FlexTimer

Miles Alden - June 14th, 2021

for Flex

Hello Flex Team!

My initial approach was to create this timer with an eye towards an MVVM architecture. This could pretty simply be done in SwiftUI, but since SwiftUI has a deployment target of iOS 13 I thought it might be nicer to include users from earlier OS' & devices. This project has three major components:

• FlexTimer, our own rolled timer functionally similar to Timer (aka, NSTimer) which leverages RunLoops but gives us more control over pausing, starting, stopping, incremental callouts and completion callouts.
• QuartzCore, using CAShapeLayers to draw our paths, CABasicAnimations to interpolate between keyframe states, CAMediaTiming to allow for pause/resume a layer's animations. This is preferable to using only drawRect and maintaining animation and interpolation between values and states.
• UIKit, using UIView as a parent class, we're able to bind together our color selection, gesture recognizers, quartz layers, timing duration & timer-states/animation-states.

I've always been a fan of community components that have very little runway or user configuration and that was the intent here.

This FlexTimerView only needs to be added to a superview to immediately function and provides an optional onChange callback for external objects to respond to.

Please view the /docs folder with a browser to see our docs generated by jazzy using:

Ref: https://github.com/realm/jazzy
$ jazzy \
 --clean \
 --author "Miles Alden" \
 --github_url https://github.com/Fritoo/FlexTimer \
 --output docs/ \
 --min-acl internal