SwiftYFinance

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Refactored v3.0.0 with Swift concurrency support is coming!

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Requirements

I used Swift 5.0 and backward compatibility is not guranteed. IOS 13+

Installation

SwiftYFinance is available through Swift Package Manager.

Add dependency to your Package file:

dependencies: [
    .package(url: "https://github.com/AlexRoar/SwiftYFinance", .upToNextMajor(from: "1.4.0")),
]

Or add dependency to your XCode project: File > Swift Packages > Add Package Dependency

https://github.com/AlexRoar/SwiftYFinance

Basic Usage

Search

/*
* Main class of SwiftYFinance. Asynchronous method's callback always will
* have format: (Some Data?, Error?). If error is non-nil, then data is going to be nil.
* Review Error description to find out what's wrong.
* Synchronous API is also provided. The only difference is that it blocks the thread and
* returns data rather than passing it to the callback.
*/
import SwiftYFinance

// Searches quote in Yahoo finances and returns found results
SwiftYFinance.fetchSearchDataBy(searchTerm:"AAPL", quotesCount=20) {
    data, error in
    /*
    callback: ([YFQuoteSearchResult]?, Error?) -> Void
    struct YFQuoteSearchResult{
        var symbol: String?
        var shortname: String?
        var longname: String?
        var exchange: String?
        var assetType: String?
    }
    */
    if error == nil{
        return 
    }
    print(data!.longname ?? "No long name")
}

The same thing but synchronously:

let (data, error) = SwiftYFinance.syncFetchSearchDataBy(searchTerm:"AAPL", quotesCount=20)
if error == nil{
    return 
}
print(data!.longname ?? "No long name")

Even though executing commands in the main thread synchronously is not the best practice, I added this feature to the project. It’s on your account to write fast, non-freezing apps, so use synchronous methods wisely.

Search for news is also awailable through fetchSearchDataBy(searchNews:String, ...)

Basic recent data

Fetches the most recent data about identifier collecting basic information.

SwiftYFinance.recentDataBy(identifier:"AAPL"){
    data, error in
    /*
    data ~>
    struct RecentStockData{
        var currency: String?
        var symbol: String?
        var exchangeName: String?
        var instrumentType: String?
        var firstTradeDate: Int?
        var regularMarketTime: Int?
        var gmtoffset: Int?
        var timezone: String?
        var exchangeTimezoneName: String?
        var regularMarketPrice: Float?
        var chartPreviousClose: Float?
        var previousClose: Float?
        var scale: Int?
        var priceHint: Int?
    }
    */
    if error == nil{
        return 
    }
    print(data!.regularMarketPrice ?? "No regularMarketPrice")
}

Chart data

Fetches chart data points

SwiftYFinance.chartDataBy(
        identifier:"AAPL",
        start: Date(...),
        end: Date(...),
        interval = .oneday){
    data, error in
    /*
    data ~>[
        struct StockChartData{
            var date: Date?
            var volume: Int?
            var open: Float?
            var close: Float?
            var adjclose: Float?
            var low: Float?
            var high: Float?
        }
    ]
    */
    if error == nil{
        return 
    }
    print(data![0]?.open ?? "Open price is unavailable")
}

Chart data at moment

Sometimes, you need to fetch data at some moment in the past. Use chartDataBy(..., moment: Date, ...) for that.

SwiftYFinance.chartDataBy(
        identifier:"AAPL",
        moment: Date(...),
        futureMargin: TimeInterval(...)
        ){
    data, error in
    /*
    data ~>[
        struct StockChartData{
            var date: Date?
            var volume: Int?
            var open: Float?
            var close: Float?
            var adjclose: Float?
            var low: Float?
            var high: Float?
        }
    ]
    */
    if error == nil{
        return 
    }
    print(data![0]?.open ?? "Open price is unavailable")
}

Identifier Summary

This part of API is MASSIVE. Yahoo Finance has a lot of summary modules and I implemented several of them. Still, you can fetch data from raw JSON parameter.

I will add new modules with every version. Currently, only essential modules are implemented.

Module	Support	Module	Support
calendarEvents	✅	recommendationTrend	✅
summaryProfile	✅	quoteType	✅
industryTrend	✅	price	✅
summaryDetail	✅	incomeStatementHistoryQuarterly
assetProfile		balanceSheetHistoryQuarterly
incomeStatementHistory		cashFlowStatementHistory
balanceSheetHistory		cashFlowStatementHistoryQuarterly
financialData		secFilings
upgradeDowngradeHistory		institutionOwnership
fundOwnership		majorDirectHolders
majorHoldersBreakdown		insiderTransactions
insiderHolders		netSharePurchaseActivity
sectorTrend		earnings
companyOfficers		earningsHistory
earningsTrend		indexTrend
symbol		fundProfile
topHoldings		fundPerformance
defaultKeyStatistics

You can fetch modules by calling summaryDataBy(...)

SwiftYFinance.summaryDataBy(identifier: "AAPL", selection = .all){
data, error in
    if error != nil{
        return
    }
    print(data)
    /*
    data ~>
    struct IdentifierSummary {
        var recommendationTrend:RecommendationTrend?
        var summaryProfile:SummaryProfile?
        var quoteType:QuoteType?
        var price:Price?
        var indexTrend:IndexTrend?
        var calendarEvents:CalendarEvents?
        var summaryDetail:SummaryDetail?
        var dataStorage:JSON?
    }
    */

    // Raw JSON:
    print(data.dataStorage)
}

Several types of selection are available. .all will fetch every method, even not supported yet so that you can get data from raw JSON. You can select .supported, then only supported data will be fetched. Also, you can specify specific module (ex: .price) or list of modules (ex: [.price, .summaryDetail])

Author

Aleksandr Dremov, dremov.me@gmail.com

License

SwiftYFinance is available under the MIT license. See the LICENSE file for more info.