我有一个为网络消息创建后台线程的应用程序。该应用程序几乎可以完美运行,除非它连接到的服务器关闭连接。我不确定为什么会发生这种情况,但非常感谢任何建议。我已经包含了可以遵循该问题的代码片段。如果有些模糊或需要更多细节,请告诉我。
- (void)stream:(NSStream *)stream handleEvent:(NSStreamEvent)eventCode {
switch(eventCode) {
case NSStreamEventErrorOccurred:
{
NSLog(@"NSStreamEventErrorOccurred");
[self Disconnect:self];
}
}
}
- (void)Disconnect:(id)sender {
[self performSelector:@selector(closeThread) onThread:[[self class]networkThread] withObject:nil waitUntilDone:YES];
[outputStream close];
[outputStream removeFromRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];
[outputStream release];
outputStream = nil;
}
+ (NSThread*)networkThread
{
// networkThread needs to be static otherwise I get an error about a missing block type specifier
static NSThread* networkThread = nil;
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
networkThread = [[NSThread alloc] initWithTarget:self selector:@selector(networkThreadMain:) object:nil];
[networkThread start];
});
return networkThread;
}
挂断发生在返回网络线程行上。执行该行后,应用程序似乎挂起并冻结,我无法说出原因。
提前谢谢。
编辑
这是CloseThread的代码片段,供感兴趣的人使用
- (void)closeThread
{
/*if(!inputStream)
return;
[inputStream close];
[inputStream removeFromRunLoop:[NSRunLoop currentRunLoop] forMode:NSRunLoopCommonModes];
[inputStream release];
inputStream = nil;*/
}
我建议更改:
[self performSelector:@selector(closeThread) onThread:[[self class]networkThread] withObject:nil waitUntilDone:YES];
自:
[self performSelector:@selector(closeThread) onThread:[[self class]networkThread] withObject:nil waitUntilDone:NO];
也就是说,不要等待。