我想为 iOS 构建一个应用程序。这个想法是UILocalNotification在呼叫状态为 时启动一个Connected。我尝试dispatch_async在方法中使用一个块，applicationDidEnterBackground并在这个块中放入一个循环while(!isConnected)以了解何时应该UILocalNotificacion启动。循环检查呼叫状态并决定何时启动通知。
我需要知道的是，那是解决我问题的正确方法吗？还是有人有更好的主意？
好的，这是我的代码：
- (void)applicationDidEnterBackground:(UIApplication *)application
{
// Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later.
// If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
isAlive = YES;
NSLog(@"BackgroundTimerRemaining %f", [application backgroundTimeRemaining]);
// verufy status of call
bgTask = [application beginBackgroundTaskWithExpirationHandler:^{
// Clean up any unfinished task business by marking where you
// stopped or ending the task outright.
[application endBackgroundTask:bgTask];
bgTask = UIBackgroundTaskInvalid;
}];
[self readLocalVariableCalling];
__block int connected = 0;
__block int callingTemp = 1;//((NSNumber*)[self.datos objectForKey:@"calling"]).intValue;
NSLog(@"callingTemp: %d", callingTemp);
__strong typeof(self) weakSelf = self;
// Start the long-running task and return immediately.
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
@autoreleasepool
{
//isAlive = YES;
// Do the work associated with the task, preferably in chunks.
while (callingTemp == 1)
{
if (callCenter != nil)
{
callCenter.callEventHandler = ^(CTCall* call)
{
NSLog(@"Loop - Call EventHandler state: %@", call.callState);
if([call.callState isEqualToString:CTCallStateDisconnected])
{
NSLog(@"disconnected");
[[UIApplication sharedApplication] cancelAllLocalNotifications];
callingTemp = 0;
connected = 0;
[weakSelf.datos setObject:[NSNumber numberWithInt:0] forKey:@"calling"];
[weakSelf saveLocalVariableCalling];
}
if ([call.callState isEqualToString:CTCallStateDialing] &&
connected == 0)
{
NSLog(@"connected - Call EventHandler state : %@", call.callState);
connected = 1;
if (callingTemp == 1
&& weakSelf.timerTableViewController.currentTimer)
{
TimeDto *currentTimer = weakSelf.timerTableViewController.currentTimer;
NSInteger seconds = currentTimer.value.intValue;
NSLog(@"minutos a segundos = %d", seconds);
NSDate *alertTime = [[NSDate date] dateByAddingTimeInterval:seconds];
UIApplication* app = [UIApplication sharedApplication];
if (weakSelf.notifyAlarm)
{
weakSelf.notifyAlarm.fireDate = alertTime;
weakSelf.notifyAlarm.timeZone = [NSTimeZone defaultTimeZone];
weakSelf.notifyAlarm.repeatInterval = 0;
weakSelf.notifyAlarm.soundName = @"road.caf";
NSString *messageTimer = NSLocalizedString(@"messageTimer", nil);
weakSelf.notifyAlarm.alertBody = [NSString stringWithFormat:messageTimer, ((int)currentTimer.value.intValue / 60 ) , (currentTimer.value.intValue % 60)];
[app scheduleLocalNotification:weakSelf.notifyAlarm];
}
}
}
};
}
else
{
NSLog(@"callCenter is null");
}
//NSLog(@"loop call state");
}
NSLog(@"Call Finished");
[application endBackgroundTask:bgTask];
bgTask = UIBackgroundTaskInvalid;
}
});
}