XCode4.2-use complex touch and gesture UIXXGestureRecognizer

Using Complex touch and gesture Apple's Class with various gesture identifiers, the following uses several gesture identifiers for implementation: Click, sweep, hide, and rotate (shaking is not involved for the moment ). Each gesture has a pop-up window feedback. In ViewController. in the m file, 1-Click Event-(void) foundTap :( UITapGestureRecognizer *) recognizer {UIAlertView * alert = [[UIAlertView alloc] initWithTitle: @ "Hello" message: @ "tapped" delegate: nil cancelButtonTitle: @ "OK" otherButtonTitles: nil]; [alert show];}-(void) viewDidLoad {[super viewDidLoad]; optional * tapRecognizer; // create a tap gesture reader tapRecognizer = [[UITapGestureRecognizer alloc] initWithTarget: self action: @ selector (foundTap :)]; // initialize the reader and use the function pointer (method pointer) method for triggering the simultaneous implementation of tapRecognizer. numberOfTapsRequired = 1; // trigger this behavior by the number of objects (1. numberOfTouchesRequired = 1; // The hand index of the Request Response [self. view addGestureRecognizer: tapRecognizer]; // Add the Controller to the corresponding object} follow the steps below to observe the implementation method: create a controller instance -- initialize the instance -- add it to the class Object -- Implement the method (@ selector () in the function pointer ()). [If You Want To obtain the coordinates of a light or sweep gesture, you can add: CGPoint location = [recognizer locationInView: <the view> to be the view name of the gesture reader; location has two parameters x and y] 2-sweep: Next, follow the steps above to perform the sweep: function pointer pointing method:-(void) foundSwipe :( UISwipeGestureRecognizer *) recognizer {UIAlertView * alert = [[UIAlertView alloc] initWithTitle: @ "Hello" message: @ "swiped" delegate: nil cancelButtonTitle: @ "OK" otherButtonTitles: nil] [alert show];} Still viewDidLoad: Using * swipeRecognizer; // create a lightweight scanner swipeRecognizer = [[using alloc] initWithTarget: self action: @ selector (foundSwipe :)]; // The object is initialized and has a function pointer swipeRecognizer. direction = UISwipeGestureRecognizerDirectionRight | uiswipegesturerecognizerdireleft; // move swipeRecognizer to the left or right of the gesture. numberOfTouchesRequired = 1; // Number of scan objects [self. view addGestureRecognizer: swipeRecognizer]; // when adding a controller to an object, you can choose from four directions: uiswipegesturerecognizerdireright/Left/Up/Down. 3-Zhang he: the following method is used to zoom in and out the function pointer:-(void) foundPinch :( UIPinchGestureRecognizer *) recognizer {// note the class NSString * message; double scale; scale = recognizer. scale; // scale (scale, Scale) of the identification device // Use scale in combination with glScalef of openGLES to scale the message = [[NSString alloc] initWithFormat: @ "scale: Scale: % 1.2f, velocity: % 1.2f ", recognizer. scale, recognizer. velocity]; UIAlertView * alert = [[UIAlertView alloc] initWithTitle: @ "Hello" message: message delegate: nil cancelButtonTitle: @ "OK" otherButtonTitles: nil]; [alert show];} In ViewDidLoad: UIPinchGestureRecognizer * pinchReconizer; // create a new Zhang He reader object pinchReconizer = [[zhangalloc] initWithTarget: self action: @ selector (foundPinch)]; // initialize the object [self. view addGestureRecognizer: pinchReconizer]; // Add controller 4-rotate first the Cocoa class uses radians as the unit, and the conversion relationship between degrees and radians: angle = radian * 180/Pi function pointer pointing method:-(void) foundRotation :( UIRotationGestureRecognizer *) recognizer {NSString * message; double rotation; rotation = recognizer. rotation; // return a controller angle // In openGLES, you can use rotation with glRoatef to rotate message = [[NSString alloc] initWithFormat: @ "rotation, Radians: % 1.2f, Velocity: % 1.2f ", recognizer. rotation, recognizer. velocity]; UIAlertView * alert = [[UIAlertView alloc] initWithTitle: @ "Hello" message: message delegate: nil cancelButtonTitle: @ "OK" otherButtonTitles: nil]; [alert show];} viewDidLoad is as follows: Using * rotationRecognizer; // create a rotation gesture controller object rotationRecognizer = [[using alloc] initWithTarget: self action: @ selector (foundRotation :)]; // initialize the object [self. view addGestureRecognizer: rotationRecognizer]; // Add a controller