在Mac OS X应用程序中调整屏幕亮度
我想要控制Mac OS X应用程式中主萤幕的亮度(例如F1 / F2按钮)。在iOS中,有这样的:
I want to control the brightness of the main-screen within my Mac OS X app (like the F1/F2 buttons). In iOS, there's something like this:
UIScreen.mainScreen().brightness = CGFloat(0.5)
在OSX中,我们有NSScreen,这是很好找出什么是主屏幕,但它错过了 .brightness
方法。
In OSX we have NSScreen, which is nice to find out what the main-screen is, but it misses the .brightness
method.
那么如何在OSX上使用Swift调整显示器亮度?
So how can I adjust the monitor brightness using Swift on OSX?
在OS X上没有这样的API。
There's no such nice API for doing this on OS X.
我们必须使用 IOServiceGetMatchingServices
IODisplayConnect
(显示设备),然后使用 kIODisplayBrightnessKey
设置亮度:
We have to use IOServiceGetMatchingServices
to find "IODisplayConnect"
(the display device) then use the kIODisplayBrightnessKey
to set the brightness:
func setBrightnessLevel(level: Float) {
var iterator: io_iterator_t = 0
if IOServiceGetMatchingServices(kIOMasterPortDefault, IOServiceMatching("IODisplayConnect"), &iterator) == kIOReturnSuccess {
var service: io_object_t = 1
while service != 0 {
service = IOIteratorNext(iterator)
IODisplaySetFloatParameter(service, 0, kIODisplayBrightnessKey, level)
IOObjectRelease(service)
}
}
}
setBrightnessLevel(0.5)