xcode 使用 CGWindowListCopyWindowInfo 的最前面的窗口
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/5286274/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
Front most window using CGWindowListCopyWindowInfo
提问by user635064
In the documentation, it says that list of windows returned by this method:
在文档中，它说此方法返回的窗口列表：
CFArrayRef windowList = CGWindowListCopyWindowInfo(kCGWindowListOptionOnScreenOnly, kCGNullWindowID);
will return windows in order from front to back. But it doesn't...The front most window should be test, but here's the out of this array:
将按从前到后的顺序返回窗口。但它没有......最前面的窗口应该是测试，但这里是这个数组的外面：
2011-03-12 18:18:14.221 test[982:a0f] (
{
kCGWindowAlpha = 1;
kCGWindowBounds = {
Height = 22;
Width = 212;
X = 1662;
Y = 0;
};
kCGWindowIsOnscreen = 1;
kCGWindowLayer = 25;
kCGWindowMemoryUsage = 30104;
kCGWindowName = "";
kCGWindowNumber = 14;
kCGWindowOwnerName = SystemUIServer;
kCGWindowOwnerPID = 99;
kCGWindowSharingState = 1;
kCGWindowStoreType = 2;
},
{
kCGWindowAlpha = 0;
kCGWindowBounds = {
Height = 22;
Width = 1920;
X = 0;
Y = 0;
};
kCGWindowIsOnscreen = 1;
kCGWindowLayer = 25;
kCGWindowMemoryUsage = 5528;
kCGWindowNumber = 15;
kCGWindowOwnerName = SystemUIServer;
kCGWindowOwnerPID = 99;
kCGWindowSharingState = 1;
kCGWindowStoreType = 2;
},
{
kCGWindowAlpha = 1;
kCGWindowBounds = {
Height = 22;
Width = 46;
X = 1874;
Y = 0;
};
kCGWindowIsOnscreen = 1;
kCGWindowLayer = 25;
kCGWindowMemoryUsage = 5528;
kCGWindowName = "";
kCGWindowNumber = 12;
kCGWindowOwnerName = SystemUIServer;
kCGWindowOwnerPID = 99;
kCGWindowSharingState = 1;
kCGWindowStoreType = 2;
},
{
kCGWindowAlpha = 1;
kCGWindowBounds = {
Height = 22;
Width = 1920;
X = 0;
Y = 0;
};
kCGWindowIsOnscreen = 1;
kCGWindowLayer = 24;
kCGWindowMemoryUsage = 218520;
kCGWindowName = "Shared Menubar";
kCGWindowNumber = 6;
kCGWindowOwnerName = "Window Server";
kCGWindowOwnerPID = 73;
kCGWindowSharingState = 2;
kCGWindowStoreType = 2;
},
{
kCGWindowAlpha = 1;
kCGWindowBounds = {
Height = 1058;
Width = 1920;
X = 0;
Y = 22;
};
kCGWindowIsOnscreen = 1;
kCGWindowLayer = 20;
kCGWindowMemoryUsage = 1200;
kCGWindowNumber = 13;
kCGWindowOwnerName = Dock;
kCGWindowOwnerPID = 98;
kCGWindowSharingState = 1;
kCGWindowStoreType = 1;
},
{
kCGWindowAlpha = 1;
kCGWindowBounds = {
Height = 52;
Width = 676;
X = 622;
Y = 1028;
};
kCGWindowIsOnscreen = 1;
kCGWindowLayer = 19;
kCGWindowMemoryUsage = 157080;
kCGWindowName = "Magic Mirror";
kCGWindowNumber = 16;
kCGWindowOwnerName = Dock;
kCGWindowOwnerPID = 98;
kCGWindowSharingState = 2;
kCGWindowStoreType = 2;
},
{
kCGWindowAlpha = 1;
kCGWindowBounds = {
Height = 382;
Width = 480;
X = 335;
Y = 367;
};
kCGWindowIsOnscreen = 1;
kCGWindowLayer = 0;
kCGWindowMemoryUsage = 792496;
