我试图了解 EADemo 的工作原理以及外部附件框架的工作原理。EADemo 可在此处获得:
http://developer.apple.com/library/ios/#samplecode/EADemo/Introduction/Intro.html
我要做的就是修改 Apple 的 EADemo 项目以显示它接收到的字节(假设它们是 ASCII 类型的字符),而不是仅仅计算它接收到的字节数。所以我改变了 EASessionTransferViewController.m...从:
- (void)_sessionDataReceived:(NSNotification *)notification
{
EADSessionController *sessionController = (EADSessionController *)[notification object];
uint32_t bytesAvailable = 0;
while ((bytesAvailable = [sessionController readBytesAvailable]) > 0) {
NSData *data = [sessionController readData:bytesAvailable];
if (data) {
_totalBytesRead += bytesAvailable;
}
}
[_receivedBytesLabel setText:[NSString stringWithFormat:@"Bytes Received from Session: %d", _totalBytesRead]];
}
@end
至...
- (void)_sessionDataReceived:(NSNotification *)notification
{
EADSessionController *sessionController = (EADSessionController *)[notification object];
uint32_t bytesAvailable = 0;
while ((bytesAvailable = [sessionController readBytesAvailable]) > 0) {
NSData *data = [sessionController readData:bytesAvailable];
if (data) {
_totalBytesRead += bytesAvailable;
NSString *asciiStringFromData = [[NSString alloc] initWithData:data encoding:NSASCIIStringEncoding];
}
}
[_receivedBytesLabel setText:[NSString stringWithFormat:@"ASCII bytes read: %@", asciiStringFromData]];
}
@end
但这根本行不通。上次我试了,什么都没有。它连接到一个蓝牙板,该板只是回显接收到的 ASCII 字符或字符串。
有人可以帮忙吗?