iOS 点击图片放大效果的实现

今天带来的是图片点击放大效果,这种效果一般在微博,微信朋友圈中比较常见

当我点击其中一张图片时,就会进入详情

具体实现如下
首先创建个 Controller（PhotoViewController）

// // PhotoViewController.h // 点击图片放大效果 // // Created by Amydom on 17/1/9. // Copyright © 2017年 Amydom. All rights reserved. //#import <UIKit/UIKit.h>@interface PhotoViewController : UIViewController//保存图片的数组 @property （nonatomic, strong）NSMutableArray *photoArr; //图片 tag @property （nonatomic, assign）NSInteger imageTag;@end

// // PhotoViewController.m // 点击图片放大效果 // // Created by Amydom on 17/1/9. // Copyright © 2017年 Amydom. All rights reserved. //#import "PhotoViewController.h"@interface PhotoViewController （）@end@implementation PhotoViewController- （void）viewDidLoad { [super viewDidLoad];UIScrollView *myScrollView = [[UIScrollView alloc] initWithFrame:CGRectMake（0, 0, 375, 667）];myScrollView.backgroundColor = [UIColor blackColor]; myScrollView.pagingEnabled = YES; myScrollView.bounces = NO;[self.view addSubview:myScrollView]; //根据tag 来获取当前点击的图片 myScrollView.contentOffset = CGPointMake（self.view.frame.size.width * self.imageTag, 10）;myScrollView.contentSize = CGSizeMake（self.view.frame.size.width * self.photoArr.count, 667）; //创建 for （int i = 0; i < self.photoArr.count; i++） { UIImageView *img = [[UIImageView alloc] initWithFrame:CGRectMake（self.view.frame.size.width * i + 10, 0, self.view.frame.size.width - 20, self.view.frame.size.height）]; NSString *imgName = self.photoArr[i]; img.image = [UIImage imageNamed:imgName];[myScrollView addSubview:img];//自适应图片大小 img.contentMode = UIViewContentModeScaleAspectFit;}//轻拍跳出照片浏览 UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector（tapAction）];[myScrollView addGestureRecognizer:tap];}- （void）tapAction { [self dismissViewControllerAnimated:YES completion:^{ }]; }- （void）didReceiveMemoryWarning { [super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated. }/* #pragma mark - Navigation// In a storyboard-based application, you will often want to do a little preparation before navigation - （void）prepareForSegue:（UIStoryboardSegue *）segue sender:（id）sender { // Get the new view controller using [segue destinationViewController]. // Pass the selected object to the new view controller. } */@end

然后在 ViewController 中创建四张小图片,添加轻拍手势

// // ViewController.m // 点击图片放大效果 // // Created by Amydom on 17/1/9. // Copyright © 2017年 Amydom. All rights reserved. //#import "ViewController.h" #import "PhotoViewController.h"@interface ViewController （）{NSMutableArray *array;}@end@implementation ViewController- （void）viewDidLoad { [super viewDidLoad]; self.view.backgroundColor = [UIColor whiteColor]; array = [NSMutableArray arrayWithObjects:@"1.jpg", @"2.jpg",@"3.jpg",@"4.jpg", nil nil]; for （int i = 0; i < array.count; i++） {UIImageView *img = [[UIImageView alloc] initWithFrame:CGRectMake（20 + 880 * i, 100, 70, 70）]; img.image = [UIImage imageNamed:[array objectAtIndex:i]];img.userInteractionEnabled = YES;//截掉边框 img.clipsToBounds = YES;img.tag = 1000 + i;UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector（TapAction:）];[img addGestureRecognizer:tap];[self.view addSubview:img]; }}- （void）TapAction:（UITapGestureRecognizer *）tap{PhotoViewController *photoVC = [[PhotoViewController alloc] init]; photoVC.imageTag = tap.view.tag - 1000 ;//获取当前被点击图片的 tag photoVC.photoArr = array; [photoVC setModalTransitionStyle:UIModalTransitionStyleCrossDissolve];// 效果 [self presentModalViewController:photoVC animated:YES];} - （void）didReceiveMemoryWarning { [super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated. } @end

这样就可以实现啦........当然这里只是单纯的实现功能,至于想要图片循环什么的还是需要根据需求自行添加..

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。