kCGWindowName = test;
kCGWindowNumber = 252;
kCGWindowOwnerName = test;
kCGWindowOwnerPID = 982;
kCGWindowSharingState = 1;
kCGWindowStoreType = 2;
kCGWindowWorkspace = 1;
},
{
kCGWindowAlpha = 1;
kCGWindowBounds = {
Height = 807;
Width = 1206;
X = 321;
Y = 157;
};
kCGWindowIsOnscreen = 1;
kCGWindowLayer = 0;
kCGWindowMemoryUsage = 4055280;
kCGWindowName = "AppDelegate.m - test";
kCGWindowNumber = 24;
kCGWindowOwnerName = Xcode;
kCGWindowOwnerPID = 132;
kCGWindowSharingState = 1;
kCGWindowStoreType = 2;
kCGWindowWorkspace = 1;
},
{
kCGWindowAlpha = 1;
kCGWindowBounds = {
Height = 967;
Width = 960;
X = 175;
Y = 22;
};
kCGWindowIsOnscreen = 1;
kCGWindowLayer = 0;
kCGWindowMemoryUsage = 3817968;
kCGWindowName = "test - Debugger Console";
kCGWindowNumber = 31;
kCGWindowOwnerName = Xcode;
kCGWindowOwnerPID = 132;
kCGWindowSharingState = 1;
kCGWindowStoreType = 2;
kCGWindowWorkspace = 1;
},
{
kCGWindowAlpha = 1;
kCGWindowBounds = {
Height = 967;
Width = 1845;
X = 121;
Y = 22;
};
kCGWindowIsOnscreen = 1;
kCGWindowLayer = 0;
kCGWindowMemoryUsage = 882288;
kCGWindowName = "CocoaDev Forums - get focused window id";
kCGWindowNumber = 80;
kCGWindowOwnerName = "Google Chrome";
kCGWindowOwnerPID = 244;
kCGWindowSharingState = 1;
kCGWindowStoreType = 2;
kCGWindowWorkspace = 1;
},
{
kCGWindowAlpha = 1;
kCGWindowBounds = {
Height = 784;
Width = 885;
X = 560;
Y = 157;
};
kCGWindowIsOnscreen = 1;
kCGWindowLayer = 0;
kCGWindowMemoryUsage = 318768;
kCGWindowName = "Console Messages";
kCGWindowNumber = 125;
kCGWindowOwnerName = Console;
kCGWindowOwnerPID = 482;
kCGWindowSharingState = 1;
kCGWindowStoreType = 2;
kCGWindowWorkspace = 1;
},
{
kCGWindowAlpha = 1;
kCGWindowBounds = {
Height = 494;
Width = 1167;
X = 519;
Y = 417;
};
kCGWindowIsOnscreen = 1;
kCGWindowLayer = 0;
kCGWindowMemoryUsage = 2441264;
kCGWindowName = Debug;
kCGWindowNumber = 54;
kCGWindowOwnerName = Finder;
kCGWindowOwnerPID = 100;
kCGWindowSharingState = 1;
kCGWindowStoreType = 2;
kCGWindowWorkspace = 1;
},
{
kCGWindowAlpha = 1;
kCGWindowBounds = {
Height = 382;
Width = 480;
X = 335;
Y = 367;
};
kCGWindowIsOnscreen = 1;
kCGWindowLayer = 0;
kCGWindowMemoryUsage = 55216;
kCGWindowName = test;
kCGWindowNumber = 223;
kCGWindowOwnerName = test;
kCGWindowOwnerPID = 849;
kCGWindowSharingState = 1;
kCGWindowStoreType = 2;
kCGWindowWorkspace = 1;
},
{
kCGWindowAlpha = 1;
kCGWindowBounds = {
Height = 437;
Width = 770;
X = 396;
Y = 308;
};
kCGWindowIsOnscreen = 1;
kCGWindowLayer = 0;
kCGWindowMemoryUsage = 238512;
kCGWindowName = Applications;
kCGWindowNumber = 19;
kCGWindowOwnerName = Finder;
kCGWindowOwnerPID = 100;
kCGWindowSharingState = 1;
kCGWindowStoreType = 2;
kCGWindowWorkspace = 1;
},
{
kCGWindowAlpha = 1;
kCGWindowBounds = {
