iOS phase 35th Day notes (touch gesture Introduction)

Last Update:2015-08-30 Source: Internet

Author: User

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first, Touch gestures 1, using gestures to implement UIButton mobile effect instance code 1) create a class MyButton.h code implementation that inherits from UIButton<pre><pre>1 #import <UIKit/UIKit.h>2@interface mybutton:uibutton3@end </pre></pre>2) Code Implementation of MYBUTTON.M<pre>1 #import "MyButton.h"2 @implementationMyButton3 {4 Cgpoint _lastpoint;5 }6 7 //gesture started8-(void) touchesbegan: (nsset *) touches withevent: (uievent *)Event9 {TenUitouch *touch =[touches anyobject]; oneCgpoint point =[touch locationinview:self]; aNSLog (@"began:%@", Nsstringfromcgpoint (point)); -_lastpoint =point ; - } the --(void) touchesmoved: (nsset *) touches withevent: (uievent *)Event - { -Uitouch *touch =[touches anyobject]; +Cgpoint point =[touch locationinview:self]; -CGFloat offsetx = point.x-_lastpoint.x; +CGFloat offsety = point.y-_lastpoint.y; aSelf.center = Cgpointmake (self.center.x + offsetx, Self.center.y +offsety); atNSLog (@"moved:%@", Nsstringfromcgpoint (point)); - } - --(void) touchesended: (nsset *) touches withevent: (uievent *)Event - { -Uitouch *touch =[touches anyobject]; inCgpoint point =[touch locationinview:self]; -NSLog (@"end:%@", Nsstringfromcgpoint (point)); to } + @end </pre>3) code implementation in the parent view<pre>1 #import "ViewController.h"2 #import "MyButton.h"3 @interfaceViewcontroller ()4 {5MyButton *_v;6 Cgpoint _lastpoint;7 }8 @end9 Ten @implementationViewcontroller one a- (void) Viewdidload { - [super viewdidload]; -_v = [[MyButton Alloc]initwithframe:cgrectmake ( -, -, -, -)]; the_v.backgroundcolor =[uicolor redcolor]; - [self.view addsubview:_v]; - } - + //gesture started --(void) touchesbegan: (nsset *) touches withevent: (uievent *)Event + { aUitouch *touch =[touches anyobject]; atCgpoint point =[touch locationInView:self.view]; -NSLog (@"began:%@", Nsstringfromcgpoint (point)); -_lastpoint =point ; - } - --(void) touchesmoved: (nsset *) touches withevent: (uievent *)Event in { -Uitouch *touch =[touches anyobject]; toCgpoint point =[touch locationInView:self.view]; +CGFloat offsetx = point.x-_lastpoint.x; -CGFloat offsety = point.y-_lastpoint.y; the_v.center = Cgpointmake (_v.center.x + offsetx, _v.center.y +offsety); *_lastpoint =point ; $NSLog (@"moved:%@", Nsstringfromcgpoint (point));Panax Notoginseng } - the-(void) touchesended: (nsset *) touches withevent: (uievent *)Event + { aUitouch *touch =[touches anyobject]; theCgpoint point =[touch locationInView:self.view]; +NSLog (@"end:%@", Nsstringfromcgpoint (point)); - } $ $-(void) touchescancelled: (nsset *) touches withevent: (uievent *)Event - { - the } - @end</pre>2. Use touch gestures to implement the zoom and rotate effect instance code of the control<pre>1 #import "ViewController.h"2 //compliance with the proxy protocol for rotation and scaling3 @interfaceViewcontroller () <UIGestureRecognizerDelegate>4 @end5 6 @implementationViewcontroller7 8- (void) Viewdidload {9 [super viewdidload];Ten oneUiimageview *IMGV = [[uiimageview Alloc]initwithframe:cgrectmake (0,0, $, $)]; aImgv.center =self.view.center; - [self.view addsubview:imgv]; -Imgv.image = [UIImage imagenamed:@"3"]; theimgv.userinteractionenabled =YES; - - //Tap gestures -UITapGestureRecognizer *tap =[[uitapgesturerecognizer alloc]initwithtarget:self action: @selector (tapges:)]; + - //set the hand index required for this gesture +tap.numberoftouchesrequired =2; a at //set the number of clicks for this gesture -tap.numberoftapsrequired =4; - [IMGV addgesturerecognizer:tap]; - - //panning gestures, dragging gestures -Uipangesturerecognizer *pan =[[uipangesturerecognizer alloc]initwithtarget:self action: @selector (panges:)]; in [IMGV addgesturerecognizer:pan]; - to //Zoom gesture +Uipinchgesturerecognizer *pinch =[[uipinchgesturerecognizer alloc]initwithtarget:self action: @selector (pinchges:)]; - [IMGV addgesturerecognizer:pinch]; thePinch.Delegate=self ; * $ //RotatePanax NotoginsengUirotationgesturerecognizer *rotation =[[uirotationgesturerecognizer alloc]initwithtarget:self action: @selector (rotationges:)]; - [IMGV addgesturerecognizer:rotation]; theRotation.Delegate=self ; + } a the //the return value Indicates whether other gestures (gestures relative to the proxy have been set) can be recognized at the same time +-(BOOL) gesturerecognizer: (uigesturerecognizer *) Gesturerecognizer Shouldrecognizesimultaneouslywithgesturerecognizer: (uigesturerecognizer *) Othergesturerecognizer - { $ returnYES; $ } --(void) Rotationges: (uirotationgesturerecognizer *) Rotation - { theRotation.view.transform =cgaffinetransformrotate (rotation.view.transform, rotation.rotation); -Rotation.rotation =0.0;Wuyi } the-(void) Pinchges: (uipinchgesturerecognizer *) Pinch - { wu //transform: affine transformations - //pinch.scale, It's The pinch magnification of the Pinch. aboutPinch.view.transform =cgaffinetransformscale (pinch.view.transform, pinch.scale, pinch.scale); $ - //Magnification Reduction -Pinch.scale =1.0; - } a-(void) Panges: (uipangesturerecognizer *) Pan + { the //returns the offset of the current gesture -Cgpoint offset =[pan translationInView:pan.view]; $ //Pan.view is the view that the pan gesture adds to thePan.view.center = Cgpointmake (pan.view.center.x + offset.x, Pan.view.center.y +offset.y); the //after moving, return the offset to 0 the [pan Settranslation:cgpointzero inView:pan.view]; the } - in-(void) Tapges: (uigesturerecognizer *) Tap the { theNSLog (@"=========="); about } the @end</pre>iOS phase 35th Day notes (touch gesture Introduction)

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iOS phase 35th Day notes (touch gesture Introduction)

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