iOS 15 UIPickerView Delay on Start of Scrolling?

Question

Kim Ju Young OP

Created Jul ’21

Replies 2

Boosts 0

Views 1.1k

Participants 2

We are testing an app currently on sale on iOS 15.

When I start scrolling up and down by touch in a UIPickerView , the scrolling is not smooth. There is a short break when you start scrolling. If I flick it quickly, it stops and after a while it has already scrolled to where some data has advanced.

If we start scrolling and keep scrolling, then we don't have the above symptoms.

The above symptoms start after the app does a big operation while loading a file. That is, when the symptom starts, it is there in the UIPickerView throughout the app.

Only UIPickerView scrolling, other screen transitions or UITableView scrolling do not show such symptoms.

There is no such symptom until iOS 14.

Could you give us some advice on the cause of the above symptoms or how to improve it? The device tested is an iPhone 8 plus.

We did send feedback to Apple through the Feedback app on devices that currently have iOS 15 installed.

Boost

Answer 1

Ziwaka OP

Oct ’21

I have the same problem too..

0

Answer 2

Kim Ju Young OP

Oct ’21

We asked Apple for improvement by sending the code that reproduced the symptom as feedback, but unfortunately Apple was unable to reproduce or improve it in the end.

We found a way to get rid of the symptoms and were able to make improvements before the official release of iOS 15.

We found that MPVolumeView was the cause.

If you use MPVolumeView in your app, try changing the location of the MPVolumeView declaration or its location.

0