Click on the image to enlarge, click again to zoom out to the original place

First write a class write amplification method

  bigimage.h//  tapimagebigandsmall////  Created by lxy on 15-4-7.//  Copyright (c) 2015 Shenzhen MSD Technology Co.,ltd. All rights reserved.//#import <Foundation/Foundation.h> #import <UIKit/UIKit.h> @interface bigimage: nsobject+ (void) ShowImage: (Uiimageview *) avatarimageview;+ (void) Hideimage: (uitapgesturerecognizer*) tap; @end

Implementation method

bigimage.m//tapimagebigandsmall////Created by Lxy on 15-4-7.//Copyright (c) 2015 Shenzhen MSD technology Co., LTD. All rights reserved.//#import "BigImage.h" @implementation bigimagestatic cgrect oldframe;+ (void) ShowImage: (    Uiimageview *) avatarimageview{UIImage *image = avatarimageview.image;    UIWindow *window = [UIApplication Sharedapplication].keywindow; UIView *backgroundview = [[UIView alloc]initwithframe:cgrectmake (0, 0, [UIScreen mainscreen].bounds.size.width, [UISCR    Een mainscreen].bounds.size.height)];    Oldframe = [Avatarimageview convertRect:avatarImageView.bounds Toview:window];    Backgroundview.backgroundcolor = [Uicolor blackcolor];    Backgroundview.alpha = 0;    Uiimageview *imageview = [[Uiimageview alloc]initwithframe:oldframe];    Imageview.image = image;    Imageview.tag = 1;    [Backgroundview Addsubview:imageview];        [Window Addsubview:backgroundview]; UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc]initwithtarget:self ACtion: @selector (hideimage:)];        [Backgroundview Addgesturerecognizer:tap]; [UIView animatewithduration:0.3 animations:^{imageview.frame=cgrectmake (0, ([UIScreen Mainscreen].bounds.size.heig Ht-image.size.height*[uiscreen mainscreen].bounds.size.width/image.size.width)/2, [UIScreen MainScreen].        Bounds.size.width, Image.size.height*[uiscreen mainscreen].bounds.size.width/image.size.width);    Backgroundview.alpha = 1;       } completion:^ (BOOL finished) {}];    }+ (void) Hideimage: (uitapgesturerecognizer*) tap{UIView *backgroundview = Tap.view;    Uiimageview *imageview = (uiimageview*) [Tap.view viewwithtag:1];        [UIView animatewithduration:0.3 animations:^{imageview.frame = oldframe;    Backgroundview.alpha = 0;    } completion:^ (BOOL finished) {[Backgroundview Removefromsuperview];        }]; } @end

In the View controller

viewcontroller.m//tapimagebigandsmall////Created by Lxy on 15-4-7.//Copyright (c) 2015 Shenzhen MSD Technolog Y Co.,ltd. All rights reserved.//#import "ViewController.h" #import "BigImage.h" @interface Viewcontroller () @property (nonatomic,    Strong) Uiimageview *image, @end @implementation viewcontroller-(void) viewdidload {[Super viewdidload];    Self.view.backgroundColor = [Uicolor Magentacolor];    Self.image = [[Uiimageview alloc]initwithframe:cgrectmake (100, 100, 100, 100)];    _image.image = [UIImage imagenamed:@ "Me"];    _image.userinteractionenabled = YES;        [Self.view Addsubview:_image]; /** * Add gestures to images click to enlarge picture */UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc]initwithtarget:self Act    Ion: @selector (Tapclick)];        [Self.image Addgesturerecognizer:tap];                /** * A picture revolves around a circle of circles *///[self animationstart]; }-(void) tapclick{[bigimage showimage:_image];} -(void) animationstart{UIImage *image=[uiimage Imagenamed:@ "Me"];    Calayer *flystarlayer=[calayer layer];    Flystarlayer.bounds=cgrectmake (0, 0, 20, 20); flystarlayer.contents= (ID) image.    Cgimage;        [Self.view.layer Addsublayer:flystarlayer];    Cakeyframeanimation *keyanimation=[cakeyframeanimation animationwithkeypath:@ "position"];    keyanimation.duration=5.0;    Keyanimation.removedoncompletion=no;    NSNumber *number1=[nsnumber numberwithfloat:0.0];    NSNumber *number2=[nsnumber numberwithfloat:0.2];    NSNumber *number3=[nsnumber numberwithfloat:0.8];    Keyanimation.keytimes=[nsarray Arraywithobjects:number1,number2,number3, nil];    Keyanimation.fillmode=kcafillmodeforwards;        Keyanimation.repeatcount=1;        Cgmutablepathref circlepath=cgpathcreatemutable ();    Cgpathaddarc (Circlepath, nil, 0, 4*M_PI, 0);    Keyanimation.path=circlepath;    Cgpathrelease (Circlepath); [Flystarlayer addanimation:keyanimation forkey:nil];}

Click on the image to enlarge, click again to zoom out to the original place