Height = 437;
Width = 770;
X = 450;
Y = 429;
};
kCGWindowIsOnscreen = 1;
kCGWindowLayer = 0;
kCGWindowMemoryUsage = 332720;
kCGWindowName = Applications;
kCGWindowNumber = 17;
kCGWindowOwnerName = Finder;
kCGWindowOwnerPID = 100;
kCGWindowSharingState = 1;
kCGWindowStoreType = 2;
kCGWindowWorkspace = 1;
},
{
kCGWindowAlpha = 1;
kCGWindowBounds = {
Height = 14;
Width = 1920;
X = 0;
Y = 22;
};
kCGWindowIsOnscreen = 1;
kCGWindowLayer = "-20";
kCGWindowMemoryUsage = 5528;
kCGWindowName = "Backstop Menubar";
kCGWindowNumber = 11;
kCGWindowOwnerName = "Window Server";
kCGWindowOwnerPID = 73;
kCGWindowSharingState = 1;
kCGWindowStoreType = 2;
},
{
kCGWindowAlpha = 1;
kCGWindowBounds = {
Height = 1080;
Width = 1920;
X = 0;
Y = 0;
};
kCGWindowIsOnscreen = 1;
kCGWindowLayer = "-2147483627";
kCGWindowMemoryUsage = 1200;
kCGWindowName = "";
kCGWindowNumber = 10;
kCGWindowOwnerName = Finder;
kCGWindowOwnerPID = 100;
kCGWindowSharingState = 1;
kCGWindowStoreType = 1;
},
{
kCGWindowAlpha = 1;
kCGWindowBounds = {
Height = 1080;
Width = 1920;
X = 0;
Y = 0;
};
kCGWindowIsOnscreen = 1;
kCGWindowLayer = "-2147483628";
kCGWindowMemoryUsage = 8328600;
kCGWindowName = Desktop;
kCGWindowNumber = 2;
kCGWindowOwnerName = "Window Server";
kCGWindowOwnerPID = 73;
kCGWindowSharingState = 2;
kCGWindowStoreType = 2;
}
)
What's SystemUIServer, dock and magic mirror? These aren't my front most apps. Thanks!
SystemUIServer、dock 和魔镜是什么？这些不是我最前面的应用程序。谢谢！
回答by skue
Grab a copy of Apple's sample app: Son Of Grab. Then build and run it, and you'll have a very handy interactive app for investigating all the windows known to the window server.
获取 Apple 示例应用程序的副本：Son Of Grab。然后构建并运行它，您将拥有一个非常方便的交互式应用程序，用于调查窗口服务器已知的所有窗口。
The answer to your question is that windows are ordered front to back, but there are far more user interface elements defined as windows than you are expecting. This includes the menubar, the dock, the services menu, the Desktop, etc. These are defined at different levels, corresponding to kCGWindowLayerin your output.
您的问题的答案是窗口是从前到后排序的，但是定义为窗口的用户界面元素比您预期的要多得多。这包括菜单栏、停靠栏、服务菜单、桌面等。这些是在不同级别定义的，对应kCGWindowLayer于您的输出。
You want the first window defined at the standard window level (zero). And if you look at your output, the first window with kCGWindowLayer == 0is in fact the 7th.
您需要在标准窗口级别（零）定义的第一个窗口。如果你看看你的输出，第一个窗口kCGWindowLayer == 0实际上是第 7 个。
回答by Rob Napier
SystemUIServer is the top menu bar. Dock is the Dock (usually at the bottom of the screen). I'm not familiar with "Magic Mirror." You can look for it on your system with lsregister:
SystemUIServer 是顶部菜单栏。Dock就是Dock（通常在屏幕底部）。我不熟悉“魔镜”。您可以使用以下命令在您的系统上查找它lsregister：
`locate lsregister` -dump
Search the output for "Magic Mirror".
在输出中搜索“魔镜”。
