iphone - 从苹果复制了可达性测试，但链接器失败

我尝试使用苹果发布的可达性项目来检测自己示例中的可达性。我复制了最多的初始化，但我在链接器中遇到了这个失败:



我的代表.h:

#import <UIKit/UIKit.h>

@class Reachability;

@interface testAppDelegate : NSObject
<UIApplicationDelegate> {  UIWindow
*window;  UINavigationController *navigationController;

 Reachability* hostReach;
 Reachability* internetReach;
 Reachability* wifiReach;

}

@property (nonatomic, retain) IBOutlet
UIWindow *window; @property
(nonatomic, retain) IBOutlet
UINavigationController
*navigationController;

@end

我的代表.m:

#import "testAppDelegate.h"

#import "SecondViewController.h"
#import "Reachability.h"

@implementation testAppDelegate



@synthesize window; @synthesize
navigationController;

- (void) updateInterfaceWithReachability:
(Reachability*) curReach {
    if(curReach == hostReach)  {
        BOOL connectionRequired= [curReach connectionRequired];


        if(connectionRequired)
        { //in these brackets schould be some code with sense, if i´m getting it to run
        }
        else
        {
        }

    }  if(curReach == internetReach)  {   }  if(curReach == wifiReach)  {
 }   }

//Called by Reachability whenever
status changes.
- (void) reachabilityChanged: (NSNotification* )note {
 Reachability* curReach = [note
object];  NSParameterAssert([curReach
isKindOfClass: [Reachability class]]);
 [self
updateInterfaceWithReachability:
curReach]; }


- (void)applicationDidFinishLaunching:(UIApplication
*)application {
    // Override point for customization after application launch
   // Observe the
kNetworkReachabilityChangedNotification.
When that notification is posted, the
    // method "reachabilityChanged" will be called.  //
[[NSNotificationCenter defaultCenter]
addObserver: self selector:
@selector(reachabilityChanged:) name:
kReachabilityChangedNotification
object: nil];

    //Change the host name here to change the server your monitoring
 hostReach = [[Reachability
reachabilityWithHostName:
@"www.apple.com"] retain];  [hostReach
startNotifer];  [self
updateInterfaceWithReachability:
hostReach];

    internetReach = [[Reachability reachabilityForInternetConnection]
retain];  [internetReach
startNotifer];  [self
updateInterfaceWithReachability:
internetReach];

    wifiReach = [[Reachability reachabilityForLocalWiFi] retain];
 [wifiReach startNotifer];  [self
updateInterfaceWithReachability:wifiReach];
     [window addSubview:[navigationController
view]];
    [window makeKeyAndVisible]; }


- (void)dealloc {  [navigationController release];
    [window release];
    [super dealloc]; }


@end

最佳答案

忘了它。我只是不知道我必须手动添加systemconfiguration-framework。我以为它将在导入时添加。

关于iphone - 从苹果复制了可达性测试，但链接器失败，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/2788354/