CODEWITHSUNDEEP
iosswift3
jessica mele
jessica mele

Reputation: 415

join array items into one string for a label in swift 3

In my app I have an array coming back from an API and currently it is creating a new label for each item and stacking them one on top of another. I would like it to create one label where the array items are in string separated by a bullet. Here is my current working code: 

lblLeft.text = ""

if let expertiseCount = helper.expertise {
    for i in 0..<expertiseCount.count {
        if i >= 0 {
            print(expertiseCount[i].name!)
            let paragraphStyle = NSMutableParagraphStyle()
            paragraphStyle.lineSpacing = 10
            let attrString = NSMutableAttributedString(string: lblLeft.text! + "\(expertiseCount[i].name ?? "")\n")
            attrString.addAttribute(NSParagraphStyleAttributeName, value:paragraphStyle, range: NSMakeRange(0, attrString.length))
            lblLeft.attributedText = attrString        
        }
    }
}

currently looks like the image on the left, I want it to look like the image on the right.enter image description here

Upvotes: 2

Views: 1843

Answers (4)

MALIKK HABIB UR REHMAN
MALIKK HABIB UR REHMAN

Reputation: 880

Swift 5

if you want to set a single string to a label in loop, you can follow this simple method.

for hash in objSinglePost?.hash_tags ?? [Hashtags].init() {
            self.lblHashtags.text = (self.lblHashtags.text ?? "") + " #" + (hash.hash_tags ?? "")
        }

Upvotes: 0

henrique
henrique

Reputation: 1112

I'd change your code like this:

if let expertise = helper.expertise {
    let expertises = expertise.joined(" • ") // join the strings with bullet point char

    let paragraphStyle = NSMutableParagraphStyle()
    paragraphStyle.lineSpacing = 10
    paragraphStyle.lineBreakMode = .byWordWrapping // line break by word wrappnig

    let attrString = NSMutableAttributedString(string: expertises)
    attrString.addAttribute(NSParagraphStyleAttributeName, value: paragraphStyle, range: 0..<attrString.characters.count) // not sure i this range will work, change to fit your needs
    lblLeft.attributedText = attrString
}

This code wasn't tested but you got the idea...

Upvotes: 0

Reinier Melian
Reinier Melian

Reputation: 20804

Taking in account that your Expertise class .name is what you need to concat, you can use map and after that as @Andrii answer suggest use join and finally adjusting the paragraphStyle.lineBreakMode, replace your code by this one

if let expertiseCount = helper.expertise {
    let paragraphStyle = NSMutableParagraphStyle()
    paragraphStyle.lineSpacing = 10
    paragraphStyle.lineBreakMode = .byWordWrapping
    let finalString = expertiseCount.map({$0.name}).joined(separator: " • ")
    let finalAttributedString = NSMutableAttributedString(string: finalString, attributes: [NSParagraphStyleAttributeName:paragraphStyle])
    lblLeft.attributedText = finalAttributedString
}

Hope this helps

Upvotes: 2

Andrii Chernenko
Andrii Chernenko

Reputation: 10194

You don't need to loop over your expertiseCount array. Arrays of strings in Swift have a special method joined(separator:), which should do exactly what you need:

let joinedExpertise = expertiseCount.joined(" • ")

Use a special bullet point character, •, as a separator.

Upvotes: 3

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