15

我在 UITableviewCell 中有一个 UIImageView。当它被点击时, UIImageView 应该动画以全屏显示。当图像在全屏时被点击时,它应该收缩回原来的位置。

如何做到这一点?

4

5 回答 5

28

将手势识别器添加到视图控制器。

将手势识别器添加到您的头文件中

@interface viewController : UIViewController <UIGestureRecognizerDelegate>{
    UITapGestureRecognizer *tap;
    BOOL isFullScreen;
    CGRect prevFrame;
}

在你的 viewDidLoad 添加这个:

isFullScreen = false;
tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(imgToFullScreen)];
tap.delegate = self;

添加以下委托方法:

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch;
{
    BOOL shouldReceiveTouch = YES;

    if (gestureRecognizer == tap) {
        shouldReceiveTouch = (touch.view == yourImageView);
    }
    return shouldReceiveTouch;
}

现在你只需要实现你的 imgToFullScreen 方法。确保您使用 isFullScreen Bool (如果它是假的,则全屏,如果它是真的,则返回旧尺寸)

imgToFullScreen 方法取决于您希望如何使图像变为全屏。一种方法是:(这是未经测试的,但应该可以)

-(void)imgToFullScreen{
    if (!isFullScreen) {
        [UIView animateWithDuration:0.5 delay:0 options:0 animations:^{
            //save previous frame
            prevFrame = yourImageView.frame;
            [yourImageView setFrame:[[UIScreen mainScreen] bounds]];
        }completion:^(BOOL finished){
            isFullScreen = true;
        }];
        return;
    } else {
        [UIView animateWithDuration:0.5 delay:0 options:0 animations:^{
            [yourImageView setFrame:prevFrame];
        }completion:^(BOOL finished){
            isFullScreen = false;
        }];
        return;
    }
}
于 2012-09-18T16:29:07.737 回答
6

@AzzUrr1 中的代码、小错误更正(括号)和 Tapper 的实现略有不同。

为我工作。现在用scrollView实现它会很棒,如果图片更大,用户可以放大/缩小..有什么建议吗?

视图控制器.h

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController  <UIGestureRecognizerDelegate>{
    UITapGestureRecognizer *tap;
    BOOL isFullScreen;
    CGRect prevFrame;
}
@property (nonatomic, strong) UIImageView *imageView; 

@end

视图控制器.m

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    isFullScreen = FALSE;
    tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(imgToFullScreen)];
    tap.delegate = self;
    self.view.backgroundColor = [UIColor purpleColor];

    _imageView = [[UIImageView alloc] initWithFrame:CGRectMake(10, 10, 300, 200)];
    _imageView.contentMode = UIViewContentModeScaleAspectFill;
    [_imageView setClipsToBounds:YES];
    _imageView.userInteractionEnabled = YES;
    _imageView.image = [UIImage imageNamed:@"Muppetshow-2.png"];

    UITapGestureRecognizer *tapper = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(imgToFullScreen:)];
    tapper.numberOfTapsRequired = 1;

    [_imageView addGestureRecognizer:tapper];

    [self.view addSubview:_imageView];
}

-(void)imgToFullScreen:(UITapGestureRecognizer*)sender {
    if (!isFullScreen) {
        [UIView animateWithDuration:0.5 delay:0 options:0 animations:^{
            //save previous frame
            prevFrame = _imageView.frame;
            [_imageView setFrame:[[UIScreen mainScreen] bounds]];
        }completion:^(BOOL finished){
            isFullScreen = TRUE;
        }];
        return;
    }
    else{
        [UIView animateWithDuration:0.5 delay:0 options:0 animations:^{
            [_imageView setFrame:prevFrame];
        }completion:^(BOOL finished){
            isFullScreen = FALSE;
        }];
        return;
    }
}
于 2013-08-14T19:25:48.213 回答
2

我最终使用了MHFacebookImageViewer。集成很容易,没有子类化UIImageView,并且它还具有图像缩放和轻弹关闭。

虽然它需要AFNetworking(用于从 URL 加载更大的图像),但您可以注释掉一些代码(大约 10 行)来删除这种依赖关系。如果有人需要,我可以发布我的无 AFNetworking 版本。让我知道 :)

于 2015-05-07T04:42:11.537 回答
1

一种可能的实现是使用具有UIModalPresentationFullScreen表示样式的模态视图控制器。

于 2012-09-18T17:11:50.020 回答
0

刚刚快速完成了一个版本,只需下载并添加到您的项目中:

GSSimpleImageView.swift

和用法:

let imageView = GSSimpleImageView(frame: CGRectMake(20, 100, 200, 200))
imageView.image = UIImage(named: "test2.png")
self.view.addSubview(imageView)
于 2016-01-16T07:24:41.053 回答