如何为iOS手动设置设备的锁定时间

Question

我在iOS中知道，如果您将设备空闲45秒，则屏幕将变暗，如果闲置了15秒，则该设备将自动锁定。

，我们可以通过 [uiapplication sharedApplication] .idletimerDisabled = yes

但是，我确实想要此功能，只想更长的时间，我可以手动设置此计时器吗？

是否有任何方法（没有越狱）？

谢谢

Answer 1

您可以通过监视用户与应用程序（触摸事件）的互动（触摸事件）和设置[UIApplication sharedApplication].idleTimerDisabled = NO;时实现此目标。

您可以在此博客上了解有关监视事件的更多信息。但是，我已经概述了以下步骤，其中包含ARC的代码更新。

测试之后可能的背景。苹果的内部空闲计时器都可以运行，无论是否设置idleTimerDisabled = YES;。这意味着，如果用户未与手机相互作用，则在设置idleTimerDisabled = NO;时（即1分钟），设置设备时，设备将立即变暗，并在15秒后完全关闭。因此，我们可以做的是禁用idletimer，并手动创建一个新的计时器，该计时器等待x分钟，然后再启用脚踏仪。

这将有效地允许您增加自动锁定时间。我认为您无法减少它（即用户没有自动锁，您想在一分钟后锁定该设备）。

使用以下代码（假设您将自动锁定设置为1分钟），该应用程序将保持清醒2分钟，然后我们将idleTimerDisabled = NO;设置为15秒钟，然后将其关闭。

。

1. 将以下两个文件添加到您的项目（原始来源此处）：

   elcuiapplication.h

   //
   //  ELCUIApplication.h
   //
   //  Created by Brandon Trebitowski on 9/19/11.
   //  Copyright 2011 ELC Technologies. All rights reserved.
   //
   #import <Foundation/Foundation.h>
   // # of minutes before application times out
   #define kApplicationTimeoutInMinutes 2
   // Notification that gets sent when the timeout occurs
   #define kApplicationDidTimeoutNotification @"ApplicationDidTimeout"
   /**
    * This is a subclass of UIApplication with the sendEvent: method 
    * overridden in order to catch all touch events.
    */
   @interface ELCUIApplication : UIApplication {
       NSTimer *_idleTimer;
   }
   /**
    * Resets the idle timer to its initial state. This method gets called
    * every time there is a touch on the screen.  It should also be called
    * when the user correctly enters their pin to access the application.
    */
   - (void)resetIdleTimer;
   @end
   

   elcuiapplication.m

   //
   //  ELCUIApplication.m
   //
   //  Created by Brandon Trebitowski on 9/19/11.
   //  Copyright 2011 ELC Technologies. All rights reserved.
   //
   #import "ELCUIApplication.h"
   @implementation ELCUIApplication
   - (void)sendEvent:(UIEvent *)event {
       [super sendEvent:event];
       // Fire up the timer upon first event
       if(!_idleTimer) {
           [self resetIdleTimer];
       }
       // Check to see if there was a touch event
       NSSet *allTouches = [event allTouches];
       if ([allTouches count] > 0) {
           UITouchPhase phase = ((UITouch *)[allTouches anyObject]).phase;
           if (phase == UITouchPhaseBegan) {
               [self resetIdleTimer];         
           }
       }
   }
   - (void)resetIdleTimer {
       if (_idleTimer) {
           [_idleTimer invalidate];
   //        [_idleTimer release];
       }
       // Schedule a timer to fire in kApplicationTimeoutInMinutes * 60
       float timeout = kApplicationTimeoutInMinutes * 60;
       _idleTimer = [NSTimer scheduledTimerWithTimeInterval:timeout
                                                     target:self 
                                                   selector:@selector(idleTimerExceeded) 
                                                   userInfo:nil 
                                                    repeats:NO];
   }
   - (void)idleTimerExceeded {
       /* Post a notification so anyone who subscribes to it can be notified when
        * the application times out */ 
       [[NSNotificationCenter defaultCenter]
        postNotificationName:kApplicationDidTimeoutNotification object:nil];
   }
   //- (void) dealloc {
   //  [_idleTimer release];
   //  [super dealloc];
   //}
   @end
   

2. 在您的支持文件文件夹中打开 main.m ，更新以下内容：

   #import <UIKit/UIKit.h>
   #import "AppDelegate.h"
   int main(int argc, char *argv[])
   {
       @autoreleasepool {
           return UIApplicationMain(argc, argv,  @"ELCUIApplication", NSStringFromClass([AppDelegate class]));
       }
   }
   

3. in appdelegate.m 编辑didfinishlaunchingwithoptions：方法并添加applicationDidTimeOut：method。

   - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
   {
       // Override point for customization after application launch.
       [UIApplication sharedApplication].idleTimerDisabled = YES;
       [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(applicationDidTimeout:)
                                                name:kApplicationDidTimeoutNotification object:nil];
       return YES;
   }
   - (void) applicationDidTimeout:(NSNotification *) notif {
       NSLog(@"applicationDidTimeout");
       [UIApplication sharedApplication].idleTimerDisabled = NO;
   }