将Objective-C的异常提升到Javascript

问题描述

JavascriptCore允许我们通过JSExport协议将我们的Objective-C类暴露给javascript。假设在一个暴露的Objective-C类的方法中，遇到引发异常有意义的条件。有没有办法创建所述异常并提高它，以便JavaScript代码可以处理它，因为它会处理一个常规的JavaScript异常？

我试着做一个常规的旧的 [NSException raise ...] ，并立即导致崩溃。 p>

我被降级为检测提升条件，将该条件恢复为javascript，并让JavaScript执行抛出？

解决方案

Objective-C JSContext 对象具有异常属性，可用于向JavaScript抛出异常。根据头文件中的注释：

JavascriptCore permits us to expose our Objective-C classes to javascript via the JSExport protocol. Let's say, in one of the exposed Objective-C class's methods, a condition is encountered where it makes sense to raise an exception. Is there a way to create said exception and raise it such that the javascript code can process it as it would process a regular javascript exception?

I tried doing a regular old [NSException raise...] and that immediately caused a crash.

Am I relegated to detecting the raise condition, passing that condition back to javascript, and having the javascript do the throw?

解决方案

Objective-C JSContext object have exception property, that may be used to throw an exception to JavaScript. According comments in header file:

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