我在我的应用程序使用的GPS位置更新。 我想检测是否iOS设备处于休眠模式，这样我可以关掉GPS位置更新和优化电池的使用。 我已经尝试pausesLocationupdates在iOS 6中，但可根据需要它不工作。 我想作为设备进入睡眠模式，以尽快关闭GPS位置更新。 我想检测设备的锁定/解锁事件。
有什么办法来实现这个功能？
到目前为止，我得到了达尔文通知如下给出
-(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);
}
我能当设备被锁定/解锁获得达尔文通知，但真正的问题是，如果通知有来自锁定或设备的解锁之间如何识别。 控制台日志：
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也就够了。 提前致谢。
Answer 1:
我解决了它是这样的：
//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：“ com.apple.springboard.lockcomplete ”通知会经常来的“com.apple.springboard.lockstate”通知后，
更新
这两个通知的顺序可以不再依靠为最新版本的iOS中，
Answer 2:
应用程序不允许现在听设备锁定的通知！
我曾收到此：
尊敬的开发，
我们已经发现了一个或多个问题与您最近提交的“XXXX”。 为了处理您提交，以下问题必须予以纠正：
不支持的操作 - 应用不准听设备锁通知。
一旦这些问题已得到纠正，在Xcode或应用程序加载器来上传新的二进制到iTunes连接。 选择在我的iTunes Connect中的Apps应用程序的详细信息页面上的新的二进制文件，并点击提交以供审核。
问候，
在App Store团队
2017年4月26日10:56
Answer 3:
/ *注册的应用程序，用于检测锁定状态* /
-(void)registerAppforDetectLockState {
int notify_token;
notify_register_dispatch("com.apple.springboard.lockstate", ¬ify_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:
这里有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:
为了您的具体使用情况检查屏幕的亮度可能是有用的。
var isScreenLocked: Bool {
return UIScreen.main.brightness == 0.0
}
Answer 6:
我得到了检查锁定按钮一个解决方案是按或将应用程序在后台模式。
应用循环锁按下，并把应用程序在后台模式 -
WHEN锁定按
applicationWillResignActive
applicationDidEnterBackground
WHEN UNLOCK PRESS
applicationWillEnterForeground
applicationDidBecomeActive
///////////////////// WHEN放入背景
applicationWillResignActive
applicationDidEnterBackground
WHEN FORGROUND
applicationWillEnterForeground
applicationDidBecomeActive
你可以在这两种情况下同样的方法在呼唤观察。 在这种情况下，这是困难的任务中获得按下锁定按钮或者把应用程序在后台。 一个小黑客是有当我们按下锁定按钮
applicationWillResignActive
applicationDidEnterBackground
这些方法会立即调用，但是当我们在后台把应用程序有两种方法之间毫秒的时间间隔。 我们可以得到的时间差，把条件就可以了。 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，但它的安全传递(__bridge const void *)(self)作为观察员。
CFNotificationCenterAddObserver(CFNotificationCenterGetDarwinNotifyCenter(),
(__bridge const void *)(self),
displayStatusChanged,
CFSTR("com.apple.springboard.lockcomplete"),
NULL,
CFNotificationSuspensionBehaviorDeliverImmediately);
这使您可以正确删除观察者。
文章来源: Is there a way to check if the iOS device is locked/unlocked?
