图片点击放大
//
// 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
