使用cocoa连接到本地网络上的设备

Question

我一直在尝试为我的ipad开发一个应用程序，我可以用它连接到我的本地网络设备，以便毫无进展地获取文件等。我要做的是首先检测网络上的设备，然后通过连接选择要从中浏览文件的设备。

到目前为止，我得到的是

    #import "BrowseForNetworkDevices.h"

@implementation BrowseForNetworkDevices

- (id)init
{    
    self = [super init];

    if (self) 
    {        
        services = [[NSMutableArray alloc] init]; 
        serviceBrowser = [[NSNetServiceBrowser alloc] init];
        [serviceBrowser setDelegate: delegateObject];        

        searching = NO;        
    }

    return self;    
}

- (void)dealloc
{    
    [services release];    
    [serviceBrowser release];
    [super dealloc];    
}



// Sent when browsing begins
- (void)netServiceBrowserWillSearch:(NSNetServiceBrowser *)browser
{    
    searching = YES;    
    [serviceBrowser searchForServicesOfType:@" " inDomain:@"local."];
    [self updateUI];    
}

// Sent when browsing stops
- (void)netServiceBrowserDidStopSearch:(NSNetServiceBrowser *)browser
{    
    searching = NO;    
    [self updateUI];    
}

// Sent if browsing fails
- (void)netServiceBrowser:(NSNetServiceBrowser *)browser
             didNotSearch:(NSDictionary *)errorDict
{    
    searching = NO;    
    [self handleError:[errorDict objectForKey:NSNetServicesErrorCode]];    
}

// Sent when a service appears
- (void)netServiceBrowser:(NSNetServiceBrowser *)browser
           didFindService:(NSNetService *)aNetService
               moreComing:(BOOL)moreComing
{    
    //[services addObject:aNetService];
    if (![services containsObject:aNetService]) {
        [self willChangeValueForKey:@"services"];
        [services addObject:aNetService];
        [self didChangeValueForKey:@"service"];
    }
    if(!moreComing)        
    {       
        [self updateUI];        
    }    
}

// Sent when a service disappears
- (void)netServiceBrowser:(NSNetServiceBrowser *)browser
         didRemoveService:(NSNetService *)aNetService
               moreComing:(BOOL)moreComing
{
    //[services removeObject:aNetService];
    if ([services containsObject:aNetService]) {
        [self willChangeValueForKey:@"service"];
        [services removeObject:aNetService];
        [self didChangeValueForKey:@"service"];
    }
    if(!moreComing)        
    {       
        [self updateUI];       
    }  
}

// Error handling code
- (void)handleError:(NSNumber *)error
{    
    NSLog(@"An error occurred. Error code = %d", [error intValue]);

   // Handle error here    
}



// UI update code
- (void)updateUI
{

    if(searching)        
    {        
        // Update the user interface to indicate searching
        for(Class obj in services){
            NSLog(@"service found %@", obj);
        }
        // Also update any UI that lists available services

    }    
    else        
    {        
        // Update the user interface to indicate not searching        
    }

}


@end

有没有关于如何执行这类任务的好教程？

提前感谢你的帮助

Answer 1

您需要网络设备和您的iPad使用相同的协议。您需要选择适当的协议。听起来你想要做的是文件传输--有很多协议可以处理这个问题，这些协议都是在iOS库中实现的：

• WebDAV
• HTTP
• FTP
• SFTP
• AFP
• SAMBA

为了让这些设备互相检测，你需要使用苹果的Bonjour之类的设备