UI _ gestures and ui gestures

Source: Internet
Author: User

UI _ gestures and ui gestures
Pat gesture

// Create a pat gesture and bind the event UITapGestureRecognizer * aTapGR = [[initalloc] initWithTarget: self action: @ selector (tapGRAction :)]; // set the number of Pat times. aTapGR. numberOfTapsRequired = 1; // set the number of fingers to be touched. aTapGR. numberOfTouchesRequired = 1; // The simulator press alt to touch two fingers. // Add a gesture [self. rootView addGestureRecognizer: aTapGR]; [aTapGR release]; # pragma mark-pat gesture-(void) tapGRAction :( UITapGestureRecognizer *) sender {[self. rootView. aTextField resignFirstResponder]; // You can also disable rootVIew editing. // [self. rootView endEditing: YES];}
Long-pressed gesture
UILongPressGestureRecognizer * longPressGR = [[UILongPressGestureRecognizer alloc] initWithTarget: self action: @ selector (longPressGRAction :)]; [self. rootView addGestureRecognizer: longPressGR]; [longPressGR release]; # pragma mark-Long-press gesture-(void) longPressGRAction :( handle *) sender {// judgment, otherwise it will change twice if (sender. state = UIGestureRecognizerStateBegan) {CGFloat red = arc4random () % 256/255 .0; CGFloat green = arc4random () % 256/255 .0; CGFloat blue = arc4random () % 256/255 .0; self. rootView. backgroundColor = [UIColor colorWithRed: red green: green blue: blue alpha: 1] ;}}
Rotation gesture
UIRotationGestureRecognizer * rotationGR = [[UIRotationGestureRecognizer alloc] initWithTarget: self action: @ selector (rotationGRAction :)]; // Add the gesture to the image [self. rootView. opeImageView addGestureRecognizer: rotationGR]; [rotationGR release]; # pragma mark-rotation gesture-(void) rotationGRAction :( UIRotationGestureRecognizer *) sender {// operation object and Rotation Angle self. rootView. opeImageView. transform = CGAffineTransformRotate (self. rootView. opeImageView. transform, sender. rotation); // The rotation angle is 0 sender. rotation = 0; // you can replace the above two rows. // self. rootView. opeImageView. transform = CGAffineTransformMakeRotation (sender. rotation );}
Kneading gesture
UIPinchGestureRecognizer * pinchGR = [[UIPinchGestureRecognizer alloc] initWithTarget: self action: @ selector (pinchGRAction :)]; [self. rootView. opeImageView addGestureRecognizer: pinchGR]; [pinchGR release]; # pragma mark-kneading gesture-(void) pinchGRAction :( UIPinchGestureRecognizer *) sender {self. rootView. opeImageView. transform = CGAffineTransformScale (self. rootView. opeImageView. transform, sender. scale, sender. scale); // after scaling, the scaling ratio is reset to 1 sender. scale = 1 ;}
Translation gesture
UIPanGestureRecognizer * panGR = [[UIPanGestureRecognizer alloc] initWithTarget: self action: @ selector (panGRAction :)]; [self. rootView. opeImageView addGestureRecognizer: panGR]; [panGR release]; # pragma mark-translation gesture-(void) panGRAction :( alert *) sender {CGPoint = [sender translationInView: sender. view]; self. rootView. opeImageView. transform = CGAffineTransformTranslate (self. rootView. opeImageView. transform, point. x, point. y); // after translation, set the gesture to 0 relative to the view where it is located. [sender setTranslation: CGPointZero inView: sender. view];}
Swipe gesture
UISwipeGestureRecognizer * swipgr = [[UISwipeGestureRecognizer alloc] initWithTarget: self action: @ selector (swipeGRAction :)]; [self. rootView addGestureRecognizer: swipgv]; [swipgvrelease]; // a single gesture can only be swept in one direction, and multiple gestures can be written in multiple directions. direction = direction;/** typedef NS_OPTIONS (NSUInteger, UISwipeGestureRecognizerDirection) {uiswipegesturerecognizerdireright = 1 <0, direction = 1 <1, direction = 1 <2, handler = 1 <3}; */# pragma mark-sweep gesture-(void) swipeGRAction :( UISwipeGestureRecognizer *) sender {NSLog (@ "sweep gesture ");}
Sweep the screen edge
Optional * screenEdgePanGR = [[UIScreenEdgePanGestureRecognizer alloc] initWithTarget: self action: @ selector (screenEdgePanGRAction :)]; [self. rootView addGestureRecognizer: screenEdgePanGR]; [screenEdgePanGR release]; # pragma mark-screen edge cleaning gesture-(void) screenEdgePanGRAction :( UIScreenEdgePanGestureRecognizer *) sender {NSLog (@ "screen edge cleaning gesture");}-(void) didReceiveMemoryWarning {[super didreceivemorywarning]; // Dispose of any resources that can be recreated .}

Copyright Disclaimer: This article is an original article by the blogger and cannot be reproduced without the permission of the blogger.

Related Article

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.