检测用户是否触摸了屏幕 [英] Detect if the user has touched the screen
本文介绍了检测用户是否触摸了屏幕的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
如何检测用户是否在过去5秒内触摸了屏幕。如果他们没有，我希望它调用我的方法来隐藏导航栏。我找到了一些答案，但无法弄明白。
How do I detect if the user has touched the screen in the past 5 seconds. If they have not I would like it to call my method to hide the navigation bars. I found a few answer but could not figure them out.
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
< img src =https://i.stack.imgur.com/MzI60.pngalt =在此处输入图像说明>
推荐答案
我已经采用了你的代码，以便它可以工作。
I've adopted your code so that it should work.
主要更改为： pagesTableViewController 和 collectionViewController 应该是
保留应用程序委托的属性。
Main changes are: pagesTableViewController and collectionViewController should be
retained properties of your application delegate.
self.window.rootViewController 现在在<$中定义c $ c> didFinishLaunchingWithOptions：，两个viewControllers都在 dealloc 中发布。
self.window.rootViewController is now defined in didFinishLaunchingWithOptions:, both viewControllers are released in dealloc.
请注意，您确实应该考虑将类定义放在单独的文件中，而
可能会开始为新项目使用ARC。
Note that you really should consider placing class definitions in separate files and possibly start using ARC for new projects.
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，因此可能存在一些拼写错误。好吧没有。
I made the changes in text editor so there might be some typos. Hopfully not.
编辑：
如果你想让某个viewController启动/停止计时器，它会出现/消失你应该删除appDelegate中的所有startTimer accourancies并将以下行放在viewControllers .m文件中：
If you want a certain viewController to start/stop timer with it's appearing/disappearing you should remove all startTimer accourancies in the appDelegate and put the following lines in that viewControllers .m file:
#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];
}
这篇关于检测用户是否触摸了屏幕的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
查看全文
