以编程方式更改屏幕保护程序设置

Question

我正在尝试以编程方式更改配置的屏幕保护程序。

如果我这样做

$ defaults -currentHost read com.apple.screensaver
{
    CleanExit = YES;
    PrefsVersion = 100;
    idleTime = 600;
    moduleDict =     {
        moduleName = XXXX;
        path = "/Users/juanjo/Library/Screen Savers/XXXX.saver";
        type = 0;
    };
    showClock = 0;
}

我可以看到该信息，甚至可以使用写入参数更新它。

此设置无法通过 NSUserDefaults 访问，但可以通过 CF 访问。

我可以通过代码做到这一点

var moduleDict = CFPreferencesCopyAppValue("moduleDict", "com.apple.screensaver") as CFDictionary

但是当我试图从中获取一个值时 "dict" 程序在这一行崩溃：

var saverName = CFDictionaryGetValue(moduleDict, "moduleName")

说 EXC_BAD_ACCESS (code=EXC_I386_GPFLT).

那么，你知道我如何读取这个值并写回吗？

Answer 1

正如我在 Cocoa-开发列表中提到的那样，我可以这样做。

阅读中：

var moduleDict = CFPreferencesCopyAppValue("moduleDict", "com.apple.screensaver") as NSDictionary
var saverName = moduleDict["moduleName"] as String!

写作：

var moduleDict = CFPreferencesCopyAppValue("moduleDict", "com.apple.screensaver") as NSDictionary
var mutable = moduleDict.mutableCopy() as NSMutableDictionary
mutable["moduleName"] = "MyScreenSaver"
mutable["path"] = mySaverPath
CFPreferencesSetValue("moduleDict", mutable as CFPropertyList, "com.apple.screensaver", kCFPreferencesCurrentUser, kCFPreferencesCurrentHost)
CFPreferencesAppSynchronize("com.apple.screensaver")

以编程方式更改屏幕保护程序设置

Programmatically change screen saver settings

macos

swift

core-foundation