从AppDelegate调用重载部分 [英] Calling reload Sections from AppDelegate

问题描述

我正在构建一个用于跟踪BLE设备的应用程序，并且有一个委托(在appDelegate中)，该委托通过蓝牙更新了发现的设备的列表.

I am building an app to track BLE devices, and I have a delegate (in appDelegate) that updates the list of discovered devices over the bluetooth.

我需要在表视图中显示此设备，因此，当我发现一个设备时，我会在viewcontroller中调用一个刷新tableView的函数.

I need to display this devices in a tableview, so when I discover a device I call a function in viewcontroller that refreshes the tableView.

如果我从ViewController调用此函数，它将起作用，但是当我从AppDelegate调用该函数时，它不会执行任何操作，甚至不会出错.

If I call this function from ViewController it works, but when I call it from AppDelegate it doesn't do anything, not even an error.

AppDelegate:

AppDelegate:

//MARK: Discovered Device
func DeviceDiscovered(_ macAddress: String!, withName name: String!, ofType type: Int, andSignalStrength strength: Int) {
        discoveredList["\(entry["time"]!)"] = entry
        ViewController().refresh()
    }
}

ViewController:

ViewController:

func refresh() {
    self.tableView?.reloadSections(NSIndexSet(index: _sectionIndices.discoveredDevices.hashValue) as IndexSet, with: .none)
}

我在ViewController中添加了一个按钮，该按钮仅调用refresh()即可工作.或至少它会重新加载该部分，但createdList dict也不会在ViewController中更新，而是一次出现一个问题！

I added a button in ViewController that simply calls refresh() and it works. Or at least it reloads the section, but the discoveredList dict doesn't update in ViewController either, but one problem at a time!

感谢您的帮助！

推荐答案

问题是ViewController()不是您的视图控制器.这是一个新的单独实例.您需要引用到您的现有视图控制器.

The problem is that ViewController() is not your view controller. It is a new separate instance. You need to refer to your existing view controller.

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