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];
}

Voip.h

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

Voip.swift

 @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

一些观察：

那个@objc方法名不对。鉴于您的 Swift 方法签名与您在 Objective-C 代码中查找的内容相匹配，您可以删除手动方法名称：

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

或者，就我个人而言，如果需要，我会使用 Swift 层方法签名并声明 ObjC 接口：

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

删除Voip.hheader。总是只使用“Objective-C 生成的接口 Header 文件”。
不要在 Objective-C 代码中导入 Voip.h，而是导入生成的接口 header。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 生成的界面 Header 文件”设置的目标设置。

将 objective-c 完成处理程序传递给 swift

Pass objective-c completion handler to swift

objective-c

ios

swift

pushkit

callkit