iPhone SDK：[錯誤]找不到協議聲明 「NSNetServiceDelegate」

Question

這個代碼是從樣品中 部分.H：

@interface ViewController : UITableViewController <NSNetServiceBrowserDelegate> { 
     NSMutableArray * tableData; 
     NSNetServiceBrowser * _browser; 
     NSMutableArray * _foundServices; 

     NSURLConnection * _connection; 
     NSInputStream * _consumerStream; 
     NSString * controllerHostName; 
} 
@property (nonatomic, retain) NSMutableArray * tableData; 
@property (nonatomic, retain) NSNetServiceBrowser * _browser; 
@property (nonatomic, retain) NSMutableArray * _foundServices; 
@property (nonatomic, retain) NSURLConnection * connection; 
@property (nonatomic, retain) NSInputStream * consumerStream; 
@property (nonatomic, retain) NSString * controllerHostName; 

在.M部分

#import "ViewController.h" 
    #include <sys/socket.h> 
    #include <netinet/in.h> 
    #include <unistd.h> 
    #include <CFNetwork/CFNetwork.h> 

    @synthesize tableData; 
    @synthesize _browser; 
    @synthesize _foundServices; 
    @synthesize consumerStream = _consumerStream; 
    @synthesize connection = _connection; 
    @synthesize controllerHostName; 

    - (void)viewWillAppear:(BOOL)animated { 
      [super viewWillAppear:animated]; 

      _browser = [[NSNetServiceBrowser alloc] init]; 
      [_browser setDelegate:self]; 
      [_browser searchForServicesOfType:@"_service._tcp" inDomain:@""]; 
      [super viewWillAppear:animated]; 
    } 


    - (void)viewWillDisappear:(BOOL)animated { 
      [super viewWillDisappear:animated]; 

      [_browser stop]; 
      _browser.delegate = nil; 
      [_browser release]; 
      _browser = nil; 

      [_foundServices removeAllObjects]; 
    } 
    - (void)netServiceBrowser:(NSNetServiceBrowser *)netServiceBrowser didFindService:(NSNetService *)netService moreComing:(BOOL)moreServicesComing 
    { 
      self.controllerHostName = [NSString stringWithFormat:@"%@.%@", netService.name, netService.domain]; 
      NSLog(@"ControllerHost String is: %@", self.controllerHostName); 
      NSLog(@"URL to use is === %@.%@", netService.name, netService.domain); 
      if (!_foundServices) { 
        _foundServices = [[NSMutableArray alloc] init]; 
      } 

      [_foundServices addObject:netService]; 

      [self.tableView reloadData]; 
    } 

    - (void)netServiceBrowser:(NSNetServiceBrowser *)netServiceBrowser didRemoveService:(NSNetService *)netService moreComing:(BOOL)moreServicesComing 
    { 
      [_foundServices removeObject:netService]; 
    } 

    - (void)netServiceBrowserDidStopSearch:(NSNetServiceBrowser *)aNetServiceBrowser 
    { 

     [_foundServices removeAllObjects]; 
} 

我聲明所有標題爲樣本 但我收到錯誤消息「無法找到協議聲明」NSNetServiceDelegate「 in .h

interface ViewController : UITableViewController <NSNetServiceBrowserDelegate> 

那麼我錯過了什麼聲明？ 該示例沒有任何警告或錯誤

Answer 1

問題是一個未使用的函數。剛剛刪除：

[self.tableView reloadData]; 

它會好的！

Answer 2

我認爲它是在「NSNetServices.h」中定義的嗎？

Answer 3

添加到您的標題：

#import <Foundation/NSNetServices.h> 

我得到這個從BonjourWeb蘋果的示例代碼項目。

Answer 4

我發現類似的答案，只是刪除

- (void)viewDidAppear:(BOOL)animated { 
    [super viewDidAppear:animated]; 
    [_browser stop]; 
    _browser.delegate = nil; 
    [_browser release]; 
    _browser = nil; 

    [_foundServices removeAllObjects]; 
} 

該計劃將得到Netservice我想...... 爲什麼？