Question

我在我的应用程序中使用了GPS位置更新。我想检测iOS设备是否处于睡眠模式，这样我就可以关闭GPS位置更新并优化电池使用。我已经在iOS 6中尝试了pausesLocationupdates，但它无法正常工作。我想在设备进入睡眠模式后立即关闭GPS位置更新。我想检测设备中的锁定/解锁事件。

有没有办法实现这个功能？

到目前为止，我收到了下面给出的达尔文通知

-(void)registerForall
{
    //Screen lock notifications
    CFNotificationCenterAddObserver(CFNotificationCenterGetDarwinNotifyCenter(), //center
                                    NULL, // observer
                                    displayStatusChanged, // callback
                                    CFSTR("com.apple.iokit.hid.displayStatus"), // event name
                                    NULL, // object
                                    CFNotificationSuspensionBehaviorDeliverImmediately);


    CFNotificationCenterAddObserver(CFNotificationCenterGetDarwinNotifyCenter(), //center
                                    NULL, // observer
                                    displayStatusChanged, // callback
                                    CFSTR("com.apple.springboard.lockstate"), // event name
                                    NULL, // object
                                    CFNotificationSuspensionBehaviorDeliverImmediately);

    CFNotificationCenterAddObserver(CFNotificationCenterGetDarwinNotifyCenter(), //center
                                    NULL, // observer
                                    displayStatusChanged, // callback
                                    CFSTR("com.apple.springboard.hasBlankedScreen"), // event name
                                    NULL, // object
                                    CFNotificationSuspensionBehaviorDeliverImmediately);

    CFNotificationCenterAddObserver(CFNotificationCenterGetDarwinNotifyCenter(), //center
                                    NULL, // observer
                                    displayStatusChanged, // callback
                                    CFSTR("com.apple.springboard.lockcomplete"), // event name
                                    NULL, // object
                                    CFNotificationSuspensionBehaviorDeliverImmediately);

}
//call back
static void displayStatusChanged(CFNotificationCenterRef center, void *observer, CFStringRef name, const void *object, CFDictionaryRef userInfo)
{
    NSLog(@"IN Display status changed");
    NSLog(@"Darwin notification NAME = %@",name);


}

当设备被锁定/解锁时，我能够获得达尔文通知，但真正的问题是如何识别通知是来自锁定还是解锁设备。控制台日志是：

 LockDetectDemo[2086] <Warning>: IN Display status changed
 LockDetectDemo[2086] <Warning>: Darwin notification NAME = com.apple.springboard.lockcomplete
 LockDetectDemo[2086] <Warning>: IN Display status changed
 LockDetectDemo[2086] <Warning>: Darwin notification NAME = com.apple.springboard.lockstate
 LockDetectDemo[2086] <Warning>: IN Display status changed
 LockDetectDemo[2086] <Warning>: Darwin notification NAME = com.apple.springboard.hasBlankedScreen
 LockDetectDemo[2086] <Warning>: IN Display status changed
 LockDetectDemo[2086] <Warning>: Darwin notification NAME = com.apple.iokit.hid.displayStatus

任何私有API也足够了。提前谢谢。

Answer 1

我解决了这个问题：

//call back
static void displayStatusChanged(CFNotificationCenterRef center, void *observer, CFStringRef name, const void *object, CFDictionaryRef userInfo)
{
    // the "com.apple.springboard.lockcomplete" notification will always come after the "com.apple.springboard.lockstate" notification
    CFStringRef nameCFString = (CFStringRef)name;
    NSString *lockState = (NSString*)nameCFString;
    NSLog(@"Darwin notification NAME = %@",name);

    if([lockState isEqualToString:@"com.apple.springboard.lockcomplete"])
    {
        NSLog(@"DEVICE LOCKED");
        //Logic to disable the GPS
    }
    else
    {
        NSLog(@"LOCK STATUS CHANGED");
        //Logic to enable the GPS
    }
}

-(void)registerforDeviceLockNotif
{
    //Screen lock notifications
    CFNotificationCenterAddObserver(CFNotificationCenterGetDarwinNotifyCenter(), //center
                                    NULL, // observer
                                    displayStatusChanged, // callback
                                    CFSTR("com.apple.springboard.lockcomplete"), // event name
                                    NULL, // object
                                    CFNotificationSuspensionBehaviorDeliverImmediately);

    CFNotificationCenterAddObserver(CFNotificationCenterGetDarwinNotifyCenter(), //center
                                    NULL, // observer
                                    displayStatusChanged, // callback
                                    CFSTR("com.apple.springboard.lockstate"), // event name
                                    NULL, // object
                                    CFNotificationSuspensionBehaviorDeliverImmediately);
}

注意：“com.apple.springboard.lockcomplete”通知将始终位于“com.apple.springboard.lockstate”通知之后

更新

从iOS的最新版本开始，无法再依赖两个通知的顺序

Answer 2

现在不允许应用听设备锁定通知！。

我收到了这个：

亲爱的开发人员，

我们发现您最近提交的“xxxx”存在一个或多个问题。要处理您的提交，必须纠正以下问题：

不支持的操作 - 不允许应用程序收听设备锁定通知。

一旦纠正了这些问题，请使用Xcode或Application Loader将新二进制文件上传到iTunes Connect。在iTunes Connect上的“我的应用程序”中的应用程序“详细信息”页面上选择新的二进制文件，然后单击“提交以供审阅”。

