UIWebView 中的 Javascript 回调到 C/Objective-C [英] Javascript in UIWebView callback to C/Objective-C

问题描述

当在 UIWebView 中检测到某个事件时，有没有办法让 Objective-c 回调?Javascript 可以向 Objective-C 发送回调吗?

Is there a way to get a callback to objective-c when a certain event has been detected in a UIWebView? Can Javascript send a callback to Objective-C?

推荐答案

更新 - 不再使用 UIWebView.使用 WKWebView，或者更好的(如果它满足您的需求并且您正在为 iOS 9 构建)，一个 Safari 视图控制器.

Update - don't use UIWebView anymore. Use WKWebView, or better yet (if it fits your needs and you're building for iOS 9), a Safari View Controller.

但如果您必须使用 UIWebView，请在您的 UIWebView 委托中提供 webView:shouldStartLoadWithRequest:navigationType:

But if you must use UIWebView, in your UIWebView delegate, provide an implementation for webView:shouldStartLoadWithRequest:navigationType:

在您的 HTML 或 Javascript 文件中，添加将 URL 发送到自定义方案的函数(出于可读性目的，不需要自定义方案).发送的所有 URL 都会传递给您的 Objective-C 方法实现，然后您就可以为所欲为.

In your HTML or Javascript files, add functions that send URLs to a custom scheme (for readability purposes, the custom scheme isn't required). All the URLs sent will be passed to your Objective-C method implementation, and then you can do what you'd like.

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