iOS 图片点击放大封装

来源：互联网发布：妆前乳知乎编辑：程序博客网时间：2024/06/06 03:18

封装类: SJAvatarBrowser.h

#import <Foundation/Foundation.h>#import <UIKit/UIKit.h>@interface SJAvatarBrowser : NSObject// 类方法+(void)showImage:(UIImageView *)avatarImageView;@end

#import "SJAvatarBrowser.h"static CGRect oldframe;@implementation SJAvatarBrowser+(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, [UIScreen 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.height-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

调用页面

#import "ViewController.h"#import "SJAvatarBrowser.h"@interface ViewController ()@property (nonatomic, strong)UIImageView *imageViews;@end@implementation ViewController- (void)viewDidLoad {    [super viewDidLoad];    self.imageViews = [[UIImageView alloc]init];    self.imageViews.image = [UIImage imageNamed:@"20120322222308426.jpg"];    self.imageViews.frame = CGRectMake((self.view.bounds.size.width - 200) / 2, 100, 200, 200);    self.imageViews.backgroundColor = [UIColor redColor];    self.imageViews.userInteractionEnabled = YES;    [self.view addSubview:self.imageViews];    UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(magnifyImage)];    [self.imageViews addGestureRecognizer:tap];}#pragma mark 调用图片放大功能- (void)magnifyImage {    NSLog(@"局部放大");    [SJAvatarBrowser showImage:self.imageViews];}@end

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