无法在应用程序委托和情节提要之间传递数据

Question

收到本地通知时，我需要将一个变量设置为NO。 在App Delegate中，我运行：

- (void)application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification *)notification {
if ([[notification alertBody] isEqualToString:@"Time To Wake Up"]) {
    NLAlarmViewController *vc = [[UIStoryboard storyboardWithName:@"MainStoryboard" bundle:nil] instantiateViewControllerWithIdentifier:@"AlarmVC"];
    [vc setStarted:NO];
    }
}

在视图控制器类中：

- (IBAction)twoTapsDetected:(UITapGestureRecognizer *)sender {
    NSLog(@"Two taps detected");
    if (started != YES ) {
        NSLog(@"Not Started");
    }
    else if (started != NO) {
        NSLog(@"Started");
    }
}

在日志中，我已经开始。 但是在App Delegate中，我将其设置为NO。 当我在Xcode中创建断点时，开始= YES，但应为NO。 也许我做错了什么？

Answer 1

在出现通知时，在appdelegate中执行带有标识符的segue。

- (void)application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification *)notification {
if ([[notification alertBody] isEqualToString:@"Time To Wake Up"]) {
    [self performSegueWithIdentifier:@"YourSegueIdentifier" sender:self];
    }
}

然后使用故事板委托方法

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
    //    // Make sure your segue name in storyboard is the same as this line
    if ([[segue identifier] isEqualToString:@"YourSegueIdentifier"]) {
        // Get reference to the destination view controller
    NLAlarmViewController *vc = (NLAlarmViewController *)[segue destinationViewController];

        // Pass any objects to the view controller here, like...
     [vc setStarted:NO];
    }
}