ios - AppDelegate 方法未被调用

Question

我正在尝试使用 xmppframework 制作 jabber 聊天应用程序。我已经在applicationAppDelegate中实现了xmppStream方法，但是这些方法都没有被调用。

这是 applicationAppDelegate 的代码:

    - (void)setupStream {
    xmppStream = [[XMPPStream alloc] init];
    [xmppStream addDelegate:self delegateQueue:dispatch_get_main_queue()];
    //[self connect];
}
- (void)goOnline {
    XMPPPresence *presence = [XMPPPresence presence];
    [[self xmppStream] sendElement:presence];
}
- (void)goOffline {
    XMPPPresence *presence = [XMPPPresence presenceWithType:@"unavailable"];
    [[self xmppStream] sendElement:presence];
}

- (BOOL)connect {
    [self setupStream];


    NSString *emailUserDefault = [[NSUserDefaults standardUserDefaults] stringForKey:@"email"];

    NSString *jabberID = [emailUserDefault stringByAppendingString:@"@server.local"];
    NSLog(@"%@",jabberID);
    NSString *myPassword = [[NSUserDefaults standardUserDefaults] stringForKey:@"password"];
    NSLog(@"%@",myPassword);

    if (![xmppStream isDisconnected]) {
        NSLog(@"You are connected");

        return YES;
    }
    if (jabberID == nil || myPassword == nil) {
        return NO;
    }
    [xmppStream setMyJID:[XMPPJID jidWithString:jabberID]];
    //xmppStream.myJID = [XMPPJID jidWithString:jabberID];
    password = myPassword;

    NSError *error = nil;
    if (![xmppStream connectWithTimeout:20 error:&error])
    {
        UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Error"
                                                            message:[NSString stringWithFormat:@"Can't connect to server %@", [error localizedDescription]]
                                                           delegate:nil
                                                  cancelButtonTitle:@"Ok"
                                                  otherButtonTitles:nil];
        [alertView show];
        return NO;
    }

    return YES;
}
- (void)disconnect {
    [self goOffline];
    [xmppStream disconnect];
}
- (void)xmppStreamDidConnect:(XMPPStream *)sender {
    isOpen = YES;
    NSError *error = nil;
    [[self xmppStream] authenticateWithPassword:password error:&error];
}
- (void)xmppStreamDidAuthenticate:(XMPPStream *)sender {
    [self goOnline];
}
- (void)xmppStream:(XMPPStream *)sender didReceivePresence:(XMPPPresence *)presence {
    NSString *presenceType = [presence type]; // online/offline
    NSString *myUsername = [[sender myJID] user];
    NSString *presenceFromUser = [[presence from] user];
    if (![presenceFromUser isEqualToString:myUsername]) {
        if ([presenceType isEqualToString:@"available"]) {
            [__chatDelegate newBuddyOnline:[NSString stringWithFormat:@"%@@%@", presenceFromUser, @"server.local"]];
        } else if ([presenceType isEqualToString:@"unavailable"]) {
            [__chatDelegate buddyWentOffline:[NSString stringWithFormat:@"%@@%@", presenceFromUser, @"server.local"]];
        }
    }
}
- (void)xmppStream:(XMPPStream *)sender didReceiveMessage:(XMPPMessage *)message {
    NSString *msg = [[message elementForName:@"body"] stringValue];
    NSString *from = [[message attributeForName:@"from"] stringValue];
    NSMutableDictionary *m = [[NSMutableDictionary alloc] init];
    [m setObject:msg forKey:@"msg"];
    [m setObject:from forKey:@"sender"];
    [__messageDelegate newMessageReceived:m];

}

这是我的 chatViewController 类的代码:

- (myApplicationAppDelegate *)appDelegate {
    return (myApplicationAppDelegate *)[[UIApplication sharedApplication] delegate];
}
- (XMPPStream *)xmppStream {
    return [[self appDelegate] xmppStream];
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    onlineBuddies = [[NSMutableArray alloc ] init];
    myApplicationAppDelegate *del = [self appDelegate];
    [self xmppStream];
    NSString *login = [[NSUserDefaults standardUserDefaults] objectForKey:@"email"];
    del._chatDelegate = self;
    if (login) {
        if ([[self appDelegate] connect]) {
            NSLog(@"show buddy list");
        }
    } else {
        NSLog(@"Login Error");
    }

}

我无法弄清楚为什么 xmpp 委托(delegate)方法没有被调用。如果有人可以帮助我，请不要犹豫。

提前致谢。

Answer 1

我认为您误解了AppDelegate的用途。首先，对于您在 Xcode 中创建的每个 iOS 应用程序，都会创建一个包含名称 AppDelegate 的类，但该类只能用于获取应用程序的信息状态，例如应用程序是否进入后台、是否成功启动或是否从后台启动。此外，应用程序委托(delegate)还用于指定应用程序的根(或入口点) View Controller 。

所以我认为您应该首先检查有关如何创建一个非常简单的应用程序(“Hello World 应用程序”)的基本规则(或基本教程)，然后您可以继续创建应用程序的基本结构并决定哪些 View Controller 或哪些模型类将处理您的连接处理和响应/请求解析。

我强烈建议您查看一下 View Controller ，并且我很确定在执行上述建议的“任务”后，您将回答自己发布的问题。

P.S 最后一点，看看“iOS 命名和其他约定”enter link description here life cycle methods