如何检测UIWebView是否缩放？(How can I detect whether a UIWebView is zooming?)

如何检测UIWebView是否缩放？(How can I detect whether a UIWebView is zooming?)

每一个：

我可以通过将scalesPageToFit设置为YES来启用缩放。 但是，我怎么知道UIWebView是否正在缩放？

有谁知道吗？

提前致谢。

every one:

I can enable zooming by setting scalesPageToFit to YES. But, how can I know whether UIWebView is zooming?

Does anyone know that?

Thanks in advance.

最满意答案

解决。

向XXXViewController添加新属性以存储当前缩放比例（与初始比例相比）

@property (nonatomic, assign) float zoomScale;

在某个适当的位置设置zoomScale的初始值（例如viewDidLoad？）

self.zoomScale = 1.0f;

更改ScrollView的比例时更新缩放比例（UIWebView的ScrollView）

- (void)scrollViewDidEndZooming:(UIScrollView *)scrollView withView:(UIView *)view atScale:(float)scale{ self.zoomScale *= scale; }

如果zoomScale在一定范围内（几乎为1.0），则WebView不会缩放

if(self.zoomScale - 1.0 < 0.001 && self.zoomScale - 1.0 > - 0.001) { // Not zooming }

而且，如果你想改变规模，你应该

- (void)changeWebViewScale:(float)scale { [self.webView.scrollView setZoomScale:scale / self.zoomScale animated:YES]; }

Resolved.

add a new property to XXXViewController to store current zoom scale (compared to initial scale)

@property (nonatomic, assign) float zoomScale;

set initial value of zoomScale at some proper place (e.g. viewDidLoad?)

self.zoomScale = 1.0f;

update zoom scale when the scale of ScrollView is changed (the ScrollView of UIWebView)

- (void)scrollViewDidEndZooming:(UIScrollView *)scrollView withView:(UIView *)view atScale:(float)scale{ self.zoomScale *= scale; }

if zoomScale is within certain range (almost 1.0), the WebView is not zooming

if(self.zoomScale - 1.0 < 0.001 && self.zoomScale - 1.0 > - 0.001) { // Not zooming }

And, if you want to change the scale, you should

- (void)changeWebViewScale:(float)scale { [self.webView.scrollView setZoomScale:scale / self.zoomScale animated:YES]; }