如何在mac OSX Swift上获得所有支持的屏幕分辨率

Question

我想要一个代码

1）抓住我当前的屏幕分辨率，（已解决）。

例如：获取当前屏幕显示代码为：

system_profiler SPDisplaysDataType | grep Resolution

2）抓取所有支持的分辨率，如下图所示（未解决）。

或任何Objective C代码也很有用

Answer 1

Swift代码

    var displayConfig: CGDisplayConfigRef = nil
    let mainDisplayID = CGMainDisplayID()

    var displayMode = CGDisplayCopyDisplayMode(mainDisplayID).takeRetainedValue()
    var width = CGDisplayModeGetWidth(displayMode)
    var height = CGDisplayModeGetHeight(displayMode)

    print("current size: \(width)x\(height)\n")
    print("available sizes:\n")

    var modes = CGDisplayCopyAllDisplayModes(mainDisplayID, nil).takeRetainedValue()
    let modesCount = CFArrayGetCount(modes) - 1

    for i in 0...modesCount {
        var mode: CGDisplayModeRef = unsafeBitCast(CFArrayGetValueAtIndex(modes, i), CGDisplayModeRef.self)

        var width = CGDisplayModeGetWidth(mode)
        var height = CGDisplayModeGetHeight(mode)
        print("\t\(width)x\(height)\n")

Answer 2

Xcode 8•Swift 3

struct Display {
    static var mode: CGDisplayMode? { return CGDisplayCopyDisplayMode(CGMainDisplayID()) }
    static var modes: [CGDisplayMode] {
        var result: [CGDisplayMode] = []
        let modes = CGDisplayCopyAllDisplayModes(CGMainDisplayID(), nil).unsafelyUnwrapped
        (0..<CFArrayGetCount(modes)).forEach({result.append(unsafeBitCast(CFArrayGetValueAtIndex(modes, $0), to: CGDisplayMode.self))})
        return result
    }
}

extension CGDisplayMode {
    var resolution: String { return String(width) + " x " + String(height) }
}

用法：

if let resolution = Display.mode?.resolution {
    print("Resolution:", resolution)
}
for mode in Display.modes {
    print(mode.resolution)
}