iokit

I have a simple question. How do I get iPhone's battery level? [UIDevice currentDevice] batteryLevel] Simple enough? However there is a little catch - I can't use UIKit . Here is what I wrote so far, but I don't think it works: // notification port IONotificationPortRef nport = IONotificationPortCreate(kIOMasterPortDefault); CFRunLoopAddSource(CFRunLoopGetCurrent(), IONotificationPortGetRunLoopSource(nport), kCFRunLoopDefaultMode); CFMutableDictionaryRef matching = IOServiceMatching("IOPMPowerSource"); kern_return_t kr = IOServiceAddMatchingNotification(nport, kIOFirstMatchNotification,

So everything was fine, and then I decided to start developing on XCode 5 DP3 and iOS7 Prior to upgrading, my project compiled and ran fine on my iPhone 3GS (I made a little soft phone application); it didn't run on my iPhone 5, however; I was very confident that it was the fact that I hadn't configured it to include the armv7s architecture yet. I can build and run everything just fine on the simulators, but (and this is after configuring the app to include the armv7s architecture) I can't get it to run on either my devices. I get this error: ld: framework not found IOKit clang: error: linker

I'm trying to use IOHIDManager to get modifier key events because Cocoa flagsChanged events are lacking (difficult to differentiate between press/release, left/right if both are down, etc.) Here's the code where I create the manager and register the callback. IOHIDManagerRef hidManager = IOHIDManagerCreate(kCFAllocatorDefault, kIOHIDOptionsTypeNone); if (CFGetTypeID(hidManager) != IOHIDManagerGetTypeID()) return 1; CFMutableDictionaryRef capsLock = myCreateDeviceMatchingDictionary(0x07, 0x39); CFMutableDictionaryRef lctrl = myCreateDeviceMatchingDictionary(0x07, 0xE0); CFMutableDictionaryRef