A summary of various gestures

First, the Viewcontroller to abide by the gesture protocol.

@interface Viewcontroller () <UIGestureRecognizerDelegate>

{

Uiimageview *_imageview;

}

Common gestures

/*

UITapGestureRecognizer Tap (click)

Uipinchgesturerecognizer Pinch (pinch/two fingers inward or outward)

Uirotationgesturerecognizer Rotation (swivel)

Uiswipegesturerecognizer Swipe (sliding, fast moving)

Uipangesturerecognizer Pan (drag, slow move)

Uilongpressgesturerecognizer longpress (Long Press)

*/

Alt/option will appear two fingers in the simulator

-(void) creatview{

_imageview = [[Uiimageview alloc] Initwithframe:cgrectmake (60, 100, 200, 300)];

_imageview.image = [UIImage imagenamed:@ "girl.jpg"];

I want _imageview to interact with the user, like click and rotate, and so on.

The first step must open user interaction

_imageview.userinteractionenabled = YES;

And then you can just add a gesture.

[Self.view Addsubview:_imageview];

}

First, the use of sliding gestures

#pragma mark-Swipe

-(void) CreatGuesture5 {

Swipe gesture 2048

Uiswipegesturerecognizer *swipe = [[Uiswipegesturerecognizer alloc] initwithtarget:self action: @selector (Swipeclick :)];

Set direction

Swipe.direction = Uiswipegesturerecognizerdirectionleft;

/*

Uiswipegesturerecognizerdirectionright Swipe Right

Uiswipegesturerecognizerdirectionleft

Uiswipegesturerecognizerdirectionup

Uiswipegesturerecognizerdirectiondown

*/

A gesture can only be set in one direction, there are swipe gestures in all four directions, and four swipe gestures must be created

[_imageview Addgesturerecognizer:swipe];

[Swipe release];

}

-(void) Swipeclick: (Uiswipegesturerecognizer *) Swipe {

NSLog (@ "swipe");

Switch (swipe.direction) {

Case Uiswipegesturerecognizerdirectionleft:

{

NSLog (@ "swipe left");

}

Break

Case Uiswipegesturerecognizerdirectionright:

{

NSLog (@ "right swipe");

}

Break

Case Uiswipegesturerecognizerdirectionup:

{

NSLog (@ "swipe up");

}

Break

Case Uiswipegesturerecognizerdirectiondown:

{

NSLog (@ "swipe down");

}

Break

Default

Break

}

}

2048 slide

#import "RootViewController.h"

@interface Rootviewcontroller ()

@end

@implementation Rootviewcontroller

{

UILabel *_label;

}

-(void) dealloc{

[_label release];

[Super Dealloc];

}

-(ID) Initwithnibname: (NSString *) Nibnameornil Bundle: (NSBundle *) Nibbundleornil

{

self = [super Initwithnibname:nibnameornil Bundle:nibbundleornil];

if (self) {

Custom initialization

}

return self;

}

-(void) creatlabel{

_label = [[UILabel alloc] Initwithframe:cgrectmake (110, 100, 100, 100)];

_label.text = @ "2";

_label.layer.maskstobounds = YES;

_label.layer.cornerradius = 5;

_label.textalignment = Nstextalignmentcenter;

_label.backgroundcolor = [Uicolor Redcolor];

[Self.view Addsubview:_label];

}

-(void) viewdidload

{

[Super Viewdidload];

Do any additional setup after loading the view.

[Self Creatlabel];

Uiswipegesturerecognizerdirection Num[4] = {

Uiswipegesturerecognizerdirectionright,

Uiswipegesturerecognizerdirectionleft,

Uiswipegesturerecognizerdirectionup,

Uiswipegesturerecognizerdirectiondown

};

Create a swipe gesture in four directions

for (int i = 0; i < 4; i++) {

Create a swipe gesture

Uiswipegesturerecognizer *swipe = [[Uiswipegesturerecognizer alloc] initwithtarget:self action: @selector (swipe:)];

Set gesture Direction

Swipe.direction = Num[i];

Add swipe gestures to the current interface

[Self.view Addgesturerecognizer:swipe];

[Swipe release];

}

}

This function is triggered when the finger slides up or down the screen.

