我如何能得到一个所有窗口的列表，目前在屏幕上，以swift?
[英]How can I get a list of all windows, currently on the screen, in swift?
How can I get a list of all windows, currently on the screen, in swift? (all examples are preceded by import Cocoa)
我如何能得到一个所有窗口的列表，目前在屏幕上，以swift?(所有示例前面都有import Cocoa)
In objective-c I can run the following code successfully:
在objective-c中，我可以成功运行以下代码:
CFArrayRef windowList = CGWindowListCopyWindowInfo(kCGWindowListOptionOnScreenOnly, kCGNullWindowID);
But when I run the equivalent in swift(using the playground to test):
但是当我在swift跑的时候(用操场测试):
let windowList = CGWindowListCopyWindowInfo(kCGWindowListOptionOnScreenOnly, kcGNullWindowID)
I get an error telling me that I have an Use of unresolved identifier 'kcGNullWindowID'.
我得到一个错误，告诉我使用了未解析标识符'kcGNullWindowID'。
After playing around with the help of the quartz documentation for a while I have gotten to:
在quartz文档的帮助下玩了一段时间之后，我发现:
let windowList = CGWindowListCopyWindowInfo(CGWindowListOption(kCGWindowListOptionOnScreenOnly), CGWindowListOption(0))
But it still does not work as I am receiving a {__NSArrayM} object, which I do not know how to access.
但是它仍然不能工作，因为我正在接收一个{__NSArrayM}对象，我不知道如何访问它。
Am I on the right track or am I doing something fundamentally wrong?
我是走在正确的道路上，还是做了一些根本错误的事情?
3 个解决方案
#1
19
Here's an example in Swift 2.0, which also demonstrates multiple options.
下面是Swift 2.0中的一个示例，它还演示了多种选项。
let options = CGWindowListOption(arrayLiteral: CGWindowListOption.ExcludeDesktopElements, CGWindowListOption.OptionOnScreenOnly)
let windowListInfo = CGWindowListCopyWindowInfo(options, CGWindowID(0))
let infoList = windowListInfo as NSArray? as? [[String: AnyObject]]
#2
6
Use takeUnretainedValue() or takeRetainedValue() on windowList.
在窗口列表中使用takeUnretainedValue()或takeRetainedValue()。
Check out Apple's Using Swift with Cocoa and Objective-C and read the section called Working with Cocoa Data Types and look for Unmanaged Objects.
查看一下Apple在Cocoa和Objective-C中使用Swift，并阅读“使用Cocoa数据类型”一节，并查找非托管对象。
Here is a concrete example:
这里有一个具体的例子:
import Cocoa
let windowInfosRef = CGWindowListCopyWindowInfo(CGWindowListOption(kCGWindowListOptionOnScreenOnly), CGWindowID(0))
let windowInfos = windowInfosRef.takeRetainedValue().__conversion() // cast to swift dictionary
println(windowInfos) // print the swift dictionary
#3
1
Here's my version for Swift 1.2. It's more explicit about types, since we know the function returns an array of dictionaries with string keys.
这是我的版本。它对类型更明确，因为我们知道函数返回一个带有字符串键的字典数组。
let options = CGWindowListOption(kCGWindowListOptionOnScreenOnly)
let cfInfoList = CGWindowListCopyWindowInfo(options, CGWindowID(0)).takeRetainedValue()
let infoList = cfInfoList as NSArray as? [[String: AnyObject]]
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