Question

我的应用使用iCloud进行同步。在我的主视图中，控制器的viewWillAppear：

// Configure persistant store on iCloud

    NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(TodayViewController.persistentStoreDidChange), name: NSPersistentStoreCoordinatorStoresDidChangeNotification, object: nil)
    NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(TodayViewController.persistentStoreWillChange(_:)), name: NSPersistentStoreCoordinatorStoresWillChangeNotification, object: managedObjectContext.persistentStoreCoordinator)
    NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(TodayViewController.recieveICloudChanges(_:)), name: NSPersistentStoreDidImportUbiquitousContentChangesNotification, object: managedObjectContext.persistentStoreCoordinator)

和viewWillDisappear：

override func viewWillDisappear(animated: Bool) {
    NSNotificationCenter.defaultCenter().removeObserver(self, name: NSPersistentStoreCoordinatorStoresDidChangeNotification, object: nil)
    NSNotificationCenter.defaultCenter().removeObserver(self, name: NSPersistentStoreCoordinatorStoresWillChangeNotification, object: managedObjectContext.persistentStoreCoordinator)
    NSNotificationCenter.defaultCenter().removeObserver(self, name: NSPersistentStoreDidImportUbiquitousContentChangesNotification, object: managedObjectContext.persistentStoreCoordinator)
}

但是，有时这需要太慢才能同步。我希望用户通过点击按钮来强制同步，或者通过向下滑动tableView来刷新（重新同步）。我该怎么做？

@IBAction forceSyncButton（）{

**这里放什么？**

}

谢谢你！

Answer 1

您似乎正在使用Core Data的内置iCloud支持。遗憾的是，没有强制同步发生的公共API。它会自动处理，您的应用无法更改计划。

通过按钮强制与iCloud同步

1 个答案: