How to set top-left alignment for UILabel for iOS application?

Question

I have added one label in my nib file, then its required to have top-left alignment for that lable. As I am providing text at runtime so its not sure that how much lines the

Answer 1

The SOLabel works for me.

Swift 3 & 5:

This version has been updated from the original to allow support for RTL languages:

public class VerticalAlignLabel: UILabel {
    enum VerticalAlignment {
        case top
        case middle
        case bottom
    }

    var verticalAlignment : VerticalAlignment = .top {
        didSet {
            setNeedsDisplay()
        }
    }

    override public func textRect(forBounds bounds: CGRect, limitedToNumberOfLines: Int) -> CGRect {
        let rect = super.textRect(forBounds: bounds, limitedToNumberOfLines: limitedToNumberOfLines)

        if UIView.userInterfaceLayoutDirection(for: .unspecified) == .rightToLeft {
            switch verticalAlignment {
            case .top:
                return CGRect(x: self.bounds.size.width - rect.size.width, y: bounds.origin.y, width: rect.size.width, height: rect.size.height)
            case .middle:
                return CGRect(x: self.bounds.size.width - rect.size.width, y: bounds.origin.y + (bounds.size.height - rect.size.height) / 2, width: rect.size.width, height: rect.size.height)
            case .bottom:
                return CGRect(x: self.bounds.size.width - rect.size.width, y: bounds.origin.y + (bounds.size.height - rect.size.height), width: rect.size.width, height: rect.size.height)
            }
        } else {
            switch verticalAlignment {
            case .top:
                return CGRect(x: bounds.origin.x, y: bounds.origin.y, width: rect.size.width, height: rect.size.height)
            case .middle:
                return CGRect(x: bounds.origin.x, y: bounds.origin.y + (bounds.size.height - rect.size.height) / 2, width: rect.size.width, height: rect.size.height)
            case .bottom:
                return CGRect(x: bounds.origin.x, y: bounds.origin.y + (bounds.size.height - rect.size.height), width: rect.size.width, height: rect.size.height)
            }
        }
    }

    override public func drawText(in rect: CGRect) {
        let r = self.textRect(forBounds: rect, limitedToNumberOfLines: self.numberOfLines)
        super.drawText(in: r)
    }
}

Swift 1:

class UIVerticalAlignLabel: UILabel {

enum VerticalAlignment : Int {
    case VerticalAlignmentTop = 0
    case VerticalAlignmentMiddle = 1
    case VerticalAlignmentBottom = 2
}

var verticalAlignment : VerticalAlignment = .VerticalAlignmentTop {
    didSet {
        setNeedsDisplay()
    }
}

required init(coder aDecoder: NSCoder){
    super.init(coder: aDecoder)
}

override func textRectForBounds(bounds: CGRect, limitedToNumberOfLines: Int) -> CGRect {
    let rect = super.textRectForBounds(bounds, limitedToNumberOfLines: limitedToNumberOfLines)

    switch(verticalAlignment) {
        case .VerticalAlignmentTop:
            return CGRectMake(bounds.origin.x, bounds.origin.y, rect.size.width, rect.size.height)
        case .VerticalAlignmentMiddle:
            return CGRectMake(bounds.origin.x, bounds.origin.y + (bounds.size.height - rect.size.height) / 2, rect.size.width, rect.size.height)
        case .VerticalAlignmentBottom:
            return CGRectMake(bounds.origin.x, bounds.origin.y + (bounds.size.height - rect.size.height), rect.size.width, rect.size.height)
        default:
            return bounds
    }
}

override func drawTextInRect(rect: CGRect) {
    let r = self.textRectForBounds(rect, limitedToNumberOfLines: self.numberOfLines)
    super.drawTextInRect(r)
    }
}