Get each line of text in a UILabel

Question

I\'m trying to add each line in a UILabel to an array, but the code I\'m using doesn\'t appear to be terribly accurate.

func getLinesArrayOfStri         


        

Answer 1

So it appears to be something with UILabel and not something wrong with the function you are using. It was my suspicion that a CATextLayer would render the lines how they are returned from that method and I found out sadly :( that I am right.

Here is a picture of my results:

The red is the exact code you used to create your UILabel.

The green is a CATextLayer with all of the same characteristics of the UILabel from above including font, fontsize, and frame size.

The yellow is a subclassed UIView that is replacing its own layer and returning a CATextLayer. I am attaching it below. You can continue to build it out to meet your needs but I think this is the real solution and the only one that will have the get lines matching the visible lines the user sees. If you come up with a better solution please let me know.

import UIKit

class AGLabel: UIView {

    var alignment : String = kCAAlignmentLeft{
        didSet{
            configureText()
        }
    }
    var font : UIFont = UIFont.systemFont(ofSize: 16){
        didSet{
            configureText()
        }
    }
    var fontSize : CGFloat = 16.0{
        didSet{
            configureText()
        }
    }
    var textColor : UIColor = UIColor.black{
        didSet{
            configureText()
        }
    }

    var text : String = ""{
        didSet{
            configureText()
        }
    }


    override class var layerClass: AnyClass {
        get {
            return CATextLayer.self
        }
    }

    func configureText(){
        if let textLayer = self.layer as? CATextLayer{
            textLayer.foregroundColor = textColor.cgColor
            textLayer.font = font
            textLayer.fontSize = fontSize
            textLayer.string = text
            textLayer.contentsScale = UIScreen.main.scale
            textLayer.contentsGravity = kCAGravityCenter
            textLayer.isWrapped = true
        }
    }
}

You should also check out Core-Text-Label on GitHub. It renders exactly as the CATextLayers do and would match the return of the get lines. It won't work for my particular needs as I need mine to be resizable and it crashes but if resizing is not need then I would check it out.

Finally I am back again and it appears that it could be a problem of word wrap that was started in iOS 11 where they do not leave an orphan word on a line.