Pull Down to Update

[iJohnwickham]

I have a tab bar app with a UIWebView in both tabs. One displaying Facebook, the other Twitter. I want to add the 'Pull Down to Update' feature, as seen in the Facebook app. Pull all the way down, the page reloads.

How can I add this to the UIWebView?

[maddogsoftware]

Originally Posted by iJohnwickham

I have a tab bar app with a UIWebView in both tabs. One displaying Facebook, the other Twitter. I want to add the 'Pull Down to Update' feature, as seen in the Facebook app. Pull all the way down, the page reloads.

How can I add this to the UIWebView?

There's some great resources showing how to implement Pull to Update (or refresh) when using a tableView:
(this one springs to mind iPhone Pull to Refresh - Leah Culver's Blog)
but you're going to have to adapt them in order to work with UIWebView.

The basic technique used to implement this functionality usually seems to be:
1. Add a view with the "Pull to Refresh" message and details to a UIScrollview (or subclass) and set it's frame so that it is above the top of your UIScrollview.
2. Connect a delegate to the UIScrollview and listen for the scrollViewDidScroll messages.
3. When you receive a message that the view been scrolled far enough upwards you can perform any update processing you need and reload the subviews.

I realise this is all pretty high level but it might be enough to get you started.

If you're still figuring things out I'd suggest getting the example from the page I linked, understanding it a little then trying to implement your own in order of the steps described above... hopefully I didn't miss anything.

[iJohnwickham]

Originally Posted by maddogsoftware

[url=http://blog.leahculver.com/2010/12/iphone-pull-to-refresh.html]

I used this resource ^ and found it helpful, however, it tells you to 'link against the QuartzCore framework. I don't understand this... What is the QuartzCore Framework, how do I link it, what do I link it to, where, and how!?!

[moezzz]

Originally Posted by iJohnwickham

I used this resource ^ and found it helpful, however, it tells you to 'link against the QuartzCore framework. I don't understand this... What is the QuartzCore Framework, how do I link it, what do I link it to, where, and how!?!

Go to Framework folder and right-click.. then add existing Framework.. choose QuartzCore.Framework

And compile.




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[mcreisi]

Hi,

Did you find a way to make pull to refresh work on a webview?
It would be great if you have a tutorial for me.
I also have an tabbar controller with 3 tabs. each of them having a webview.

thank you and best regards,
Roman