【IOS】扩展UIImageViewEx实现：手势移动,旋转,缩放（附带一个收缩的文字标签功能）

#import <UIKit/UIKit.h> #import <QuartzCore/QuartzCore.h> typedef enum{ UIImageExNormal = 0, UIImageExFull }UIImageExState; @interface UIImageViewEx : UIImageView<UIGestureRecognizerDelegate> { UIView *parentview; //父窗口，即用将UIImageEx所加到的UIView BOOL isPanEnable; //是否可以移动 BOOL isPinchEnable; //是否可以放大缩小 BOOL isRotateEnable; //是否可以旋转 BOOL isTap; //是否可以点击触摸 UIImageExState imageState; //图片当前状态 CGFloat imageScale; //最大缩放的倍数 CGFloat imageSize; //记录图片的累计缩放 CGFloat imageRotation; //记录图片的原始角度 CGPoint imagePoint; //记录图片的原始位置 UITextView *textView; //动态弹出的文本 } @property (nonatomic,retain) UIView *parentview; @property (nonatomic) CGFloat imageSize; @property (nonatomic) CGFloat imageRotation; @property (nonatomic) CGPoint imagePoint; @property BOOL isPanEnable; @property BOOL isRotateEnable; @property BOOL isPinchEnable; @property BOOL isTap; - (void)handlePan:(UIPanGestureRecognizer *)recognizer; - (void)handlePinch:(UIPinchGestureRecognizer *)recognizer; - (void)handleRotate:(UIRotationGestureRecognizer *)recognizer; - (void)handleTap:(UITapGestureRecognizer *)recognizer; //必须设置的 - (void)setScaleAndRotation:(UIView*)imageView; - (void)setInfoText:(NSString *)string; - (void)setShadow:(BOOL)isShadow; @end
#import "UIImageViewEx.h" @implementation UIImageViewEx @synthesize parentview; @synthesize isRotateEnable,isPanEnable,isPinchEnable,isTap; @synthesize imageSize,imageRotation,imagePoint; /* * SetScaleAndRotation 实现 ImageView的 手势旋转，缩放，和移动 * @parent UIView 父窗口 */ - (void)setScaleAndRotation:(UIView*) parent { parentview=parent; parentview.userInteractionEnabled=YES; isPanEnable=YES; isPinchEnable=YES; isRotateEnable=YES; isTap = YES; imageSize=1; imageRotation=0; imageScale= self.parentview.frame.size.width/self.frame.size.width; imagePoint=self.frame.origin; self.userInteractionEnabled=YES; UIPanGestureRecognizer *panRcognize=[[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(handlePan:)]; panRcognize.delegate=self; [panRcognize setEnabled:YES]; [panRcognize delaysTouchesEnded]; [panRcognize cancelsTouchesInView]; UIPinchGestureRecognizer *pinchRcognize=[[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(handlePinch:)]; [pinchRcognize setEnabled:YES]; [pinchRcognize delaysTouchesEnded]; [pinchRcognize cancelsTouchesInView]; UIRotationGestureRecognizer *rotationRecognize=[[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(handleRotate:)]; [rotationRecognize setEnabled:YES]; [rotationRecognize delaysTouchesEnded]; [rotationRecognize cancelsTouchesInView]; rotationRecognize.delegate=self; pinchRcognize.delegate=self; UITapGestureRecognizer *tapRecognize = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(handleTap:)]; tapRecognize.numberOfTapsRequired = 1; tapRecognize.delegate = self; [tapRecognize setEnabled :YES]; [tapRecognize delaysTouchesBegan]; [tapRecognize cancelsTouchesInView]; [self addGestureRecognizer:rotationRecognize]; [self addGestureRecognizer:panRcognize]; [self addGestureRecognizer:pinchRcognize]; [self addGestureRecognizer:tapRecognize]; } /* * setInfoText 设置介绍文字 * @string NSString 显示的文字 */ - (void)setInfoText:(NSString *)string { if (textView!