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如何关闭 Mac 屏幕保护程序？

发布于 2024-09-04 22:41:55 字数 146 浏览 4 评论 0原文

我正在编写一个使用 Apple 的信息亭模式的应用程序。我想禁用屏幕保护程序，但“ScreenSaverDefaults”类将其自身报告为仅 32 位。我可以将构建更改为仅 32 位，但我也希望能够支持 64 位架构。

我还应该使用其他框架来禁用屏幕保护程序吗？

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转角预定愛 2024-09-11 22:41:55

首先，您需要保存当前设置，以便可以将其恢复到关闭之前的状态：

NSTask *readTask = [[NSTask alloc] init];
[readTask setLaunchPath:@"/usr/bin/defaults"];

NSArray *arguments = [NSArray arrayWithObjects:@"-currentHost", @"read", @"com.apple.screensaver", @"idleTime", nil];
[readTask setArguments:arguments];

NSPipe *pipe = [NSPipe pipe];
[readTask setStandardOutput:pipe];

NSFileHandle *file = [pipe fileHandleForReading];

[readTask launch];
[readTask release];

NSData *data = [file readDataToEndOfFile];

NSString *originalValue = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];

现在您拥有了屏幕保护程序空闲时间的原始值。伟大的！不要失去那个。现在，您必须设置新值：

NSTask *writeTask = [[NSTask alloc] init];
[writeTask setLaunchPath:@"/usr/bin/defaults"];

NSArray *arguments = [NSArray arrayWithObjects:@"-currentHost", @"write", @"com.apple.screensaver", @"idleTime", @"0", nil];
[writeTask setArguments:arguments];

[writeTask launch];
[writeTask release];

还有中提琴！您刚刚禁用了屏幕保护程序。要重新启用它，只需再次使用第二个代码块，但传入 OriginalValue 作为最后一个数组对象而不是 @"0"，如下所示：

NSArray *arguments = [NSArray arrayWithObjects:@"-currentHost", @"write", @"com.apple.screensaver", @"idleTime", originalValue, nil]

享受！
Billy

P.S.：最后一件事，您可能会想保存 NSTask 对象以重新使用它们，但不要这么做。它们只能运行一次，因此每次您想要执行此操作时都必须创建新的。

First, you need to save the current setting, so you can put it back the way it was before you turned it off:

NSTask *readTask = [[NSTask alloc] init];
[readTask setLaunchPath:@"/usr/bin/defaults"];

NSArray *arguments = [NSArray arrayWithObjects:@"-currentHost", @"read", @"com.apple.screensaver", @"idleTime", nil];
[readTask setArguments:arguments];

NSPipe *pipe = [NSPipe pipe];
[readTask setStandardOutput:pipe];

NSFileHandle *file = [pipe fileHandleForReading];

[readTask launch];
[readTask release];

NSData *data = [file readDataToEndOfFile];

NSString *originalValue = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];

So now you have the original value for the screensaver's idleTime. Great! Don't lose that. Now, you have to set the new value:

NSTask *writeTask = [[NSTask alloc] init];
[writeTask setLaunchPath:@"/usr/bin/defaults"];

NSArray *arguments = [NSArray arrayWithObjects:@"-currentHost", @"write", @"com.apple.screensaver", @"idleTime", @"0", nil];
[writeTask setArguments:arguments];

[writeTask launch];
[writeTask release];

And viola! You've just disabled the screensaver. To re-enable it, just use the second block of code again, but pass in originalValue as the last array object rather than @"0", like so:

NSArray *arguments = [NSArray arrayWithObjects:@"-currentHost", @"write", @"com.apple.screensaver", @"idleTime", originalValue, nil]

Enjoy!
Billy

P.S.: One last thing, you may be tempted to save the NSTask objects to re-use them, but don't. They can only be run once, so you'll have to create new ones every time you want to do this.

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