升级到iOS 9后。我的应用程序有个奇怪的问题。
问题:每当网络可达性改变时，应用程序的视图就会冻结。它不响应任何触摸事件。它也没有崩溃。我检查了日志。唯一的变化是网络可达性。
更多信息:
1)如果你退出应用程序，并再次打开互联网在线，它工作正常。
2)如果我在离线状态下打开应用程序，视图会冻结。这在iOS 8.4中不会发生。
我正在使用Reachability by Tony million库来检查在线/离线状态。
有人在升级到iOS 9后遇到同样的问题吗?
参考代码:self.appIsOnline = YES;
_reachability = [Reachability reachabilityWithHostName:@"www.google.com"];
__weak __typeof(self)weakSelf = self;
[_reachability setReachableBlock: ^(Reachability * reachability) {
NSLog(@"Online");
if (!weakSelf.appIsOnline)
{
weakSelf.appIsOnline = YES;
weakSelf.willShowAlertView = YES;
dispatch_async(dispatch_get_main_queue(), ^{
CustomAlertView *alertView = [[CustomAlertView alloc] initWithTitle:@"Warning" andMessage:@"The internet connection appears to be online. The app will switch to online mode now" delegate:weakSelf withButtons:@[@"OK"]];
alertView.shouldTapOutsideToClose = YES;
[alertView showInView:MAIN_WINDOW];
});
}
}];
[_reachability setUnreachableBlock:^(Reachability * reachability) {
NSLog(@"Offline");
if (weakSelf.appIsOnline)
{
[[NSNotificationCenter defaultCenter] postNotificationName:OFFLINE_STATE_NOTIFICATION object:nil];
weakSelf.appIsOnline = NO;
dispatch_async(dispatch_get_main_queue(), ^{
[[AppUtilities sharedUtilities] displayAlertViewWithTitle:@"Warning" andMessage:@"The internet connection appears to be offline. The app will switch to offline mode now"];
});
}
}];
[_reachability startNotifier];
看起来我的主UI线程被阻塞了，触发这个的是关闭wi-fi。我的线程跟踪如下所示。
Thread 1Queue : com.apple.main-thread (serial)
#0 0x38739130 in mach_msg_trap ()
#1 0x38738f30 in mach_msg ()
#2 0x265624ec in __CFRunLoopServiceMachPort ()
#3 0x26560872 in __CFRunLoopRun ()
#4 0x264b31e8 in CFRunLoopRunSpecific ()
#5 0x264b2fdc in CFRunLoopRunInMode ()
#6 0x2f757af8 in GSEventRunModal ()
#7 0x2a71818c in UIApplicationMain ()
#8 0x00117f20 in main
Thread 3Queue : com.apple.libdispatch-manager (serial)
#0 0x3874e3c0 in kevent_qos ()
#1 0x0067d5f6 in _dispatch_mgr_invoke ()
#2 0x0066ea76 in _dispatch_mgr_thread ()
com.apple.NSURLConnectionLoader (11)
#0 0x38739130 in mach_msg_trap ()
#1 0x38738f30 in mach_msg ()
#2 0x265624ec in __CFRunLoopServiceMachPort ()
#3 0x26560872 in __CFRunLoopRun ()
#4 0x264b31e8 in CFRunLoopRunSpecific ()
#5 0x264b2fdc in CFRunLoopRunInMode ()
#6 0x25e240ae in +[NSURLConnection(Loader) _resourceLoadLoop:] ()
#7 0x273747fc in __NSThread__start__ ()
#8 0x387ebc92 in _pthread_body ()
#9 0x387ebc06 in _pthread_start ()
#10 0x387e9a24 in thread_start ()
AFNetworking (12)#0 0x38739130 in mach_msg_trap ()
#1 0x38738f30 in mach_msg ()
#2 0x265624ec in __CFRunLoopServiceMachPort ()
#3 0x26560872 in __CFRunLoopRun ()
#4 0x264b31e8 in CFRunLoopRunSpecific ()
#5 0x264b2fdc in CFRunLoopRunInMode ()
#6 0x272a3d7c in -[NSRunLoop(NSRunLoop) runMode:beforeDate:] ()
#7 0x272f28ec in -[NSRunLoop(NSRunLoop) run] ()
#8 0x00122a2e in +[AFURLConnectionOperation networkRequestThreadEntryPoint:] at /Pods/AFNetworking/AFNetworking/AFURLConnectionOperation.m:168
#9 0x273747fc in __NSThread__start__ ()
#10 0x387ebc92 in _pthread_body ()
#11 0x387ebc06 in _pthread_start ()
#12 0x387e9a24 in thread_start ()
com.apple.CFSocket.private (13)#0 0x3874cfb4 in __select ()
#1 0x26567990 in __CFSocketManager ()
#2 0x387ebc92 in _pthread_body ()
#3 0x387ebc06 in _pthread_start ()
#4 0x387e9a24 in thread_start ()
我终于找到了真正的问题。它不具有可达性。这是由于我的CustomAlertView。每当可达性发生变化时，我的应用程序就会弹出一个警告，说离线/在线。它直接在我的主窗口上显示警告视图，像这样
[alertView showInView:MAIN_WINDOW];
,
#define MAIN_WINDOW [UIApplication sharedApplication].keyWindow
[alertView showInView:MAIN_WINDOW.rootViewController.view];