swift - 使用 objective-c++ 中的 swift (4.0) 类

Question

如何在 ios-project 中使用 objective-c++ 的 swift 类？

Apple 文档仅讨论 objective-c :https://developer.apple.com/library/content/documentation/Swift/Conceptual/BuildingCocoaApps/MixandMatch.html

我试过这样做-

Console.swift

public class Console : NSObject {
  public func Dump() -> Void {
      let log = OSLog(subsystem: Bundle.main.bundleIdentifier!, category: "Console")
      os_log("url = %@", log: log, "Some thing here")
  }
}

ConsoleDelegate.hpp

#ifndef ConsoleWrapper_h
#define ConsoleWrapper_h
#import <Foundation/Foundation.h>
#import <Interop-Swift.h>

@interface ConsoleDelegate : NSObject {
@private
  Console* console;
}

- (ConsoleDelegate*) init;
- (void) DumpWrapper;
@end
#endif /* ConsoleWrapper_h */

ConsoleDelegate.mm

#import "ConsoleDelegate.hpp"
#import <Foundation/Foundation.h>

@implementation ConsoleDelegate

- (ConsoleDelegate*) init {
  console = [[Console alloc] init];
  return self;
}

- (void) DumpWrapper {
  [console Dump];
}
@end

但我得到的错误是 -

/path/to/file/Interop-Swift.h:192:39: No type or protocol named 'UIApplicationDelegate'

如果我重命名 ConsoleDelegate.mm -> ConsoleDelegate.m 那么它编译没有任何错误。

Answer 1

好吧，我所要做的就是将 UIKit 包含在 ConsoleDelegate.hpp 中。

#ifndef ConsoleWrapper_h
#define ConsoleWrapper_h

#import <UIKit/UIkit.h>
#import <Foundation/Foundation.h>
#import <Interop-Swift.h>

@interface ConsoleDelegate : NSObject {
@private
  Console* console;
}

- (ConsoleDelegate*) init;
- (void) DumpWrapper;
@end
#endif /* ConsoleWrapper_h */