1、子类化窗口
如果响应链中没有motionEnded:withEvent:消息的接收者，那么该消息就会被发送给应用程序的window对象。所以需要在window对象上拦截motionEnded:withEvent:，并实现自己的通知模式。
#import <UIKit/UIKit.h> @interface MainWindow : UIWindow @end
#import "MainWindow.h" @implementation MainWindow - (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
// Initialization code
}
return self;
} - (void)motionEnded:(UIEventSubtype)motion withEvent:(UIEvent *)event
{
if (event.type == UIEventTypeMotion && event.subtype == UIEventSubtypeMotionShake)
{
[[NSNotificationCenter defaultCenter] postNotificationName:@"NOTIFICATION_SHAKE" object:self];
}
}
#import "AppDelegate.h"
#import "MainWindow.h"
#import "ViewController.h" @implementation AppDelegate @synthesize window = _window;
@synthesize viewController = _viewController; - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[MainWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
// Override point for customization after application launch.
self.viewController = [[ViewController alloc] initWithNibName:@"ViewController" bundle:nil];
self.window.rootViewController = self.viewController;
[self.window makeKeyAndVisible];
return YES;
}
2、实现摇晃通知
- (void) viewWillAppear: (BOOL)animated
{
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(shakeDetected:) name:@"NOTIFICATION_SHAKE" object:nil];
[super viewWillAppear:animated];
} - (void) viewWillDisappear: (BOOL)animated
{
[[NSNotificationCenter defaultCenter] removeObserver:self];
[super viewWillDisappear:animated];
} -(void)shakeDetected:(NSNotification *)paramNotification
{
NSLog(@"Shaken not stirred!");
}