如果您需要进一步的解释或详细信息,我会尽力解释,请发表评论..
我正在我的计算机上运行一个本地python服务器,它根据请求向客户端发送消息。
我有一个MAC客户端应用程序,其中我有3个类 -
Chatlogic类 - 此类初始化连接并从服务器发送和接收消息。
登录类 - 这维护了用户对应用程序的登录,在这个类中我有一个Chatlogic类的实例,我可以通过chatlogic类的对象发送消息,如下所示[chatLogicObject sendmessage:东西
我的问题是这个=当我收到它时,它来自chatLogic类实例,而不是在LoginClass中,所以我在登录类中有一个名为 - (void)messageReceived的方法应该覆盖chatLogic类中的相同方法(但是这不起作用)。 我怎样才能在Loginclass中收到该方法?
为了避免混淆,我添加了我的chatlogic类
#import <Foundation/Foundation.h>
@interface chatLogic : NSObject <NSStreamDelegate>
@property (copy)NSOutputStream *outputStream;
@property (copy)NSInputStream *inputStream;
@property (copy)NSString *streamStatus;
-(void)initNetworkCommunications;
-(void)sendMessage:(id)sender;
-(void)stream:(NSStream *)aStream handleEvent:(NSStreamEvent)streamEvent;
-(void)messageReceived:(NSString*)message; //i want this method to be used in some other classes
@end
实施文件如下
@implementation chatLogic
@synthesize inputStream; @synthesize outputStream; @synthesize streamStatus;
- (ID)INIT {
if (self == [super init]) {
}
return self;
}
- (无效)initNetworkCommunications {
CFReadStreamRef readStream;
CFWriteStreamRef writeStream;
CFStreamCreatePairWithSocketToHost(NULL, (CFStringRef)@"192.168.1.22", 80, &readStream, &writeStream);
inputStream = (__bridge NSInputStream *)readStream;
outputStream = (__bridge NSOutputStream *)writeStream;
[inputStream setDelegate:self];
[outputStream setDelegate:self];
[inputStream scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];
[outputStream scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];
[inputStream open];
[outputStream open];
}
- (void)stream:(NSStream *)aStream handleEvent:(NSStreamEvent)streamEvent {
switch (streamEvent) {
case NSStreamEventOpenCompleted:
NSLog(@"Stream opened");
streamStatus = [[NSString alloc]initWithFormat:@"Stream opened"];
break;
case NSStreamEventHasBytesAvailable:
if (aStream == inputStream) {
uint8_t buffer[1024];
int len;
while ([inputStream hasBytesAvailable]) {
len = (int)[inputStream read:buffer maxLength:sizeof(buffer)];
if (len > 0) {
NSString *output = [[NSString alloc]initWithBytes:buffer length:len encoding:NSASCIIStringEncoding];
if (nil != output) {
NSLog(@"server said: %@",output);
[self messageReceived:output];
}
}
}
}
case NSStreamEventErrorOccurred:
{
NSLog(@"cannot connect to the host!");
break;
}
case NSStreamEventEndEncountered:
{
break;
}
default:
{
NSLog(@"unknown event!!");
}
}
}
- (无效)的sendMessage:(ID)发送方{
}
- (无效)的messageReceived:(* NSString的)消息{
NSLog(@"the received message in chat logic class");
}
- (无效)的dealloc {
[inputStream close];
[outputStream close];
[inputStream release];
[outputStream release];
[super dealloc];
}
@end
答案 0 :(得分:2)
我认为您希望在多个类实例中接收相同的消息。最好的方法是使用NSNotificationCentre。一旦在一个课程中收到该消息,您就可以发布通知,然后所有已注册该通知的听众都会听到该通知。
代表团也很好,但通常在你确定谁将成为听众时使用(我不确定你的情况会发生什么)。希望这会有所帮助。
<强>更新强>
是的,您也可以发送一个包含某些信息的对象..您可以看到如何使用此链接发布包含对象的通知https://stackoverflow.com/a/4127535/919545
答案 1 :(得分:1)
如果我理解了一切,你在这里谈论代表团。
您应该使用类似(-(void)didReceiveMessage:(NSString*)message
)的方法定义ChatLogicDelegate协议,向ChatLogic类添加委托属性,并在实例化时将 loginClassObject 设置为 chatLogicObject的委托。在ChatLogic类中,每当必要时调用[delegate didReceiveMessage:json]
并且 loginClassObject 将获取消息。