SwiftUI + Combine Weather

Showing Weather forecast using SwiftUI + Combine.framework.

Select a area, and show daily forecasts, using OpenWeather API

Highlight of this app

• SwiftUI.framework
• Combine.framework
  • used in network-access and state - manegemnt
• Clean Architecture
  • View - ViewModel - Repository
• NetworkImageView
• MKMapView with CoreLocation
  • GPS with Combine.framework
  • detect tap and add pin at tap position
• Sample implementation of MainThreadScheduler
  • but, this won't work with delay-call.
• Adapt dark mode with asset-catalog-colors

how to run

• Install Xcode11.0 beta
  • you need not install MacBeta (but you can't use preview)
• Build and Run

By default, this app will access local-json file.
If you want to use network-api, please do as following

• sign in OpenWeather and create Api Key
• rename Config-sample.plist to Config.plist
• Write your Api Key in Constants.plist

city_list.json from Openweather is too big (20MB!). So I shrinked it. Please check city_json/

file structure

• /
  +- Config-sample.plist : config base file. rename and set your key +- RootView.swift : view at app-launching
  +- Theme.swift : Color list
  +- asset/ : cities and sample json
  +- Entity/
  +- Network/
  +- PartsView/ : common views
  +- Repository/
  +- Utils/
  +- View
  += ViewModel

app structure

• Use Clean Architecture,
• avoid using @State in view.(except TextField, it requires state)
• use ViewModel for view state management.
• use Repository for fetching data

Basic Structure

Fragment - View - ViewModel - Repository

• Fragment
  • create ViewModel and put it to the environment.
  • create View with ViewModel
  • manage lifecycle-related-operation
• View
  • render view, created by Fragment
  • bind with ViewModel and call its functions.
• ViewModel
  • Manage View-State
  • BindableObject
• Repostiroy
  • Fetch data

thanks

• OpenWeather
• Many repositories using SwiftUI and authors.

Known issues

• MainThreadScheduler won't work with delay-time
  • when I call action() an DispatchQueue.main.async, nothing happens.
• Weather5DayView causes memory-leaks
  • I found that List causes it. But I can't find the way to fix this.