-(void) Swipe: (Uiswipegesturerecognizer *) sw{

Switch (sw.direction) {//direction of gesture

Swipe right

Case Uiswipegesturerecognizerdirectionright:

{

_label.center = Cgpointmake (_label.center.x+100, _LABEL.CENTER.Y);

}

Break

Swipe left

Case Uiswipegesturerecognizerdirectionleft:

{

_label.center = Cgpointmake (_label.center.x-100, _LABEL.CENTER.Y);

}

Break

Swipe up

Case Uiswipegesturerecognizerdirectionup:

{

_label.center = Cgpointmake (_label.center.x, _label.center.y-100);

}

Break

Swipe down

Case Uiswipegesturerecognizerdirectiondown:

{

_label.center = Cgpointmake (_label.center.x, _label.center.y+100);

}

Break

Default

Break

}

}

Second, rotate, pinch, click

#pragma mark-Gesture protocol

Whether to allow two gestures to be valid at the same time (proxy method)

-(BOOL) Gesturerecognizer: (Uigesturerecognizer *) Gesturerecognizer Shouldrecognizesimultaneouslywithgesturerecognizer: (Uigesturerecognizer *) Othergesturerecognizer {

NSLog (@ "%@-%@", [Gesturerecognizer Class],[othergesturerecognizer class]);

return YES;

}

#pragma mark-rotate gesture

-(void) CreatGuesture3 {

Uirotationgesturerecognizer *rotation = [[Uirotationgesturerecognizer alloc] initwithtarget:self action: @selector ( Rotationclick:)];

Set up the proxy (if you want two gestures to work simultaneously) rotation and kneading are valid simultaneously

Rotation.delegate = self;

[_imageview addgesturerecognizer:rotation];

[Rotation release];

}

Always called during rotation

-(void) Rotationclick: (Uirotationgesturerecognizer *) Rotation {

NSLog (@ "r:%f", rotation.rotation);//gesture Rotation angle

Each time is relative to the current rotation (the current is the reference)

_imageview.transform = Cgaffinetransformrotate (_imageview.transform, rotation.rotation);

The relative radian should be reset to 0

rotation.rotation = 0;

}

#pragma mark-pinch gesture

-(void) CreatGuesture2 {

Pinch gesture two fingers

Uipinchgesturerecognizer *pinch = [[Uipinchgesturerecognizer alloc] initwithtarget:self action: @selector (Pinchclick :)];

Set up the proxy (if you want two gestures to work simultaneously)

Pinch.delegate = self;

[_imageview Addgesturerecognizer:pinch];

[Pinch release];

}

As long as the pinch will always be called

-(void) Pinchclick: (Uipinchgesturerecognizer *) Pinch {

NSLog (@ "kneading%f", Pinch.scale);

Can be scaled

Pinch.scale to get gesture proportions

Equivalent to the most primitive

_imageview.transform = Cgaffinetransformmakescale (Pinch.scale, Pinch.scale);

Relative to the current _imageview.transform

_imageview.transform = Cgaffinetransformscale (_imageview.transform, Pinch.scale, Pinch.scale);

Resetting the gesture ratio to 1 should always be relative.

Pinch.scale = 1;

}

#pragma mark-click gestures

-(void) CreatGuesture1 {

UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initwithtarget:self action: @selector (Tapclick:)];

Set the number of clicks (1 means click 2 means double-click)

tap.numberoftapsrequired = 2;

Set the number of fingers

tap.numberoftouchesrequired = 1;

Uigesturerecognizer all gestures in the parent class

Add gestures to the picture view

[_imageview Addgesturerecognizer:tap];

[Tap release];

}

-(void) Tapclick: (UITapGestureRecognizer *) Tap {

NSLog (@ "tap gesture");

}

Three, drag, drag gestures

#pragma mark-Move/drag

-(void) CreatGuesture4 {

Uipangesturerecognizer *pan = [[Uipangesturerecognizer alloc] initwithtarget:self action: @selector (Panclick:)];

[_imageview Addgesturerecognizer:pan];

[Pan release];

}

-(void) Panclick: (Uipangesturerecognizer *) Pan {

Gets the offset of the drag gesture relative to the Self.view

Cgpoint curpoint = [Pan TranslationInView:self.view];

NSLog (@ "%@", Nsstringfromcgpoint (Curpoint));

Cgpoint Center = _imageview.center;

Center.x + = Curpoint.x;

Center.y + = Curpoint.y;

_imageview.center = center;

Reset Offset to 0 Cgpointzero = 0 0

[Pan Settranslation:cgpointzero InView:self.view];

}

Four, long press gestures

#pragma mark-long press gestures

-(void) CreatGuesture6 {

Long press DELETE/voice

Uilongpressgesturerecognizer *longpress = [[Uilongpressgesturerecognizer alloc] initwithtarget:self action: @selector (Pressclick:)];

[_imageview addgesturerecognizer:longpress];

[Longpress release];

}

-(void) Pressclick: (Uilongpressgesturerecognizer *) longpress {

NSLog (@ "long press");

Will trigger two times a long press the beginning of the time there is a long press the end of the time

We have to deal with this phenomenon.

Uigesturerecognizerstatebegan//Start

Uigesturerecognizerstateended End

if (longpress.state = = Uigesturerecognizerstatebegan) {

NSLog (@ "Long Press to start");

}

}

A summary of various gestures