)sender {
picker = [[GKPeerPickerController alloc] init];
picker.delegate = self;
picker.connectionTypesMask = GKPeerPickerConnectionTypeNearby;
[picker show];
}
- (void)peerPickerController:(GKPeerPickerController *)pk didConnectPeer:(NSString *)peerID toSession:(GKSession *)session {
self.currentSession = session;
session.delegate = self;
[session setDataReceiveHandler:self withContext:nil];
picker.delegate = nil;
[picker dismiss];
}
- (void)peerPickerControllerDidCancel:(GKPeerPickerController *)pk {
picker.delegate = nil;
}
- (void)session:(GKSession *)session peer:(NSString *)peerID didChangeState:(GKPeerConnectionState)state {
switch (state) {
case GKPeerStateConnected:
NSLog(@"connected");
if (GKPeerStateConnected) {
self.progress = [[ProgressAlertView alloc] init];
progress.delegate = self;
progress.task = @selector(compute);
[progress start];
}
break;
case GKPeerStateDisconnected:
NSLog(@"disconnected");
currentSession = nil;
default:
break;
}
}
-(void)compute{
[self updateUIWithProgress:0.0 andMessage:@"3"];
[NSThread sleepForTimeInterval:3];
if([progress isCancelled]){
self.progress = nil;
return;
}
[self updateUIWithProgress:0.4 andMessage:@"2"];
[NSThread sleepForTimeInterval:1];
if([progress isCancelled]){
self.progress = nil;
return;
}
[self updateUIWithProgress:0.6 andMessage:@"1"];
[NSThread sleepForTimeInterval:1];
if([progress isCancelled]){
self.progress = nil;
return;
}
[self updateUIWithProgress:0.8 andMessage:@"0"];
[NSThread sleepForTimeInterval:1];
if([progress isCancelled]){
self.progress = nil;
return;
}
else
[self updateUIWithProgress:1.0 andMessage:@"Start!"];
NSLog(@"Woohahaha");
**[self performSegueWithIdentifier:@"next page" sender:self];**
//process the data here or send a notification for data processing
//when this method returns, the progress alert view disappears.
}
NextPageController.m:
-(IBAction)btnSend:(id)sender{
if(currentSession){
NSData *imageData = UIImageJPEGRepresentation([UIImage imageNamed:[NSString stringWithFormat:@"4.png"]], .7);
[self.currentSession sendDataToAllPeers:imageData withDataMode:GKSendDataReliable error:nil];
}
}
- (void) receiveData:(NSData *)data fromPeer:(NSString *)peer inSession: (GKSession *)session context:(void *)context{
imageView.image = [UIImage imageWithData:data];
}
- (void)peerPickerController:(GKPeerPickerController *)pk didConnectPeer:(NSString *)peerID toSession:(GKSession *)session {
self.currentSession = session;
session.delegate = self;
[session setDataReceiveHandler:self withContext:nil];
picker.delegate = nil;
[picker dismiss];
}
- (void)peerPickerControllerDidCancel:(GKPeerPickerController *)pk {
picker.delegate = nil;
}