通过Xcode命令行工具发送本地通知

Question

我必须开发一个微型程序，以便在Mac上发送本地通知。 该通知必须每30秒发送一次，因此我使用Xcode创建了一个命令行工具，然后选择在Objective-C中进行开发。 Xcode向我显示了main.m文件，在其中我编写了以下代码：

的main.m

#import <Foundation/Foundation.h>
#import "Notification.h"

int main(int argc, const char * argv[]) {
    @autoreleasepool {
        Notification *notification = [[Notification alloc]init];
        [notification startNotification];
    }
    return 0;
}

在Notification这是一个我启动计时器并发送通知的类，代码是：

Notification.h

@interface Notification : NSObject <NSUserNotificationCenterDelegate>

- (void) startNotification;

@end

Notification.m

#import <Foundation/Foundation.h>
#import <Cocoa/Cocoa.h>
#import "Notification.h"

@implementation Notification : NSObject

- (void) startNotification {
    NSTimer *timer = [[NSTimer alloc]init];
    if (timer == nil) {
        timer = [NSTimer scheduledTimerWithTimeInterval:30.0 target:self selector:@selector(sendNotification) userInfo:nil repeats:YES];
    }
}

- (void)sendNotification {
    NSUserNotification *notification = [[NSUserNotification alloc]init];
    notification.title = @"Prova";
    notification.informativeText = @"Ciao Salame";
    notification.soundName = NSUserNotificationDefaultSoundName;

    [[NSUserNotificationCenter defaultUserNotificationCenter] deliveredNotifications];

    NSUserNotificationCenter *center = [NSUserNotificationCenter defaultUserNotificationCenter];
    [center scheduleNotification:notification];
    [center setDelegate:self];
}

- (void) userNotificationCenter:(NSUserNotificationCenter *)center didActivateNotification:(NSUserNotification *)notification {
    NSAlert *alert = [[NSAlert alloc]init];
    [alert addButtonWithTitle:@"OK"];
    [alert setMessageText:notification.title];
    [alert setInformativeText:notification.informativeText];
    [alert setAlertStyle:NSWarningAlertStyle];
    [alert runModal];
    [center removeDeliveredNotification:notification];
}

@end

当我运行该应用程序时，它没有调用选择器方法，并且运行完毕，这在我的小程序中出了什么问题？ 你能帮我解决吗？

谢谢

AppleScript的

我创建了一个小的AppleScript，并且运行良好，我使用的代码如下：

on idle

    display notification "Lorem ipsum dolor sit amet" with title "Title"

    return 30

end idle

然后我使用此脚本创建了一个应用，该应用将在系统启动时执行，并且每30秒发送一次通知。 我不确定这是否是正确的方法，但是它在起作用...

从这里看

Objective-C的

我尝试按照以下方式更新代码：

Notification.m

#import <Foundation/Foundation.h>
#import <Cocoa/Cocoa.h>
#import "Notification.h"

@implementation Notification : NSObject

- (void) startNotification {
    NSUserNotification *notification = [[NSUserNotification alloc]init];
    notification.title = @"Prova";
    notification.informativeText = @"Ciao Salame";
    notification.soundName = NSUserNotificationDefaultSoundName;

    [[NSUserNotificationCenter defaultUserNotificationCenter] deliveredNotifications];

    NSUserNotificationCenter *center = [NSUserNotificationCenter defaultUserNotificationCenter];
    [center scheduleNotification:notification];
    [center setDelegate:self];
    sleep(30);

}

- (void) userNotificationCenter:(NSUserNotificationCenter *)center didActivateNotification:(NSUserNotification *)notification {
    NSAlert *alert = [[NSAlert alloc]init];
    [alert addButtonWithTitle:@"OK"];
    [alert setMessageText:notification.title];
    [alert setInformativeText:notification.informativeText];
    [alert setAlertStyle:NSWarningAlertStyle];
    [alert runModal];
    [center removeDeliveredNotification:notification];
}

但它没有向我发送通知...

Answer 1

原因是，您的应用程序在实例化Notification之后直接返回。 仅调用startNotification不会阻止应用返回。 可能您想让它在后台的线程内运行。