如何在 iPhone 上的 UIWebview 中清除后退列表? [英] How to clear back forward list in UIWebview on iPhone?

问题描述

我想访问/清除后退列表，就好像 UIWebView 又是新的一样.是否有任何公共 API 或解决方法可以做到这一点?

I want to access/clear the back forward list as if the UIWebView is new again. Is there any public API or workaround to do this?

我试过了:

while ([webview canGoback]) {
    [webview goBack];
}

但这会冻结设备(模拟器也是).

but that will freeze the device (simulator too).

推荐答案

免责声明
与任何类似的事情一样，请记住，结果可能无法通过应用商店的批准，并且可能根本不适用于 SDK 的未来修订版.

SDK 中没有官方 方法可以做到这一点.但是，如果您真的想清除 UIWebView 的后退/前进历史记录，可以通过深入研究私有框架来完成.

There is no official method for doing this in the SDK. However if you really want to clear the back/forward history of a UIWebView it can be done with a little delve into the private frameworks.

一个快速而肮脏的方法(完成一堆丑陋的编译器警告)如下:

A quick and dirty way to do it (complete with a bunch of ugly compiler warnings) is as follows:

鉴于 myUIWebViewInstance 是一个完全正常的 UIWebView 实例:

Given that myUIWebViewInstance is a perfectly normal instance of UIWebView:

id internalWebView=[[myUIWebViewInstance _documentView] webView];       
[internalWebView setMaintainsBackForwardList:NO];
[internalWebView setMaintainsBackForwardList:YES];

框架中还有一个比较诱人的_clearBackForwardCache方法，不过在tick的时候好像没什么作用.只是翻转布尔值对我来说是一种享受.

There is also the rather tempting _clearBackForwardCache method in the framework, however it didn't seem to do much when tickled. Just flipping the boolian worked a treat for me.

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