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Delay inside a for loop

Hello there, probably the most of all API providers doesn’t let you get as many as data per minute as you would like. I payed for 100 calls / minute.

How can I delay in a for loop, so when the variable i is a multiple of 100, the for loops stops for 60 SECONDS, and then continue…

static func putStockData_Intraday_InApp() {

for i in Constants.stockSymbol.indices {

        getStockData_Daily(time: Constants.functionDailyAdjusted, symbol: Constants.stockSymbol[i], output_size: "compact")



// if i is a multiple of 100, stop the for loop, execute getStockData_Daily for each i, wait a minute, repeat until i hits the last indices.

– i represents a stock symbol, for example: MSFT
– Constants.stockSymbol is an array of strings with all the stock symbols I want to publish
– getStockData_Daily() is a function which, for a stock Symbol, (MSFT) get the some data from the api provider regarding this stock, and post it to firebase.

Thank you in advance!

I don’t know if this is useful for your situation or not, but one possibility.

Timer.scheduledTimer(timeInterval: 3, target: self, selector: #selector(ViewController.hello), userInfo: nil, repeats: false)
   @objc func hello() {
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I found these examples on the web somewhere a while back.

func functionOne() {
   let delayTime = DispatchTime.now() + 3.0
   DispatchQueue.main.asyncAfter(deadline: delayTime, execute: {

func hello() {
} functionOne()
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Yes both of those are ways to create a delay but why would you make an API call inside a loop??

If you create a timer you’re going to lock up the UI (or the app) and the user will be confused why your app stopped responding

Is a separated app from the main app. This app just gets and posts data, the single view element is Text(“Hello!”) that’s it.

I don’t really want to use a for loop and making inside api calls, but do you know any better method to make 7000 api calls with 100 calls/minute limit, automatically and not manually?

Why do you need to make 7000 API calls?

Because I get all stock data and most of the crypto

All stock data, how is this designed?

A user has included 7000 stocks to view?

You shouldn’t really ever need to make 7,000 API calls all at once