Question

我正在写一个iPhone 应用程序, 处理服务器侧面和客户端。我的问题在于我无法从我的应用程序( 用户侧面) 向我的 java 程序( 服务员侧面) 发送任何数据。我现在有点卡住了, 任何帮助都会非常感激。

我的boj-c代码( 用户名) :

- (BOOL) initConnection: (NSString *) ipAddr {
CFWriteStreamRef writeStream;
CFStreamCreatePairWithSocketToHost(NULL, (__bridge CFStringRef)ipAddr, 4444, NULL, &writeStream);

if(!writeStream)
    return NO;

outStream = (__bridge NSOutputStream *) writeStream;

[outStream setDelegate:self];

[outStream scheduleInRunLoop:[NSRunLoop mainRunLoop] forMode:NSDefaultRunLoopMode];

[outStream open];

self.data = [[NSData alloc] init];

return YES;


- (void) sendCommand: (NSString *) command {
NSLog(@"Command that was sent to method: %@", command);

self.data = [NSData dataWithBytes:@"This is a test
" length:16];

int bytes = [outStream write:[self.data bytes] maxLength:[self.data length]];

我的爪哇代码( 服务员) :

private void handleCommands() {
    try {
        do {
            System.out.println("Right before reading socket");
            msg = in.readLine();

            System.out.println("Received: " + msg);

        } while(!EOC);
    } catch(IOException e) {
        e.printStackTrace();
    }
}

What happens is that when I send data from my app the code on my server side never gets past
msg = in.readLine(). When I terminate the connection on the app side it prints out that the string received was null.

Answer 1

实际上,在这个代码线上:

self.data = [NSData dataWithBytes:@"This is a test
" length:16];

字符串长度为 15, 但您通过 16 作为参数。也许它正在等待最后的字符?

尝试不要硬编码字符串长度, 例如 :

NSString *msgStr = @"This is a test
";
self.data = [NSData dataWithBytes:msgStr length:[msgStr length]];

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