1169998 - Tap status bar to quick scroll to top doesn't work intermittently.

Status: RESOLVED FIXED

(Firefox for iOS :: Browser, defect)

Description

[Alex Gibson [:agibson]]

Build 19:

I think this may be a regression. Pretty sure it might have worked before, but filing anyway as I use this feature regularly for browsing :(

STR:

1.) In portrait mode on an iPhone, open any web page in Firefox for iOS.
2.) Scroll down the page
3.) Tap the status bar to quick scroll back to the top of the web page.

Expected results:

The page is scrolled back to the top.

Actual results:

Nothing happens.

Comment 1

[Alex Gibson [:agibson]]

Hmm… this seems to be totally intermittent. At first it wasn't working for any tabs / web pages. Now it suddenly started working again. Something odd, but will see if it happens again.

Comment 2

[Alex Gibson [:agibson]]

And now it's stopped working again :/

Comment 3

[Aaron Train [:aaronmt]]

Do you have an example page where this happens?

Comment 4

[Alex Gibson [:agibson]]

It doesn't seem to be tied to any given URL unfortunately. I'm trying to work out a pattern, but it seems to randomly stop working and then start again.

Comment 5

[Emily Toop (:fluffyemily)]

bah! 
```This gesture works on a single visible scroll view; if there are multiple scroll views (for example, a date picker) with this property set, or if the delegate returns NO in scrollViewShouldScrollToTop:, UIScrollView ignores the request. After the scroll view scrolls to the top of the content view, it sends the delegate a scrollViewDidScrollToTop: message.```

Comment 6

[Emily Toop (:fluffyemily)]

Attachment: Pull request

Comment 7

[Brian Nicholson (:bnicholson)]

Comment on attachment 8615270 [details] [review]
Pull request

r=me with a few comments in the PR.