問題描述

我正在使用情節提要 (iOS 6.0) 為我的應用創建照片庫查看器.這就是我的 imageViewController 在情節提要中的設置方式:

I'm using storyboard (iOS 6.0) to create a photo gallery viewer for my app. This is how my imageViewController is set up in storyboard:

我已確保在 imageView 和 scrollView 上啟用 userInteraction 和多次觸摸.我想要做的是，在捏我想放大 imageView(最大比例 3)并能夠平移.這是我目前擁有的，但是，即使檢測到捏合手勢，比例也不會改變.

I've made sure to enable userInteraction and multiple touches on both the imageView and scrollView. What I want to do is, on pinch I want to zoom into the imageView (maximum scale 3) and be able to pan around. This is what I currently have, however, even though the pinch gesture is detected the scale does not change.

- (IBAction)imagePinched:(id)sender {

if (pinchRecognizer.state == UIGestureRecognizerStateEnded || pinchRecognizer.state == UIGestureRecognizerStateChanged) {

    NSLog(@"gesture.scale = %f", pinchRecognizer.scale);

    CGFloat currentScale = self.fullScreenView.frame.size.width / self.fullScreenView.bounds.size.width;
    CGFloat newScale = currentScale * pinchRecognizer.scale;

    if (newScale < 1) {
        newScale = 1;
    }
    if (newScale > 3) {
        newScale = 3;
    }

    CGAffineTransform transform = CGAffineTransformMakeScale(newScale, newScale);
        self.fullScreenView.transform = transform;
        pinchRecognizer.scale = 1;
    }

}

大多數在線問題和教程都涉及以編程方式創建視圖并執行此操作，但代碼越少越好(在我看來).讓它與故事板一起使用的最佳方法是什么?提前謝謝！！！

Most questions and tutorials online deal with programmatically creating the views and doing this, but the less code the better (in my eyes). What's the best way to get this to work with storyboard? Thank you in advance!!!

更新:

這是我完整的 .m 文件代碼:

Here is my full .m file code:

- (void)viewDidLoad
{
    [super viewDidLoad];

    //Assign an image to this controller's imageView
    fullScreenView.image = [UIImage imageNamed:imageString];

    //Allows single and double tap to work
    [singleTapRecognizer requireGestureRecognizerToFail: doubleTapRecognizer];
}

- (IBAction)imageTapped:(id)sender {

    NSLog(@"Image Tapped.");

    //On tap, fade out viewController like the twitter.app
    [self dismissViewControllerAnimated:YES completion:nil];
}

- (IBAction)imageDoubleTapped:(id)sender {

    NSLog(@"Image Double Tapped.");

    //On double tap zoom into imageView to fill in the screen.
    [fullScreenView setContentMode:UIViewContentModeScaleAspectFill];
}

- (IBAction)imagePinched:(id)sender {

    if (pinchRecognizer.state == UIGestureRecognizerStateEnded || pinchRecognizer.state == UIGestureRecognizerStateChanged) {

        NSLog(@"gesture.scale = %f", pinchRecognizer.scale);

        CGFloat currentScale = self.fullScreenView.frame.size.width / self.fullScreenView.bounds.size.width;
        CGFloat newScale = currentScale * pinchRecognizer.scale;

        if (newScale < 1) {
            newScale = 1;
        }
        if (newScale > 3) {
            newScale = 3;
        }

        CGAffineTransform transform = CGAffineTransformMakeScale(newScale, newScale);
        self.fullScreenView.transform = transform;
        pinchRecognizer.scale = 1;
    }
}

- (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView
{
    return self.fullScreenView;
}


-(void)scrollViewDidEndZooming:(UIScrollView *)scrollView withView:(UIView *)view atScale:(float)scale {

}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end

推薦答案

我認為 Apple 文檔中有更好的解決方案

I think better solution in Apple Documentation

- (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView

{

    return self.imageView;

}
- (void)viewDidLoad {

    [super viewDidLoad];

    self.scrollView.minimumZoomScale=0.5;

    self.scrollView.maximumZoomScale=6.0;

    self.scrollView.contentSize=CGSizeMake(1280, 960);

    self.scrollView.delegate=self;

}

查看 Apple 文檔

這篇關于在滾動視圖內的 UIImageView 上捏縮放效果?的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網！