我正在开发需要向 Android Socket 服务器发送消息的 iOS 应用程序。
我正面临一个奇怪的情况。如果我连续在 NSOutputStream 中写入数据,那么 Android 设备会收到消息,但是,如果我将代码写入 While 循环或任何 If 条件,则它不起作用。
- (void)stream:(NSStream *)aStream handleEvent:(NSStreamEvent)eventCode;{
switch (eventCode) {
case NSStreamEventOpenCompleted:{
NSLog(@"Stream opened");
}
break;
case NSStreamEventHasBytesAvailable:
NSLog(@"Stream has bytes available");
break;
case NSStreamEventErrorOccurred:
NSLog(@"Can not connect to the host!");
break;
case NSStreamEventEndEncountered:
NSLog(@"Stream closed");
break;
case NSStreamEventHasSpaceAvailable:{
// if (sendCount < 100){ //NOT WORKING
uint8_t *readBytes = (uint8_t *)[_data mutableBytes];
readBytes += byteIndex; // instance variable to move pointer
int data_len = [_data length];
unsigned int len = ((data_len - byteIndex >= 1024) ?
1024 : (data_len-byteIndex));
uint8_t buf[len];
(void)memcpy(buf, readBytes, len);
len = [outputStream write:(const uint8_t *)buf maxLength:len];
// byteIndex += len;
byteIndex = 0;
sendCount++;
// }
}
break;
default:
NSLog(@"Unknown event: %@ : %lu", aStream, (unsigned long)eventCode);
}
}
在上面的代码中,它不断地写入 NSOutputstream 和 Android 设备获取数据。但是如果我取消注释 If 条件,那么它将不起作用。任何帮助将不胜感激。