如何在xcode中使用Reachability進行評估Internet連接

Question

在iPhone中我是新手，我想知道如何在xcode中使用Reachability。 我繼續前往Reachability example並閱讀它，但瞭解它。 我創建了一個應用程序，並將Reachability.m和Reachability.h放入其中，但我不知道如何使用它。

請指導我。我想，當運行應用程序檢查網絡連接任何時間，運行此代碼：

if (isConnection) 
{ 
NSLog(@"Connection Success") 
} 
else 
NSLog(@"Connection has been lost") 

Answer 1

你可以這樣做：

Reachability *reachability = [Reachability reachabilityForInternetConnection]; 
NetworkStatus internetStatus = [reachability currentReachabilityStatus]; 

現在檢查internetStatus變種，通過檢查它的價值。該值被定義爲：

typedef enum 
{ 
    // Apple NetworkStatus Compatible Names. 
    NotReachable  = 0, 
    ReachableViaWiFi = 2, 
    ReachableViaWWAN = 1 
} NetworkStatus; 

所以，你的情況：

if (internetStatus == NotReachable) 
{ 
    NSLog(@"Bazinga!"); 
} 
else 
{ 
    NSLog(@"Houston we have ignition"); 
} 

Answer 2

下載可達性類和關注這個代碼

internetReach = [[Reachability reachabilityForInternetConnection] retain]; 
[internetReach startNotifier]; 

然後我們將設置中創建的NetworkStatus變量可達性。

NetworkStatus netStatus = [internetReach currentReachabilityStatus]; 

最後我們將在交換機模塊中使用netStatus。

switch (netStatus) 
{    
    case ReachableViaWWAN: 
    { 
     break; 
    } 
    case ReachableViaWiFi: 
    { 
     break; 
    } 
    case NotReachable: 
    { 
     UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Alert" message:@"We are unable to make a internet connection at this time. Some functionality will be limited until a connection is made." delegate:self cancelButtonTitle:@"OK" otherButtonTitles: nil]; 
     [alert show]; 
     [alert release]; 
     break; 
    } 

} 

- (void) reachabilityChanged: (NSNotification*)note 
{ 
    Reachability* curReach = [note object]; 
    NSParameterAssert([curReach isKindOfClass: [Reachability class]]); 

    NetworkStatus netStatus = [curReach currentReachabilityStatus]; 
    switch (netStatus) 
    { 
     case ReachableViaWWAN: 
     { 
      break; 
     } 
     case ReachableViaWiFi: 
     { 
      break; 
     } 
     case NotReachable: 
     { 
      UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Alert" message:@"We are unable to make a internet connection at this time. Some functionality will be limited until a connection is made." delegate:self cancelButtonTitle:@"OK" otherButtonTitles: nil]; 
      [alert show]; 
      [alert release]; 
      break; 
     } 
    } 
}