Question

我正在开发我的第一个MacOS应用程序，我将Objective-C与Swift联系起来，我还有很多需要学习的东西。

我认为我已经声明并链接了所有内容，但由于某种原因，编译器会提示此错误。

Use of undeclared identifier 'EventToSend'

EventToSend是一个AEEventID类型，我声明在函数原型和Header文件中，桥接头文件也有import语句。我要做的是将Timer实现为休眠和重启函数，以便等待计时器在执行之前到期。

有人可以指出我做错了吗？

classFunctions.m

#include <stdio.h>
#include <CoreServices/CoreServices.h>
#include <Carbon/Carbon.h>
#include <Foundation/Foundation.h>
#import "Header.h"

@implementation intOb : NSObject

static OSStatus SendAppleEventToSystemProcess(AEEventID EventToSend);
int executeSleep(void);
int executeRestart(void);
int executeShutDown(void);

- (OSStatus) SendAppleEventToSystemProcess{
    AEAddressDesc targetDesc;
    static const ProcessSerialNumber kPSNOfSystemProcess = { 0, kSystemProcess };
    AppleEvent eventReply = {typeNull, NULL};
    AppleEvent appleEventToSend = {typeNull, NULL};

    OSStatus error = noErr;

    error = AECreateDesc(typeProcessSerialNumber, &kPSNOfSystemProcess,
                         sizeof(kPSNOfSystemProcess), &targetDesc);

    if (error != noErr)
    {
        return(error);
    }
    //the error appears here
    error = AECreateAppleEvent(kCoreEventClass, EventToSend, &targetDesc, kAutoGenerateReturnID, kAnyTransactionID, &appleEventToSend); 

    AEDisposeDesc(&targetDesc);
    if (error != noErr)
    {
        return(error);
    }

    error = AESend(&appleEventToSend, &eventReply, kAENoReply,
                   kAENormalPriority, kAEDefaultTimeout, NULL, NULL);
    AEDisposeDesc(&appleEventToSend);
    if (error != noErr)
    {
        return(error);
    }

    AEDisposeDesc(&eventReply);

    return(error);
}

- (int) executeSleep{
    OSStatus error = noErr;
    error = SendAppleEventToSystemProcess(kAESleep);
    if (error == noErr)
    {
        printf("Computer is going to sleep!\n");
        return error;
    }
    else
    {
        printf("Computer wouldn't sleep");
        return error;
    }
}

- (int) executeRestart{
    OSStatus error = noErr;
    error = SendAppleEventToSystemProcess(kAERestart);
    if (error == noErr)
    {
        printf("Computer is going to restart!\n");
        return error;
    }
    else
    {
        printf("Computer wouldn't restart\n");
        return error;
    }
}

- (int) executeShutDown{
    OSStatus error = noErr;
    error = SendAppleEventToSystemProcess(kAEShutDown);
    if (error == noErr)
    {
        printf("Computer is going to shutdown!\n");
        return error;
    }
    else
    {
        printf("Computer wouldn't shutdown\n");
        return error;
    }
}
@end

Header.h

#ifndef Header_h
#define Header_h

#import <Foundation/Foundation.h>

@interface intOb : NSObject

- (OSStatus) SendAppleEventToSystemProcess;
- (int) executeSleep;
- (int) executeRestart;
- (int) executeShutDown;

@end

#endif /* Header_h */

FTEST-桥接-Header.h

#import "Header.h"

ViewController.swift

import Cocoa
class ViewController: NSViewController {

    override func viewDidLoad() {
        super.viewDidLoad()

        // Do any additional setup after loading the view.
        let obj: intOb = intOb()
        var sequentialAction: Timer!
        sequentialAction = Timer.scheduledTimer(timeInterval: 5, target: self, selector: #selector(obj.executeSleep), userInfo: nil, repeats: true)
        sequentialAction.invalidate()
    }

    override var representedObject: Any? {
        didSet {
        // Update the view, if already loaded.
        }
    }
}

Answer 1

在classFunctions.h

中添加此代码

@property（非原子，强）AEEventID * EventToSend;

使用未声明的标识符'EventToSend'

1 个答案: