检测用户是否触摸过屏幕

如何检测用户是否在过去的5秒钟内触摸过屏幕。 如果他们没有，我想调用我的方法来隐藏导航栏。 我find了一些答案，但无法弄清楚。

谢谢

.hhhh

#import <UIKit/UIKit.h> #import "PageView.h" #import "SlideShowViewController.h" #import "PagesCollectionViewController.h" @interface PageFlipperAppDelegate : NSObject <UIApplicationDelegate> {} @property (nonatomic, retain) IBOutlet UIWindow *window; @property (nonatomic, retain, readonly) NSManagedObjectContext *managedObjectContext; @property (nonatomic, retain, readonly) NSManagedObjectModel *managedObjectModel; @property (nonatomic, retain, readonly) NSPersistentStoreCoordinator *persistentStoreCoordinator; - (void)saveContext; - (NSURL *)applicationDocumentsDirectory; @end @protocol MyKindOfWindowDelegate; @interface MyKindOfWindow : UIWindow { NSTimer *tenthTimer; NSInteger tenthPast; } @property (nonatomic, assign) id <MyKindOfWindowDelegate> touchDelegate; -(void)startTimer; -(void)stopTimer; -(void)timerTick; @end @protocol MyKindOfWindowDelegate <NSObject> @required - (void) noTouchForFiveSeconds; @end 

.mmmm

  #import "PageFlipperAppDelegate.h" @implementation PageFlipperAppDelegate @synthesize window; @synthesize managedObjectContext, managedObjectModel, persistentStoreCoordinator; - (void) noTouchForFiveSeconds //!! your AppDelegate should implement this method { NSLog (@"No touch detected for over 5 seconds"); //do your stuff //you can re-start timer immediately or somewhere later in the code [(MyKindOfWindow *)self.window startTimer]; } - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { [[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleBlackOpaque]; [NSThread sleepForTimeInterval:2.75]; self.window = [[MyKindOfWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]]; [(MyKindOfWindow *)self.window setTouchDelegate:self]; //PagesTableViewController *pagesTableViewController = [[PagesTableViewController alloc] initWithManagedObjectContext:[self managedObjectContext]]; //[(UINavigationController *)[[self window] rootViewController] pushViewController:pagesTableViewController animated:NO]; PagesCollectionViewController *collectionViewController = [[PagesCollectionViewController alloc] initWithManagedObjectContext:[self managedObjectContext]]; //self.window = (UIWindow*)[[SlideShowViewController alloc] initWithFrame:[[UIScreen mainScreen] bounds]]; // [s setTouchDelegate:self]; [(UINavigationController *)[[self window] rootViewController] pushViewController:collectionViewController animated:NO]; [(UINavigationController *)[[self window] rootViewController] setToolbarHidden:NO animated:NO]; //[[UIApplication sharedApplication] setStatusBarHidden:YES withAnimation:UIStatusBarAnimationFade]; //[pagesTableViewController release]; [collectionViewController release]; [[self window] makeKeyAndVisible]; return YES; } - (void)applicationWillResignActive:(UIApplication *)application { //stopping timer since we're going to background [(MyKindOfWindow *)self.window stopTimer]; } - (void)applicationDidBecomeActive:(UIApplication *)application { //you can start timer when app became active or somewhere later in the code [(MyKindOfWindow *)self.window startTimer]; } - (void)applicationDidEnterBackground:(UIApplication *)application { [self saveContext]; } - (void)applicationWillEnterForeground:(UIApplication *)application { /* Called as part of the transition from the background to the inactive state; here you can undo many of the changes made on entering the background. */ } - (void)applicationWillTerminate:(UIApplication *)application { [self saveContext]; } - (void)dealloc { [window release]; [managedObjectContext release]; [managedObjectModel release]; [persistentStoreCoordinator release]; [super dealloc]; } - (void)awakeFromNib { /* Typically you should set up the Core Data stack here, usually by passing the managed object context to the first view controller. self..managedObjectContext = self.managedObjectContext; */ } - (void)saveContext { NSError *error = nil; if ([self managedObjectContext]) { if ([managedObjectContext hasChanges] && ![managedObjectContext save:&error]) { /* Replace this implementation with code to handle the error appropriately. abort() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development. If it is not possible to recover from the error, display an alert panel that instructs the user to quit the application by pressing the Home button. */ // NSLog(@"Unresolved error %@, %@", error, [error userInfo]); abort(); } } } #pragma mark - Core Data stack /** Returns the managed object context for the application. If the context doesn't already exist, it is created and bound to the persistent store coordinator for the application. */ - (NSManagedObjectContext *)managedObjectContext { if (!managedObjectContext) { NSPersistentStoreCoordinator *coordinator = [self persistentStoreCoordinator]; if (coordinator) { managedObjectContext = [[NSManagedObjectContext alloc] init]; [managedObjectContext setPersistentStoreCoordinator:coordinator]; [managedObjectContext setUndoManager:[[[NSUndoManager alloc] init] autorelease]]; } } return managedObjectContext; } /** Returns the managed object model for the application. If the model doesn't already exist, it is created from the application's model. */ - (NSManagedObjectModel *)managedObjectModel { if (!managedObjectModel) { NSURL *modelURL = [[NSBundle mainBundle] URLForResource:@"PageFlipper" withExtension:@"momd"]; managedObjectModel = [[NSManagedObjectModel alloc] initWithContentsOfURL:modelURL]; } return managedObjectModel; } /** Returns the persistent store coordinator for the application. If the coordinator doesn't already exist, it is created and the application's store added to it. */ - (NSPersistentStoreCoordinator *)persistentStoreCoordinator { if (persistentStoreCoordinator) return persistentStoreCoordinator; NSURL *storeURL = [[self applicationDocumentsDirectory] URLByAppendingPathComponent:@"PageFlipper.sqlite"]; NSError *error = nil; persistentStoreCoordinator = [[NSPersistentStoreCoordinator alloc] initWithManagedObjectModel:[self managedObjectModel]]; if (![persistentStoreCoordinator addPersistentStoreWithType:NSSQLiteStoreType configuration:nil URL:storeURL options:nil error:&error]) { /* Replace this implementation with code to handle the error appropriately. abort() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development. If it is not possible to recover from the error, display an alert panel that instructs the user to quit the application by pressing the Home button. Typical reasons for an error here include: * The persistent store is not accessible; * The schema for the persistent store is incompatible with current managed object model. Check the error message to determine what the actual problem was. If the persistent store is not accessible, there is typically something wrong with the file path. Often, a file URL is pointing into the application's resources directory instead of a writeable directory. If you encounter schema incompatibility errors during development, you can reduce their frequency by: * Simply deleting the existing store: [[NSFileManager defaultManager] removeItemAtURL:storeURL error:nil] * Performing automatic lightweight migration by passing the following dictionary as the options parameter: [NSDictionary dictionaryWithObjectsAndKeys:[NSNumber numberWithBool:YES], NSMigratePersistentStoresAutomaticallyOption, [NSNumber numberWithBool:YES], NSInferMappingModelAutomaticallyOption, nil]; Lightweight migration will only work for a limited set of schema changes; consult "Core Data Model Versioning and Data Migration Programming Guide" for details. */ // NSLog(@"Unresolved error %@, %@", error, [error userInfo]); abort(); } return persistentStoreCoordinator; } #pragma mark - Application's Documents directory /** Returns the URL to the application's Documents directory. */ - (NSURL *)applicationDocumentsDirectory { return [[[NSFileManager defaultManager] URLsForDirectory:NSDocumentDirectory inDomains:NSUserDomainMask] lastObject]; } /*- (IBAction)toggleSettingsView:(id)sender { UIView *from = ([[settingsViewController view] isHidden] ? [padViewController view] : [settingsViewController view]); UIView *to = ([[settingsViewController view] isHidden] ? [settingsViewController view] : [padViewController view]); const NSTimeInterval flipDuration = 1.0; [UIView transitionWithView:from duration:flipDuration options:UIViewAnimationOptionTransitionFlipFromLeft animations:^(void) { [from setHidden:YES]; [to setHidden:NO]; } completion:^(BOOL finished) {} ]; [UIView transitionWithView:to duration:flipDuration options:UIViewAnimationOptionTransitionFlipFromLeft animations:^(void) { [from setHidden:YES]; [to setHidden:NO]; } completion:^(BOOL finished) {} ]; }*/ @end @implementation MyKindOfWindow @synthesize touchDelegate = _touchDelegate; - (id)initWithFrame:(CGRect)aRect { if ((self = [super initWithFrame:aRect])) { _touchDelegate = nil; tenthPast = 0; tenthTimer = nil; } return self; } -(void)startTimer { NSLog (@"starting timer"); tenthPast = 0; if (tenthTimer) [self stopTimer]; tenthTimer = [NSTimer timerWithTimeInterval:0.1 target:self selector:@selector(timerTick) userInfo:nil repeats:YES]; [[NSRunLoop currentRunLoop] addTimer:tenthTimer forMode:NSDefaultRunLoopMode]; } -(void)stopTimer { NSLog (@"stopping timer"); [tenthTimer invalidate]; tenthTimer = nil; } -(void)timerTick { //NSLog (@"1/10th of second passed"); if (++tenthPast > 50) { if ((_touchDelegate != nil) && ([_touchDelegate respondsToSelector:@selector(noTouchForFiveSeconds)])) { NSLog (@"sending info to delegate"); [self stopTimer]; [_touchDelegate noTouchForFiveSeconds]; } } } - (void)sendEvent:(UIEvent *)event { [super sendEvent: event]; if (event.type == UIEventTypeTouches) { //NSLog (@"touches detected - resetting counter"); tenthPast = 0; } } @end 

Answer 1

我已经采用了你的代码，所以它应该工作。

主要的变化是： pagesTableViewController和collectionViewController应该保留你的应用程序委托的属性。

self.window.rootViewController现在在didFinishLaunchingWithOptions:定义didFinishLaunchingWithOptions:两个viewController都在dealloc中释放。

请注意，您确实应该考虑将类定义放在单独的文件中，并可能在新项目中使用ARC。

PageFlipperAppDelegate.h

  #import <UIKit/UIKit.h>  #import "PageView.h"  #import "SlideShowViewController.h"  #import "PagesCollectionViewController.h" @protocol MyKindOfWindowDelegate;  @interface PageFlipperAppDelegate : NSObject <UIApplicationDelegate,MyKindOfWindowDelegate> {}  @property (nonatomic, retain) IBOutlet UIWindow *window; @property (nonatomic, retain) PagesTableViewController* pagesTableViewController; @property (nonatomic, retain) SlideShowViewController* collectionViewController;  @property (nonatomic, retain, readonly) NSManagedObjectContext *managedObjectContext;  @property (nonatomic, retain, readonly) NSManagedObjectModel *managedObjectModel;  @property (nonatomic, retain, readonly) NSPersistentStoreCoordinator *persistentStoreCoordinator;  - (void)saveContext;  - (NSURL *)applicationDocumentsDirectory;  @end  @interface MyKindOfWindow : UIWindow  {    NSTimer *tenthTimer;    NSInteger tenthPast;  }  @property (nonatomic, retain) id <MyKindOfWindowDelegate> touchDelegate;  -(void)startTimer;  -(void)stopTimer;  -(void)timerTick;  @end  @protocol MyKindOfWindowDelegate <NSObject>  @required  - (void) noTouchForFiveSeconds;  @end 

PageFlipperAppDelegate.m

  #import "PageFlipperAppDelegate.h"  @implementation PageFlipperAppDelegate  @synthesize window,pagesTableViewController,collectionViewController;  @synthesize managedObjectContext, managedObjectModel, persistentStoreCoordinator;  - (void) noTouchForFiveSeconds  //!! your AppDelegate should implement this method  {    NSLog (@"No touch detected for over 5 seconds");    //do your stuff    //you can re-start timer immediately or somewhere later in the code    [(MyKindOfWindow *)self.window startTimer];  }  - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions  {    [[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleBlackOpaque];    [NSThread sleepForTimeInterval:2.75];    self.window = [[MyKindOfWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];   [(MyKindOfWindow *)self.window setTouchDelegate:self];    self.pagesTableViewController = [[PagesTableViewController alloc] initWithManagedObjectContext:[self managedObjectContext]]; self.collectionViewController = [[PagesCollectionViewController alloc] initWithManagedObjectContext:[self managedObjectContext]];   self.window.rootViewController = self.pagesTableViewController; [self.pagesTableViewController pushViewController:pagesTableViewController animated:NO];       [self.pagesTableViewController setToolbarHidden:NO animated:NO];    [[self window] makeKeyAndVisible];    return YES;  }  - (void)dealloc  { [pagesTableViewController release]; [collectionViewController release];    [window release];    [managedObjectContext release];    [managedObjectModel release];    [persistentStoreCoordinator release];    [super dealloc];  } 

我在文本编辑器中进行了更改，所以可能会有一些错别字。 没有跳跃

编辑：

如果你想要一个特定的viewController启动/停止计时器出现/消失，你应该删除appDelegate中的所有startTimer accourancies，并将下面的行放在该viewControllers .m文件中：

 #import "PageFlipperAppDelegate.h" - (void)viewDidAppear:(BOOL)animated { [super viewDidAppear: animated]; PageFlipperAppDelegate *appDelegate = (PageFlipperAppDelegate *)[[UIApplication sharedApplication] delegate]; [(MyKindOfWindow *)appDelegate.window startTimer]; } - (void)viewDidDisappear:(BOOL)animated { [super viewDidDisappear: animated]; PageFlipperAppDelegate *appDelegate = (PageFlipperAppDelegate *)[[UIApplication sharedApplication] delegate]; [(MyKindOfWindow *)appDelegate.window stopTimer]; } 

Answer 2

创build一个设置为在5秒内触发的定时器。 每次用户与UI交互都会使计时器失效并重置计时器。 如果计时器触发，那么你知道用户在最近5秒内没有进行交互。

Answer 3

作为jaminguy的答案的补充，你可能会将UIWindow覆盖- (void)sendEvent:(UIEvent *)event为：

 - (void)sendEvent:(UIEvent *)event { [super sendEvent: event]; if (event.type == UIEventTypeTouches) { //here you can invalidate & restart your 5s timer } } 

然后，您应该使用这个子类作为应用程序的主窗口（在appDelegate中设置为键的窗口）。

一些文献：

UIWindow类参考

UIEvent类参考

为了实现这一点，你必须添加另一个类到你的项目（MyKindOfWindow）。

文件MyKindOfWindow.h

 #import <UIKit/UIKit.h> @interface MyKindOfWindow : UIWindow @end 

文件MyKindOfWindow.m

 #import "MyKindOfWindow.h" @implementation MyKindOfWindow - (void)sendEvent:(UIEvent *)event { [super sendEvent: event]; if (event.type == UIEventTypeTouches) { NSLog (@"touch detected"); //here you can invalidate & restart your 5s timer } } @end 

你也将不得不修改你的AppDelegate.m 。 在开始添加

 #import "MyKindOfWindow.h" 

在 – (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions你replace行

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

与线

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

现在你已经走了一半了。 在您的debugging控制台中，每当您触摸屏幕时，您都应该看到“触摸已检测到”。 你必须决定将你的计时器（jaminguy的答案）放在哪里：MyKindOfWindow，AppDelegate，单独的类…