[英]How does didAcceptConnectionWithInputStream:outputStream: get called?
[英]NSNetService publishes, but didAcceptConnectionWithInputStream… is never called
我一直在嘗試在iOS上制作一個簡單的應用程序,該應用程序將收到一條消息,然后根據該消息執行操作(此刻,我只想通過NSLog
進行顯示)。 我可以連接到該服務,但是該服務似乎從未收到任何東西。 這是我的.h文件:
#import <Foundation/Foundation.h>
#import <arpa/inet.h>
@interface PalServiceController : NSObject <NSNetServiceDelegate>
@property (nonatomic, strong) NSNetService *ns;
@property (nonatomic, strong) NSOutputStream *ostream;
- (void)start;
+ (int)getPort;
- (void)stream:(NSStream *)stream handleEvent:(NSStreamEvent)eventCode;
@end
和我的.m:
#import "PalServiceController.h"
@implementation PalServiceController
- (void)start
{
// Start a net service
int port = [PalServiceController getPort];
NSLog(@"Opening on port %i", port);
self.ns = [[NSNetService alloc] initWithDomain:@""
type:@"_TestingProtocol._tcp."
name:@"Test Name For iPhone"
port:port];
if (self.ns) {
[self.ns setDelegate:self];
[self.ns publish];
self.ns.delegate = self;
} else {
NSLog(@"Error starting service");
}
}
/*
* Code from: http://stackoverflow.com/a/11723158/657676
*/
+ (int) getPort
{
...
}
- (void)netServiceWillResolve:(NSNetService *)sender
{
NSLog(@"Resolving");
}
- (void)netServiceDidResolveAddress:(NSNetService *)sender
{
NSLog(@"Resolved Address");
}
- (void)netService:(NSNetService *)sender didNotPublish:(NSDictionary *)errorDict
{
NSLog(@"Error publishing");
}
- (void)netService:(NSNetService *)sender didAcceptConnectionWithInputStream:(NSInputStream *)inputStream outputStream:(NSOutputStream *)outputStream
{
NSLog(@"Got a connection! (server)");
// Close self down
[self.ns stopMonitoring];
[self.ns stop];
}
- (void)netService:(NSNetService *)sender didNotResolve:(NSDictionary *)errorDict
{
NSLog(@"Error resolving");
}
- (void)netServiceDidPublish:(NSNetService *)sender
{
NSLog(@"Published server");
}
- (void)netServiceDidStop:(NSNetService *)sender
{
NSLog(@"Server stopped");
}
- (void)netService:(NSNetService *)sender didUpdateTXTRecordData:(NSData *)data
{
NSLog(@"Updated TXT Record");
}
- (void)stream:(NSStream *)stream handleEvent:(NSStreamEvent)eventCode
{
NSLog(@"Event on server");
switch(eventCode) {
...
}
}
@end
這通過以下方式調用:
self.controller = [[PalServiceController alloc] init];
[self.controller start];
當我使用Bonjour Browser時 ,可以看到該服務,並且當我使用自己的NSNetServiceBrowser
實現或Bill NSNetServiceBrowser
的示例( 博客文章 , 代碼 )時,它似乎已建立連接(即,我自己的實現收到NSStreamEventHasSpaceAvailable
和NSStreamEventOpenCompleted
通過stream:(NSStream *)stream handleEvent:(NSStreamEvent)eventCode
。 但是,以上方法均未在服務器上調用。
我還是iOS的新手,所以我希望這只是一些愚蠢的錯誤,可以很容易地解決。
-[NSNetService publish]
僅發布服務; 您負責創建套接字並偵聽提供給NSNetService初始化程序的端口。 您不會收到netService:didAcceptConnectionWithInputStream:outputStream:
因為NSNetService對套接字一無所知。
如果您希望NSNetService為您管理套接字並發送didAcceptConnection...
使用-[NSNetService publishWithOptions:]
:
[self.ns publishWithOptions:NSNetServiceListenForConnections];
在這種情況下,您需要確保用於初始化NSNetService的端口未使用。 您的getPort
方法永遠不會關閉套接字(並且會泄漏CFSocketRef),因此在發布服務時將使用該套接字,從而導致錯誤。
我建議您刪除getPort
並按照Apple在NSNetServices.h中的建議,“將端口號指定為零以使用隨機端口。”
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