//

//  ViewController.m

//  图片点击放大

//

//  Created by xueshan on 17/1/19.

//  Copyright ? 2017年 xueshan. All rights reserved.

//

#import "ViewController.h"

#import <QuartzCore/QuartzCore.h>

//设置放大后图片的宽高，为了省时间，偷了下懒，建议最好结合实际做下运算

#define BIG_IMG_WIDTH  325

#define BIG_IMG_HEIGHT 325

@interface ViewController ()

@property (strong, nonatomic) IBOutlet UIImageView *minImageView;

@end

@implementation ViewController{

    UIView *background;

}

- (void)viewDidLoad {

    [super viewDidLoad];

    // Do any additional setup after loading the view, typically from a nib.

    //允许用户交互

    _minImageView.userInteractionEnabled = YES;

    //添加点击手势

    UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(tapAction)];

    [_minImageView addGestureRecognizer:tapGesture];

}

//点击图片后的方法(即图片的放大全屏效果)

- (void) tapAction{

    //创建一个黑色背景

    //初始化一个用来当做背景的View。我这里为了省时间计算，宽高直接用的5s的尺寸

    UIView *bgView = [[UIView alloc]initWithFrame:CGRectMake(0, 0, 320, 600)];

    background = bgView;

    [bgView setBackgroundColor:[UIColor blackColor]];

    [self.view addSubview:bgView];

    //创建显示图像的视图

    //初始化要显示的图片内容的imageView（这里位置继续偷懒...没有计算）

    UIImageView *imgView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 100, BIG_IMG_WIDTH, BIG_IMG_HEIGHT)];

    //要显示的图片，即要放大的图片

    [imgView setImage:[UIImage imageNamed:@"企业证书账单"]];

    [bgView addSubview:imgView];

    imgView.userInteractionEnabled = YES;

    //添加点击手势（即点击图片后退出全屏）

    UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(closeView)];

    [imgView addGestureRecognizer:tapGesture];

    [self shakeToShow:bgView];//放大过程中的动画

}

-(void)closeView{

    [background removeFromSuperview];

}

//放大过程中出现的缓慢动画

- (void) shakeToShow:(UIView*)aView{

    CAKeyframeAnimation* animation = [CAKeyframeAnimation animationWithKeyPath:@"transform"];

    animation.duration = 0.5;

    NSMutableArray *values = [NSMutableArray array];

    [values addObject:[NSValue valueWithCATransform3D:CATransform3DMakeScale(0.1, 0.1, 1.0)]];

    [values addObject:[NSValue valueWithCATransform3D:CATransform3DMakeScale(1.0, 1.0, 1.0)]];

    animation.values = values;

    [aView.layer addAnimation:animation forKey:nil];

}

- (void)didReceiveMemoryWarning {

    [super didReceiveMemoryWarning];

    // Dispose of any resources that can be recreated.

}

@end

图片点击放大