您如何等待应用程序在OS X中关闭? [英] How do you wait for an application to close in OS X?

问题描述

我正在使用下面的代码检查应用程序是否正在运行并关闭.有人可以提供一个示例，说明如何请求取消申请并等待其关闭才能继续吗?

I am using the code below to check if an application is running and close it. Can someone provide an example of how to request an application calose and wait for it to close before proceeding?

+ (BOOL)isApplicationRunningWithName:(NSString *)applicationName {
    BOOL isAppActive = NO;
    NSDictionary *aDictionary;
    NSArray *selectedApps = [[NSWorkspace sharedWorkspace] runningApplications];

    for (aDictionary in selectedApps) {
        if ([[aDictionary valueForKey:@"NSApplicationName"] isEqualToString: applicationName]) {
            isAppActive = YES;
            break;
        }
    }
    return isAppActive;
}

+ (void)stopApplication:(NSString *)pathToApplication {
    NSString *appPath = [[NSWorkspace sharedWorkspace] fullPathForApplication:pathToApplication];
    NSString *identifier = [[NSBundle bundleWithPath:appPath] bundleIdentifier];
    NSArray *selectedApps = [NSRunningApplication runningApplicationsWithBundleIdentifier:identifier];
    // quit all
    [selectedApps makeObjectsPerformSelector:@selector(terminate)];
}

推荐答案

您可以使用

You can use Key-Value Observing to observe the terminated property of each running application. This way, you'll get notified when each application terminates, without having to poll.

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