Six ways to use gestures

-(Void) viewdidload {[Super viewdidload]; // do any additional setup after loading the view. uiimageview * imageview = [[uiimageview alloc] initwithframe: cgrectmake (20, 30,280,430)]; imageview. image = [uiimage imagenamed: @ "2.jpg"]; // enable user interaction. Remember to enable interaction only between two uiimages and uilabel. [imageview setuserinteractionenabled: Yes]; [self. view addsubview: imageview]; [imageview release]; // use a gesture to view the inheritance relationship. Is there any initializer of your own? Method // 1. click uitapgesturerecognizer * tap = [[uitapgesturerecognizer alloc] initwithtarget: Self action: @ selector (tapaction :)]; // you can click this button several times to trigger the method tap. numberoftapsrequired = 3; // 1.2 you need several fingers to click the tap. numberoftouchesrequired = 2; // 1.3 Add the gesture to the imageview [imageview addgesturerecognizer: tap]; [tap release]; * // 2. long press uilongpressgesturerecognizer * longpress = [[uilongpressgesturerecognizer alloc] initwithtarget: Self action: @ selector (longpressaction :)]; // 1.1 the shortest time required for longpress. minimumpressduration = 3; // The longpress distance that allows the user's fingers to move in the long-pressed process. allowablemovement = 300; [imageview addgesturerecognizer: longpress]; [longpress release]; * // 3. rotate uirotationgesturerecognizer * rotation = [[uirotationgesturerecognizer alloc] initwithtarget: Self action: @ selector (rotationaction :)]; [imageview addgesturerecogni ZER: rotation]; [rotation release]; * // 4. kneading keys * pinch = [[uipinchgesturerecognizer alloc] initwithtarget: Self action: @ selector (pinchaction :)]; [imageview addgesturerecognizer: pinch]; [pinch release]; * // 5. drag uipangesturerecognizer * Pan = [[uipangesturerecognizer alloc] initwithtarget: Self action: @ selector (panaction :)]; [imageview addgesturerecognizer: Pan]; [Pan relea Se]; * // 6. cleaning direction * swipe = [[uiswipegesturerecognizer alloc] initwithtarget: Self action: @ selector (awipeaction :)]; [imageview addgesturerecognizer: Swipe]; // direction of cleaning, swipe. direction = uiswipegesturerecognizerdireleft; [swipe release];} // 6. cleaning-(void) awipeaction :( uiswipegesturerecognizer *) awipe {If (awipe. direction = uiswipegesturerecognizerdirele Ft) {nslog (@ "Left") ;}nslog (@ "clean") ;}// 5. drag-(void) panaction :( uipangesturerecognizer *) Pan {uiimageview * view = (uiimageview *) Pan. view; // obtain the point where the gesture passes through cgpoint P = [Pan translationinview: View]; // modify the view's transform attribute. transform = cgaffinetransformtranslate (view. transform, P. x, p. y); // initialize the drag position [Pan settranslation: cgpointzero inview: View]; // nslog (@ "drag");} // 4. pinch-(void) pinchaction :( uipinchgesturereco Gnizer *) pinch {// The attempted Tranform attribute uiimageview * view = (uiimageview *) pinch. view; // indicates the direction of X and Y. // view. transform = cgaffinetransformmakescale (pinch. scale, pinch. scale); // reset after kneading // pinch view on the original basis. transform = cgaffinetransformscale (view. transform, pinch. scale, pinch. scale); pinch. scale = 1; nslog (@ "kneading");} // 3. rotation-(void) rotationaction :( uirotationgesturerecognizer *) Rotation {// transform attribute of the view --- deformation // 1. get Adder Trend view uiimageview * imageview = (uiimageview *) rotation. view; // 2. rotation Angle (attribute, angle) imageview. transform = cgaffinetransformrotate (imageview. transform, rotation. rotation); rotation. rotation = 0; // nslog (@ "Rotate");} // 2. long press-(void) longpressaction :( uilongpressgesturerecognizer *) longpress {// The Long press method is triggered in each State of the gesture. Therefore, you need to make a judgment. // longpress. state if (longpress. state = uigesturerecognizerstatebegan) {nslog (@ "Long press to start oh !! ");} Else if (longpress. State = uigesturerecognizerstateended) {nslog (@" Long press ends !! ") ;}} // 1. Click the trigger method of the gesture-(void) tapaction :( uitapgesturerecognizer *) tap {nslog (@", that's a tower! ");}-(Void) didreceivemorywarning {[Super didreceivemorywarning]; // dispose of any resources that can be recreated .}

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Six ways to use gestures