Question

我正在使用此代码检查互联网连接，但我发现了+[Reachability reachabilityForInternetConnection]: unrecognized selector sent to class 0xcbe0c8

的崩溃

我导入了Reachability .h/.m和systemconfig框架。崩溃位于self.internetRechable = [[Reachability reachabilityForInternetConnection] retain];

行

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(checkNetworkStatus:) name:kReachabilityChangedNotification object:nil];

    self.internetRechable = [[Reachability reachabilityForInternetConnection] retain];
    [self.internetRechable startNotifier];

    // check if a pathway to a random host exists
    self.hostReachable = [[Reachability reachabilityWithHostName: @"www.apple.com"] retain];
    [self.hostReachable startNotifier];

- (void) checkNetworkStatus:(NSNotification *)notice
{
    // called after network status changes

    NetworkStatus internetStatus = [self.internetRechable currentReachabilityStatus];
    switch (internetStatus)
    {
        case NotReachable:
        {
            NSLog(@"The internet is down.");
//            self.internetActive = NO;
            break;
        }
        case ReachableViaWiFi:
        {
            NSLog(@"The internet is working via WIFI.");
//            self.internetActive = YES;
            break;
        }
        case ReachableViaWWAN:
        {
            NSLog(@"The internet is working via WWAN.");
//            self.internetActive = YES;
            break;
        }
    }

    NetworkStatus hostStatus = [self.hostReachable currentReachabilityStatus];
    switch (hostStatus)
    {
        case NotReachable:
        {
            NSLog(@"A gateway to the host server is down.");
//            self.hostActive = NO;
            break;
        }
        case ReachableViaWiFi:
        {
            NSLog(@"A gateway to the host server is working via WIFI.");
//            self.hostActive = YES;
            break;
        }
        case ReachableViaWWAN:
        {
            NSLog(@"A gateway to the host server is working via WWAN.");
//            self.hostActive = YES;
            break;
        }
    }
}

Answer 1

确保您的Reachability版本为2.2：最近发生了一些变化，如果您不使用2.2，可能会导致崩溃。

以下是版本2.2的链接 Reachability.h和Reachability.m

另外，如果它有帮助，那么我的工作代码就是同一个任务：。

在我的appDidFinishLaunching中hostReachable和internetReachable是我的应用代表的ivars：

//....
if ([[Reachability reachabilityWithHostName:@"google.com"] currentReachabilityStatus] == NotReachable) {
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(checkNetworkStatus:) name:kReachabilityChangedNotification object:nil];
    internetReachable = [[Reachability reachabilityForInternetConnection] retain];
    [internetReachable startNotifier];
    hostReachable = [[Reachability reachabilityWithHostName:@"google.com"] retain];
    [hostReachable startNotifier];
}

然后，回调：

- (void)checkNetworkStatus:(NSNotification *)notice {
    NetworkStatus internetStatus = [internetReachable currentReachabilityStatus];
    switch (internetStatus) {
        case NotReachable:
            self.internetActive = NO;
            break;
        case ReachableViaWiFi:
            self.internetActive = YES;
            break;
        case ReachableViaWWAN:
            self.internetActive = YES;
            break;
    }
    NetworkStatus hostStatus = [hostReachable currentReachabilityStatus];
    switch (hostStatus) {
        case NotReachable:
            self.hostActive = NO;
            break;
        case ReachableViaWiFi:
            self.hostActive = YES;
            break;
        case ReachableViaWWAN:
            self.hostActive = YES;
            break;
    }
    if (internetActive && hostActive) {
        [self refreshAllData];
    }
}

Answer 2

你应该关闭ARC。转到构建阶段，选择此调用并双击右边缘并键入

-fno -objc -arc

我认为你也可以放弃保留代码。

使用可访问性类检查Internet连接时应用程序崩溃

2 个答案: