CryptoApp-SwiftBootcamp

2022/2/16 —— 2022/4/10

CryptoApp: A Swift Learning Demo

This app was make by following a @SwiftfulThinking course on YouTube. It use MVVM Architecture, Combine, and CoreData! The cryptocurrency data that is used this app comes from a free API from CoinGecko.

This app was developed by Nick Sarno. It uses SwiftUI and is written 100% in Swift The project benefits from multi-threading, publishers/subscibers, and data psersistance.

Tutorial url: https://www.youtube.com/watch?v=TTYKL6CfbSs&list=PLwvDm4Vfkdphbc3bgy_LpLRQ9DDfFGcFu

主要的View

HomeView

allCoinList数据的获取
按照价格、id对coin进行排序
数据刷新

搜索框及其逻辑处理

 func filterCoins(text:String, coins:[CoinModel])->[CoinModel]{
        guard !text.isEmpty else {
            return coins
        }
        
        let lowercasedText = text.lowercased()
        
        return coins.filter { coin in
            return coin.symbol.lowercased().contains(lowercasedText)  ||
            coin.id.lowercased().contains(lowercasedText) ||
            coin.name.lowercased().contains(lowercasedText)
        }
    }

portfolioCoin的增删改查
allCoinList到portfolioCoin的切换

DetailView

折线图表

LaunchView

其他技术

Network Manager

使用Combine构建一个通用的网络请求函数

   static func download(url:URL)->AnyPublisher<Data, Error>{
        URLSession.shared.dataTaskPublisher(for: url)
            .subscribe(on: DispatchQueue.global(qos: .background))
            .tryMap({ try handleResponse(output: $0, url: url) })
            .receive(on: DispatchQueue.main)
            .eraseToAnyPublisher()
    }

LocalFileManager

使用FileManager实现对图片资源持久化存储，以及增删改查

HapticManager

UINotificationFeedbackGenerator() 震动反馈

最佳实践

extension Color

统一全局的颜色，方便修改和扩展。

extension Color{
    static let theme = ColorTheme()
}

struct ColorTheme{
    let secondaryText = Color("SecondaryTextColor")
    let red = Color("RedColor")
    let accent = Color("AccentColor")
    let green = Color("GreenColor")
    let background = Color("BackgroundColor")
}

extension PreviewProvider

方便为canvas的预览提供数据

SwiftUI及动画

排序

enum SortOption{
        case coin,coinReverse,price,priceReverse,holding,holdingReverse
}

TD21forever/CryptoApp-SwiftBootcamp