此致

App Store团队
  2017年4月26日10:56

Answer 3

/ *注册用于检测锁定状态的应用程序* /

 -(void)registerAppforDetectLockState {

     int notify_token;
     notify_register_dispatch("com.apple.springboard.lockstate",     &notify_token,dispatch_get_main_queue(), ^(int token) {
     uint64_t state = UINT64_MAX;
     notify_get_state(token, &state);
     if(state == 0) {
        NSLog(@"unlock device");
     } else {
        NSLog(@"lock device");
     }

     NSLog(@"com.apple.springboard.lockstate = %llu", state);
     UILocalNotification *notification = [[UILocalNotification alloc]init];
     notification.repeatInterval = NSDayCalendarUnit;
     [notification setAlertBody:@"Hello world!! I come becoz you lock/unlock your device :)"];
     notification.alertAction = @"View";
     notification.alertAction = @"Yes";
     [notification setFireDate:[NSDate dateWithTimeIntervalSinceNow:1]];
     notification.soundName = UILocalNotificationDefaultSoundName;
     [notification setTimeZone:[NSTimeZone  defaultTimeZone]];

     [[UIApplication sharedApplication] presentLocalNotificationNow:notification];

  });

 }

Answer 4

这是一个更好的解决方案

#import <notify.h>

#define kNotificationNameDidChangeDisplayStatus                 @"com.apple.iokit.hid.displayStatus"

@interface YourClass ()
{    
    int _notifyTokenForDidChangeDisplayStatus;
}

@property (nonatomic, assign, getter = isDisplayOn) BOOL displayOn;
@property (nonatomic, assign, getter = isRegisteredForDarwinNotifications) BOOL registeredForDarwinNotifications;

@end

- (void)registerForSomeNotifications
{
    //
    // Display notifications
    //

    __weak YourClass *weakSelf = self;

    uint32_t result = notify_register_dispatch(kNotificationNameDidChangeDisplayStatus.UTF8String,
                                               &_notifyTokenForDidChangeDisplayStatus,
                                               dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_BACKGROUND, 0l),
                                               ^(int info) {
                                                   __strong YourClass *strongSelf = weakSelf;

                                                   if (strongSelf)
                                                   {
                                                       uint64_t state;
                                                       notify_get_state(_notifyTokenForDidChangeDisplayStatus, &state);

                                                       strongSelf.displayOn = (BOOL)state;
                                                   }
                                               });
    if (result != NOTIFY_STATUS_OK)
    {
        self.registeredForDarwinNotifications = NO;
        return;
    }

    self.registeredForDarwinNotifications = YES;
}

- (void)unregisterFromSomeNotifications
{
    //
    // Display notifications
    //

    uint32_t result = notify_cancel(_notifyTokenForDidChangeDisplayStatus);
    if (result == NOTIFY_STATUS_OK)
    {
        self.registeredForDarwinNotifications = NO;
    }
}

Answer 5

对于您的特定用例，检查屏幕亮度可能很有用。

var isScreenLocked: Bool {
    return UIScreen.main.brightness == 0.0
}

Answer 6

我有一个解决方案，用于检查锁定按钮是否被按下或将应用置于后台模式。

锁定按键的应用周期并将应用置于后台模式-

锁定时

applicationWillResignActive

applicationDidEnterBackground

解锁时

applicationWillEnterForeground

applicationDidBecomeActive

////////////////////// 何时插入背景

applicationWillResignActive

applicationDidEnterBackground

何时放弃

applicationWillEnterForeground

applicationDidBecomeActive

在两种情况下，您都可以观察到相同的方法正在调用。在这种情况下，要按下锁定按钮或将应用置于后台，这是一项艰巨的任务。按下锁定按钮

applicationWillResignActive

applicationDidEnterBackground

这些方法将立即调用，但是当我们将应用程序置于后台时，这两种方法之间的时间间隔为毫秒。我们可以得到时差并为其设置条件。喜欢......

var dateResignActive : Date?
var dateAppDidBack : Date?
func applicationWillResignActive(_ application: UIApplication) {

    dateResignActive = Date()

}
func applicationDidEnterBackground(_ application: UIApplication) {

    dateAppDidBack = Date()

}
func applicationDidBecomeActive(_ application: UIApplication) {

    let el1 = getCurrentMillis(date: dateResignActive!)
    let el2 = getCurrentMillis(date: dateAppDidBack!)
    let diff = el2 - el1

    if diff < 10 { //// device was locked // 10 is aprox
        // device was locked

    }
    else {
        let elapsed = Int(Date().timeIntervalSince(date!))
        if elapsed > 15 { // put app in background
        }
    }

}
func getCurrentMillis(date : Date)->Int64 {
    return Int64(date.timeIntervalSince1970 * 1000)
}

**This code is tested in iPhone X(Notch) and iPhone 6(Home button device). Because notch device and home button device have small difference in above two method calling.**

Answer 7

吉米提供了一个很好的解决方案，但作为观察者传递(__bridge const void *)(self)更安全。

CFNotificationCenterAddObserver(CFNotificationCenterGetDarwinNotifyCenter(),
                                (__bridge const void *)(self),
                                displayStatusChanged,
                                CFSTR("com.apple.springboard.lockcomplete"),
                                NULL,
                                CFNotificationSuspensionBehaviorDeliverImmediately);

这允许您正确删除观察者。

Answer 8

在使用内容保护的设备上，受保护的文件以加密形式存储，并且仅在特定时间（通常是在设备解锁时）才可用。此通知可让您的应用知道该设备即将被锁定，并且该设备当前正在访问的所有受保护文件可能很快将不可用。

您可以订阅applicationProtectedDataWillBecomeUnavailable的通知，这很可能是在用户刚刚锁定iPhone时触发的。

我从来没有自己做过，但这只是一个替代解决方案...

有没有办法检查iOS设备是否被锁定/解锁？

8 个答案:

更新