support iOS 13.1

Support Xcode 11 beta 5

update readme

change userdata to ObservableObject

fix aspect ratio bug

update setting tab

update to support xcode 11 beta 4

remove user key

Merge branch 'master' of https://github.com/LASER-Yi/SwiftUI-APOD

change file structure change async image attribute

Change to MIT LICENSE

replace with new ui introduction

replace video text to sf symbol

add timer to let load button rotate

change file structure & change async image to feedback error