UITextField Only Top And Bottom Border

Question

I currently have a regular border. I would like to only have a top and bottom border.

How do I accomplish this?

Using the UITextField<

Answer 1

Hope this helps, put this inside a textfield override class

UIView *view = [[UIView alloc] init];
        view.translatesAutoresizingMaskIntoConstraints = NO;
        view.layer.borderWidth = 1;
        view.backgroundColor = [UIColor blackColor];
        [self addSubview:view];

        [self addConstraint:[NSLayoutConstraint constraintWithItem:view attribute:NSLayoutAttributeBottom relatedBy:NSLayoutRelationEqual toItem:self attribute:NSLayoutAttributeBottom multiplier:1.0 constant:0.0]];
        [self addConstraint:[NSLayoutConstraint constraintWithItem:view attribute:NSLayoutAttributeWidth relatedBy:NSLayoutRelationEqual toItem:self attribute:NSLayoutAttributeWidth multiplier:1.0 constant:0.0]];
        [self addConstraint:[NSLayoutConstraint constraintWithItem:view attribute:NSLayoutAttributeHeight relatedBy:NSLayoutRelationEqual toItem:nil attribute:NSLayoutAttributeHeight multiplier:1.0 constant:1.0]];
        [self addConstraint:[NSLayoutConstraint constraintWithItem:view attribute:NSLayoutAttributeCenterX relatedBy:NSLayoutRelationEqual toItem:self attribute:NSLayoutAttributeCenterX multiplier:1.0 constant:1.0]];

Answer 2

One approach I have found works good is using layers. Here's a snippet:

CALayer *bottomBorder = [CALayer layer];
bottomBorder.frame = CGRectMake(0.0f, self.frame.size.height - 1, self.frame.size.width, 1.0f);
bottomBorder.backgroundColor = [UIColor blackColor].CGColor;
[myTextField.layer addSublayer:bottomBorder];

Hope this helps someone.

Answer 3

You can use layers to add lines / shapes to any UIView subclass. This code draws two lines at the top and bottom of a text field. You can add it to a subclass of a control, or call this directly in a parent view / view controller.

CGRect layerFrame = CGRectMake(0, 0, _usernameField.frame.size.width, _usernameField.frame.size.height);
CGMutablePathRef path = CGPathCreateMutable();
CGPathMoveToPoint(path, NULL, 0, 0);
CGPathAddLineToPoint(path, NULL, layerFrame.size.width, 0); // top line
CGPathMoveToPoint(path, NULL, 0, layerFrame.size.height);
CGPathAddLineToPoint(path, NULL, layerFrame.size.width, layerFrame.size.height); // bottom line
CAShapeLayer * line = [CAShapeLayer layer];
line.path = path;
line.lineWidth = 2;
line.frame = layerFrame;
line.strokeColor = [UIColor blackColor].CGColor;
[_usernameField.layer addSublayer:line];

Answer 4

@Sebyffffd why stop there? (;

EDIT: There is an issue with lines being drawn before auto layout sets the right frame for the view, I edited my answer with a fix: it basically involves calling drawLines() in layoutSubviews():

class FramedTextField: UITextField {

    @IBInspectable var linesWidth: CGFloat = 1.0 { didSet{ drawLines() } }

    @IBInspectable var linesColor: UIColor = UIColor.blackColor() { didSet{ drawLines() } }

    @IBInspectable var leftLine: Bool = false { didSet{ drawLines() } }
    @IBInspectable var rightLine: Bool = false { didSet{ drawLines() } }
    @IBInspectable var bottomLine: Bool = false { didSet{ drawLines() } }
    @IBInspectable var topLine: Bool = false { didSet{ drawLines() } }



    func drawLines() {

        if bottomLine {
            add(CGRectMake(0.0, frame.size.height - linesWidth, frame.size.width, linesWidth))
        }

        if topLine {
            add(CGRectMake(0.0, 0.0, frame.size.width, linesWidth))
        }

        if rightLine {
            add(CGRectMake(frame.size.width - linesWidth, 0.0, linesWidth, frame.size.height))
        }

        if leftLine {
            add(CGRectMake(0.0, 0.0, linesWidth, frame.size.height))
        }

    }

    typealias Line = CGRect
    private func add(line: Line) {
        let border = CALayer()
        border.frame = line
        border.backgroundColor = linesColor.CGColor
        layer.addSublayer(border)
    }

    override func layoutSubviews() {
        super.layoutSubviews()
        drawLines()
    }

}

Answer 5

Updated for Swift 5

var bottomBorder = CALayer()
bottomBorder.frame = CGRect(x: xVal, y: yVal, width: w, height: h)
bottomBorder.backgroundColor = UIColor.black.cgColor
searchBar.layer.addSublayer(bottomBorder)