iOS 7 javascript XMLHttpRequest bug

Question

This post is half question - half announcement.. i develop iOS applications which include UIWebView that performs javascript code. When i run the app on devices with the newly

Answer 1

The UIWebview does not allow synchronous XHRs in IOS7.

This is one of the frustrating differences between the WebView and Safari (which does allow them).

The workaround:

1. Create an Objective-C function that makes a synchronous HTTP request.

2. Call that function from JavaScript. (This happens synchronously.)

Of course, if you wanted any benefits like caching, you would have to implement that yourself.

It's a bit baffling why Apple would think requiring that workaround is a good idea.