iOS 调节屏幕明暗度

1 #import "AppDelegate.h"

2

3 @interface AppDelegate ()

4

5 @end

6

7 @implementation AppDelegate

8

9

10 - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

11 self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];

12 // Override point for customization after application launch.

13 self.window.backgroundColor = [UIColor whiteColor];

14

15 UIDevice *device = [UIDevice currentDevice];

16 device.proximityMonitoringEnabled = YES;

17 if (device.proximityMonitoringEnabled == YES) {

18 [[NSNotificationCenter defaultCenter] addObserver:self

19 selector:@selector(proximityChanged:)

20 name:@"UIDeviceProximityStateDidChangeNotification" object:device];

21 }

22

23 [self.window makeKeyAndVisible];

24 return YES;

25 }

26

27 - (void)tuneBrightness:(NSTimer *)timer

28 {

29 if ([UIScreen mainScreen].brightness < 1) {

30 [UIScreen mainScreen].brightness += 0.05;

31 }else{

32 [timer invalidate];

33 }

34 }

35

36 - (void)proximityChanged:(NSNotification *)notification

37 {

38 UIDevice *device = [notification object];

39 if (!device.proximityState) {

40 [NSTimer scheduledTimerWithTimeInterval:0.3 target:self selector:@selector(tuneBrightness:) userInfo:nil repeats:YES];

41 }

42 }

43

44

45 - (void)applicationWillTerminate:(UIApplication *)application {

46 // 删除Observer

47 [[NSNotificationCenter defaultCenter] removeObserver:self];

48

49 }

50

51 @end