将objective-c 完成处理程序传递给swift

Question

使用ios pushkit didReceiveIncomingPushWithPayload; 调用并传递多个参数，包括 withCompletionHandler。 withCompletionHandler 的函数调用、接口和 swift 参数是什么样的？

AppDelegate.m

- (void)pushRegistry:(PKPushRegistry *)registry
  didReceiveIncomingPushWithPayload:(PKPushPayload *)payload
             forType:(PKPushType)type
  withCompletionHandler:(void (^)(void))completion{
  NSLog(@"VHC: AppDelegate - didReceiveIncomingPushWithPayload hit!");
  Voip* instance = [Voip new];
  [instance handleIncomingPush:payload forType:type withCompletionHandler:completion];
}

语音文件

-(void)handleIncomingPush: (PKPushPayload *)payload forType:(PKPushType)type withCompletionHandler:(void (^)(void))completion;

网络电话

 @objc(handleIncomingPush: : :)
  func handleIncomingPush(_ payload: PKPushPayload, forType: PKPushType, withCompletionHandler: @escaping () -> Void) {
    withCompletionHandler()
}

错误

*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[Voip handleIncomingPush:forType:withCompletionHandler:]: unrecognized selector sent to instance 0x2806f4f30'

Answer 1

几个观察：

1. @objc方法名称不对。 鉴于您的 Swift 方法签名与您在 Objective-C 代码中寻找的内容相匹配，您只需删除手动方法名称：

    class Voip: NSObject { @objc func handleIncomingPush(_ payload: PKPushPayload, forType: PKPushType, withCompletionHandler: @escaping () -> Void) { withCompletionHandler() } }

   或者，就个人而言，如果需要，我会使用 Swiftier 方法签名并声明 ObjC 接口：

    class Voip: NSObject { @objc(handleIncomingPush:forType:withCompletionHandler:) func handleIncomingPush(_ payload: PKPushPayload, type: PKPushType, completionHandler: @escaping () -> Void) { completionHandler() } }

2. 删除Voip.h标头。 一直只使用“Objective-C 生成的接口头文件”。

3. 不要在 Objective-C 代码中导入Voip.h ，而是导入生成的接口标头。 例如，如果您的应用名为MyApp ，那么它可能只是：

    #import <MyApp-Swift.h>

   如果您不清楚名称是什么，请查看“Objective-C Generated Interface Header File”设置的目标设置。