Allow setting deceleration rate for WKWebView's scrollView to NORMAL without decreasing rendering performance

Originator:stephanleroux
Number:rdar://21423811 Date Originated:June 17, 2015
Status:Open Resolved:
Product:iOS Product Version:8.3
Classification:Enhancement Reproducible:Yes
 
Summary:
Currently we only have the option to set the deceleration rate of UIScrollViews to NORMAL or FAST. In the case of a WKWebView, changing the deceleration rate to NORMAL causes rendering issues when scrollling too fast down the page. Ideally we would like to be able to change the deceleration rate to NORMAL and avoid the tiling issues we're seeing.

Steps to Reproduce:
1. Set deceleration rate of WKWebView's scrollView to NORMAL
2. Load app onto iPad Air, displaying the WKWebView.
3. Load a long content page
4. Scroll really fast down the page.
5. Notice grey/tiling rendering issues in the webview

Expected Results:
WKWebView should display web content

Actual Results:
WKWebView displays grey where web content should be and doesn't render in a timely manner

Version:
iOS 8.3

Notes:


Configuration:
iPad Air (Wifi)

Comments


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