これを行うパブリック API はありませんが、 にフックして、画面IOKit
のIOHIDEventSystem
減光通知をリッスンできます。
// Create and open an event system.
IOHIDEventSystemRef system = IOHIDEventSystemCreate(NULL);
// Set the PrimaryUsagePage and PrimaryUsage that the AppleProxShim service uses
int page = 65280;
int usage = 8;
// Create a dictionary to match the service with
CFStringRef keys[2];
CFNumberRef nums[2];
keys[0] = CFStringCreateWithCString(0, "PrimaryUsagePage", 0);
keys[1] = CFStringCreateWithCString(0, "PrimaryUsage", 0);
nums[0] = CFNumberCreate(0, kCFNumberSInt32Type, &page);
nums[1] = CFNumberCreate(0, kCFNumberSInt32Type, &usage);
CFDictionaryRef dict = CFDictionaryCreate(0, (const void**)keys, (const void**)nums, 2, &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks);
// Get the total of matching services with the above criteria
CFArrayRef srvs = (CFArrayRef)IOHIDEventSystemCopyMatchingServices(system, dict, 0, 0, 0, 0);
// Get the service
IOHIDServiceRef serv = (IOHIDServiceRef)CFArrayGetValueAtIndex(srvs, 0);
int interval = 1 ;
// Set an interval of 1 , to activate the sensor
IOHIDServiceSetProperty((IOHIDServiceRef)serv, CFSTR("ReportInterval"), CFNumberCreate(0, kCFNumberSInt32Type, &interval));
// add your event handler
IOHIDEventSystemOpen(system, handle_event, NULL, NULL, NULL);
int defaultInterval = 0;
IOHIDServiceSetProperty((IOHIDServiceRef)serv, CFSTR("ReportInterval"), CFNumberCreate(0, kCFNumberSInt32Type, &defaultInterval));
// close handles and release the IOHIDEventSystemRef
IOHIDEventSystemClose(system, NULL);
CFRelease(system);
イベント ハンドラー関数ポインターは次のようになります。
void handle_event(void* target, void* refcon, IOHIDServiceRef service, IOHIDEventRef event) {
if (IOHIDEventGetType(event) == kIOHIDEventTypeProximity) { // Proximity Event Received
// not necessary, but if you want the value from the sensor, get it from IOHIDEventGetIntegerValue
int proximityValue = IOHIDEventGetIntegerValue(event, (IOHIDEventField)kIOHIDEventFieldProximityDetectionMask); // Get the value of the ProximityChanged Field (0 or 64)
// Call dimScreen with the boolean NO
int (*SBSSpringBoardServerPort)() = (int (*)())dlsym(RTLD_DEFAULT, "SBSSpringBoardServerPort");
int port = SBSSpringBoardServerPort();
void (*_SBDimScreen)(int _port,BOOL shouldDim) = (void (*)(int _port,BOOL shouldDim))dlsym(RTLD_DEFAULT, "SBDimScreen");
// This is where the logic to dim the screen based on the sensor value would go. In this case, I'm hardcoding NO instead of the value of proximityValue from above
// BOOL dim = proximityValue == 0 ? NO : YES;
_SBDimScreen(port, NO);
}
}
空の関数ポインターがあると、すべての近接センサー イベントが停止する可能性があるため、呼び出す_SBDimScreen
必要さえない場合があります。
iPhoneDevWiki のAppleProxShimページにあるコマンド ライン ツールの例から変更されたコード。