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elone
V2EX  ›  Flutter

Swift 闭包回调报错: C function pointer cannot be formed from a closure that captures context

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  •   elone · 2021-08-07 20:27:10 +08:00 · 609 次点击
    这是一个创建于 369 天前的主题,其中的信息可能已经有所发展或是发生改变。

    最近在写 flutter 跟 ios swift 原生通信的 demo,遇到一个问题,报这个错:

    C function pointer cannot be formed from a closure that captures context

    代码如下:

    
    
    @UIApplicationMain
    @objc class AppDelegate: FlutterAppDelegate {
      override func application(
        _ application: UIApplication,
        didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?
      ) -> Bool {
        GeneratedPluginRegistrant.register(with: self)
        
        let controller: FlutterViewController = window?.rootViewController as! FlutterViewController
    
        
        CFNotificationCenterAddObserver(center, Unmanaged.passUnretained(self).toOpaque(), { (center, observer, name, object, userInfo) in
                      
            NSLog("Notify received")
            CustomChannel.sendMessageToFlutter(controller: controller)
    
    
    public struct CustomChannel {
        
        static func sendMessageToFlutter(controller: FlutterViewController){
            let channel = FlutterMethodChannel(
                name: "paymentview",
                binaryMessenger: controller.binaryMessenger
            )
    
            DispatchQueue.main.async {
                channel.invokeMethod("authorized", arguments: nil)
                       }
        }
    }
    
    
    

    swift 现在是边学边写,这个闭包看起来有点看不懂。

    目前尚无回复
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