=nil) { [textView removeFromSuperview]; textView = nil; } textView = [[UITextView alloc]initWithFrame:CGRectMake(0, 0, 0, 30)]; textView.text = string; textView.hidden = YES; textView.backgroundColor = [UIColor blueColor]; textView.textColor =[UIColor whiteColor]; [self addSubview:textView]; } /* * SetShadow 设置是否开启阴影效果 * @isShadow BOOL YES 开启，NO 关闭 */ - (void)setShadow:(BOOL)isShadow { if (!isShadow) { [[self layer] setShadowOffset:CGSizeMake(0, 0)]; [[self layer] setShadowRadius:0]; [[self layer] setShadowOpacity:1]; [[self layer] setShadowColor:[UIColor whiteColor].CGColor]; return; } [[self layer] setShadowOffset:CGSizeMake(3, 3)]; [[self layer] setShadowRadius:3]; [[self layer] setShadowOpacity:0.5]; [[self layer] setShadowColor:[UIColor blackColor].CGColor]; } #pragma UIGestureRecognizer Handles /* * 移动图片处理的函数 * @recognizer 移动手势 */ - (void)handlePan:(UIPanGestureRecognizer *)recognizer { if (!isPanEnable) { return; } [self setShadow:YES]; CGPoint translation = [recognizer translationInView:parentview]; recognizer.view.center = CGPointMake(recognizer.view.center.x + translation.x, recognizer.view.center.y + translation.y); [recognizer setTranslation:CGPointMake(0, 0) inView:parentview]; if (recognizer.state == UIGestureRecognizerStateEnded) { [UIView animateWithDuration:0.75 delay:0 options:UIViewAnimationOptionCurveEaseOut animations:^{ recognizer.view.center=CGPointMake(imagePoint.x+self.frame.size.width/2, imagePoint.y+self.frame.size.height/2); } completion:nil]; [self setShadow:NO]; } } /* * handPinch 缩放的函数 * @recognizer UIPinchGestureRecognizer 手势识别器 */ - (void)handlePinch:(UIPinchGestureRecognizer *)recognizer{ if (!isPinchEnable) { return; } imageSize*=recognizer.scale; recognizer.view.transform = CGAffineTransformScale(recognizer.view.transform, recognizer.scale, recognizer.scale); if (recognizer.state==UIGestureRecognizerStateEnded) { [UIView animateWithDuration:.35 animations:^{ if (imageSize >=1 && imageState == UIImageExNormal) { recognizer.view.transform = CGAffineTransformScale(recognizer.view.transform,imageScale/imageSize, imageScale/imageSize); imageState = UIImageExFull; } else if(imageSize<1 && imageState == UIImageExFull) { recognizer.view.transform = CGAffineTransformScale(recognizer.view.transform, 1/(imageScale*imageSize), 1/(imageScale*imageSize)); imageState = UIImageExNormal; }else { recognizer.view.transform = CGAffineTransformScale(recognizer.view.transform, 1/imageSize,1/imageSize); } [UIView animateWithDuration:0.35 delay:0 options:UIViewAnimationOptionCurveEaseOut animations:^{ recognizer.view.center=CGPointMake(imagePoint.x+self.frame.size.width/2, imagePoint.y+self.frame.size.height/2); } completion:nil]; recognizer.scale = 1; imageSize = 1; }]; } recognizer.scale = 1; } /* * handleRotate 旋转的函数 * recognizer UIRotationGestureRecognizer 手势识别器 */ - (void)handleRotate:(UIRotationGestureRecognizer *)recognizer{ if (!isRotateEnable) { return; } imageRotation+=recognizer.rotation; recognizer.view.transform = CGAffineTransformRotate(recognizer.view.transform, recognizer.rotation); if (recognizer.state==UIGestureRecognizerStateEnded) { [UIView animateWithDuration:.35 animations:^{ recognizer.view.transform = CGAffineTransformRotate(recognizer.view.transform, -imageRotation); recognizer.view.center=CGPointMake(imagePoint.x+self.frame.size.width/2, imagePoint.y+self.frame.size.height/2); }]; imageRotation=0; } recognizer.rotation = 0; } /* * handleTap 触摸函数 * @recognizer UITapGestureRecognizer 触摸识别器 */ -(void) handleTap:(UITapGestureRecognizer *)recognizer { if (!isTap) { return; } if (textView.hidden) { [UIView animateWithDuration:0.35 delay:0.15 options:UIViewAnimationOptionTransitionCurlUp animations:^{ textView.hidden = NO; textView.frame = CGRectMake(0, 0, 120, 30); } completion:nil]; }else { [UIView animateWithDuration:0.35 delay:0.15 options:UIViewAnimationOptionTransitionCurlUp animations:^{ textView.frame = CGRectMake(0, 0, 0, 30); } completion:^(BOOL finished){ if (finished){ textView.hidden = YES; } }]; } } #pragma UIGestureRecognizerDelegate /* * gestureRecognizer 实现了委托，从而实现可以同时接受多个手势 * @return YES 则可以接受多个手势，NO 则同时只能接受一个手势 */ - (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer { return YES; } @end