Posts
All the articles I've posted.
iOS push is not one kind of notification: from alerts to communication notifications, image attachments, and Live Activities
From APNs accepting a request, through a Notification Service Extension rewriting content, to iOS deciding how it appears. Alert, silent push, image attachment, communication notification, in-notification reply, time-sensitive, and Live Activity — the mechanisms and when to use them.
Dual Range Slider: Crossing sides is really just recomputing roles each frame
A walk through the dual-range slider on this site. The finger drags one scalar; the other end freezes as an anchor. lower / upper are not handle identities — they are roles assigned every frame.
VAPKit: Transparent gift animations are two samples from the same frame
A walk through the VAPKit source. H.264 cannot carry Alpha, so VAP paints grayscale transparency into the same image. The player reads vapc, decodes with AVAssetReader, and composites rgbFrame / aFrame in Metal.
NestedPaging: Nested scrolling on a profile page is really just locking contentOffset
A walk through the NestedPaging source. The outer table and child lists both recognize the same vertical gesture; who actually scrolls is decided by offset locking. Header visibility is the only source of truth.