UIWebView 缩放不超过 x2

Question

在 UIWebView 中缩放有很多问题，但我找不到答案。

我有 ViewController 和 WebView。我将一个 SVG 文件加载到此 WebView 中，并且我想通过点击它来放大。代码如下：

@interface ViewController : UIViewController <UIGestureRecognizerDelegate>
{
    IBOutlet MyWebView *webView;
    UITapGestureRecognizer *doubleTapRecognizer;
    CGFloat k;
}

...

- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.

[webView loadRequest:[NSURLRequest requestWithURL:[[NSBundle mainBundle] URLForResource:@"map" withExtension:@"svg"]]];
webView.scalesPageToFit = YES;

webView.scrollView.maximumZoomScale = 512;
webView.scrollView.minimumZoomScale = 0.1;

doubleTapRecognizer.numberOfTapsRequired = 2;
doubleTapRecognizer.numberOfTouchesRequired = 1;

doubleTapRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(doubleTap:)];
doubleTapRecognizer.delegate = self;
doubleTapRecognizer.enabled = YES;
[webView addGestureRecognizer:doubleTapRecognizer];

k = 1;
}

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer {
    return YES;
}

- (void)doubleTap:(UITapGestureRecognizer*)sender
{
    if (sender.state == UIGestureRecognizerStateEnded)
    {
        k = 10;
// No one does not work correctly
        [webView.scrollView setZoomScale:k animated:YES];
//      [webView setContentScaleFactor:k];
//      [webView.scrollView setContentScaleFactor:k];
//      webView.scrollView.zoomScale = k;
//      [webView.scrollView zoomToRect:CGRectMake(webView.bounds.origin.x, webView.bounds.origin.y, webView.bounds.size.width/k,  webView.bounds.size.height/k) animated:YES];
    }
}

现在 WebView 通过点击放大，但只能放大 2 倍，不再放大。出了什么问题，我怎样才能将其放大 10 倍？

Answer 1

你试过捏吗？

这并不是因为您将最大缩放设置为 512 或 10，点击两次就会缩放到该级别，这意味着点击网页视图中的一个小元素，这将放大以填充网页的可用空间视图，无论缩放值如何，直到最大缩放值。

因此，看起来占据一半屏幕的东西将使缩放变为 2 倍，越小则越大。