Cocoa 禁止APP多重启动

最新推荐文章于 2025-08-13 09:39:48 发布

转载最新推荐文章于 2025-08-13 09:39:48 发布 · 496 阅读

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#cocoa #app #objectivec

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本文介绍了一种在应用启动时防止多个实例运行的方法。通过检查是否有其他实例正在运行来决定当前实例是否继续运行，若已有实例运行，则弹出提示并退出当前实例。

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启动时阻止多开

- (void)applicationDidFinishLaunching:(NSNotification *)aNotification {
    [self.window setIsVisible:NO];
    [AppDelegate deduplicateRunningInstances];
    [self.window setIsVisible:YES];
}

具体实现

+ (void)deduplicateRunningInstances {
    if ([[NSRunningApplication runningApplicationsWithBundleIdentifier:[[NSBundle mainBundle] bundleIdentifier]] count] > 1) {
        // deprecated
        //        [[NSAlert alertWithMessageText:[NSString stringWithFormat:@"Another copy of %@ is already running.", [[NSBundle mainBundle] objectForInfoDictionaryKey:(NSString *)kCFBundleNameKey]]
        //                         defaultButton:nil alternateButton:nil otherButton:nil informativeTextWithFormat:@"This copy will now quit."] runModal];
        NSAlert *alert = [[NSAlert alloc] init];
        [alert setMessageText:[NSString stringWithFormat:@"Another copy of %@ is already running.",[[NSBundle mainBundle] objectForInfoDictionaryKey:(NSString *)kCFBundleNameKey]]];
        [alert setInformativeText:@"This copy will now quit."];
        [alert runModal];

        [NSApp terminate:nil];
    }
}