Iterate through different view with array, Swift

Question

I have 4 different progressView

@IBOutlet weak var firstProgressBar: UIProgressView!
@IBOutlet weak var secondProgressBar: UIProgressView!
@IBOutlet weak var thirdProgressBar: UIProgressView!
@IBOutlet weak var fourthProgressBar: UIProgressView!

And I have an array with 4 values

[30,20,24,25]

Since this array change from the API call (I need to check if I really have this value), what is the best and safer way to:

Order this array from bigger to smaller
Iterate throught this array and set each of my progressView value to the corresponding array value

This is my current code:

func setupProgressBar(item: CustomObject) {
   let array = item.array // [x,y,z,w] array 

   self.progressBar.setProgress( ?? , animated: false)
}

I have an animation for the value but it's not the point of my question, i just need to set values

Which progress bar should get which array value? Also, what do you mean by the "best way"? Can you define that? — Sweeper
– Sweeper, Commented Jul 3, 2020 at 11:54
First progress bar => First array value ; Second progress bar => Second array value and so on — jamesCode
– jamesCode, Commented Jul 3, 2020 at 11:55
With "Best way" I mean without setting one by one, and by doing it in a safe way (no crash cuz I don't have value for example) — jamesCode
– jamesCode, Commented Jul 3, 2020 at 11:56

Frankenstein · Accepted Answer · 2020-07-03 12:20:31Z

3

A better approach would be to connect all the UIProgressBar in your storyboard to an @IBOutlet collection.

@IBOutlet weak var progressBars: [UIProgressView]!

Then iterate through the array to set the value of progressBars.

func setupProgressBar(item: CustomObject) {
    let array = item.array // [x,y,z,w] array
    for (progressBar, value) in zip(progressBars, array) {
        progressBar.setProgress(value, animated: false)
    }
}

edited Jul 3, 2020 at 12:20

answered Jul 3, 2020 at 11:57

Frankenstein

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5 Comments

jamesCode Over a year ago

That's interesting, I didnt think about this! Could you add some specific code for my example? Let's say I have to add this 4 array values to this collection of ProgressBar

Frankenstein Over a year ago

I've already added the modified setupProgressBar method as an example.

Mubashir Ali Over a year ago

@Frankenstein question: what will happen if the count of progressBars and item.array are not equal? Will it crash?

jamesCode Over a year ago

That's a good point, I can try this out if @Frankenstein couldnt' help us! Btw thank you very much, I learned 2 new stuff!

Frankenstein Over a year ago

@MubashirAli It doesn't crash for that scenario. It's Safer!

Mubashir Ali · Accepted Answer · 2020-07-03 12:00:41Z

2

func setupProgressBar(item: CustomObject) {
    let valueArray = item.array.sorted  // [x,y,z,w] array
    let progressBars = [firstProgressBar, second….., fourthProgressBar]
    for item in valueArray.enumerated() {
        progressBars[item.index].setProgress(item.value)
    }
}

Make sure that progress bars and values are equal. Otherwise the code will crash.

answered Jul 3, 2020 at 12:00

Mubashir Ali

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