IOS 區域網路發送資訊

標籤：

基於ios 例子WiTap

1.建立本地的服務並設定監聽時間檢測是否有裝置串連。

NSNetService  * server = [[NSNetService alloc] initWithDomain:@"local." type:kWiTapBonjourType name:@"Minwei" port:0];//[UIDevice currentDevice].nameif(self.server != nil) {　　[self.server setDelegate:self]; 　 //self.server.includesPeerToPeer = YES; 　 [self.server publishWithOptions:NSNetServiceListenForConnections]; 　 [self.server scheduleInRunLoop:[NSRunLoop currentRunLoop]forMode:NSRunLoopCommonModes]; 　 //[self.server publish];
}

2.建立本地的用戶端搜尋服務。

testServiceBrowser = [[NSNetServiceBrowser alloc] init];[testServiceBrowser setDelegate:self];//testServiceBrowser.includesPeerToPeer = YES;[testServiceBrowser searchForServicesOfType:kWiTapBonjourType inDomain:@"local"];

3當尋找到服務的時候會調用以下方法，尋找和移除來確定區域網路裡面有多少個IP串連上。

- (void)netServiceBrowser:(NSNetServiceBrowser *)browser didRemoveService:(NSNetService *)service moreComing:(BOOL)moreComing{    //[netService removeObject:service];    if(!moreComing){        NSLog(@"remove");        [netServices removeObject:service];    }}- (void)netServiceBrowser:(NSNetServiceBrowser *)browser didFindService:(NSNetService *)service moreComing:(BOOL)moreComing{    // Only update the UI once we get the no-more-coming indication.    //[netService addObject:service];    if(!moreComing){        NSLog(@"find");        [service setDelegate:self];        [netServices addObject:service];        //[service resolveWithTimeout:5.0];    }}

4.通過開啟NSInputStream和NSOutputStream來進行對第一個配對上的使用者進行串連

BOOL success;NSInputStream *     inStream;NSOutputStream *    outStream;success = [service getInputStream:&inStream outputStream:&outStream];if ( ! success ) {　　//進行重新串連} else {　　self.inputStream  = inStream;　　self.outputStream = outStream;            　　[self openStreams];}

- (void)stream:(NSStream *)stream handleEvent:(NSStreamEvent)eventCode{#pragma unused(stream)        switch(eventCode) {                    case NSStreamEventOpenCompleted: {            self.streamOpenCount += 1;            assert(self.streamOpenCount <= 2);            // Once both streams are open we hide the picker and the game is on.            if (self.streamOpenCount == 2) {                //串連成功            }        } break;                    case NSStreamEventHasSpaceAvailable: {            assert(stream == self.outputStream);            // do nothing        } break;                    case NSStreamEventHasBytesAvailable: {
　　　　　　　//回調資訊成功            uint8_t     b;            NSInteger   bytesRead;            assert(stream == self.inputStream);            bytesRead = [self.inputStream read:&b maxLength:sizeof(uint8_t)];            if (bytesRead <= 0) {                // Do nothing; we‘ll handle EOF and error in the                // NSStreamEventEndEncountered and NSStreamEventErrorOccurred case,                // respectively.            } else {                if(b!=‘#‘){                    passMessage[inum] = b;                    inum++;                }                else{                    printf("%s", (char *)passMessage);                    NSString *result = [NSString stringWithCString:(char *)passMessage encoding:NSUTF8StringEncoding];                    NSLog(@"%@", result);                    inum =0;                }                return;            }        } break;                    default:            assert(NO);            // fall through        case NSStreamEventErrorOccurred:            // fall through        case NSStreamEventEndEncountered: {//重新查詢連結        } break;    }}

附 openStreams ，closeStreams和發送資訊

- (void)openStreams{    assert(self.inputStream != nil);            // streams must exist but aren‘t open    assert(self.outputStream != nil);    assert(self.streamOpenCount == 0);        [self.inputStream  setDelegate:self];    [self.inputStream  scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];    [self.inputStream  open];        [self.outputStream setDelegate:self];    [self.outputStream scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];    [self.outputStream open];}- (void)closeStreams{    assert( (self.inputStream != nil) == (self.outputStream != nil) );      // should either have both or neither    if (self.inputStream != nil) {        [self.inputStream removeFromRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];        [self.inputStream close];        self.inputStream = nil;                [self.outputStream removeFromRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];        [self.outputStream close];        self.outputStream = nil;    }    self.streamOpenCount = 0;}

send 方法

- (void)send:(uint8_t){    NSLog(@"send");    assert(self.streamOpenCount == 2);    // Only write to the stream if it has space available, otherwise we might block.    // In a real app you have to handle this case properly but in this sample code it‘s    // OK to ignore it; if the stream stops transferring data the user is going to have    // to tap a lot before we fill up our stream buffer (-:        if ( [self.outputStream hasSpaceAvailable] ) {                NSInteger bytesWritten;        NSUInteger dataLength;                NSUInteger soFar = 0;        NSInteger written = 0;                        NSData * data = [@"qwertitiww#" dataUsingEncoding:NSUTF8StringEncoding];        const uint8_t * m = (Byte*)[data bytes];        dataLength = [data length];                do{                        bytesWritten = [self.outputStream write:&m[soFar] maxLength:dataLength - soFar];            assert(bytesWritten!=0);            if(written ==-1){                break;            }            else{                soFar += bytesWritten;            }            if (bytesWritten != dataLength) {                [self setupForNewGame];                break;            }                    }while (soFar != dataLength);    }}

由於傳輸只能接受uint8_t所以需要傳送一個bytes來傳送字串  在最後#號是結束符來區分時候傳送完一個資訊

 

IOS 區域網路發送資訊