framework - learn ios

¿Cómo agregar solo un borde SUPERIOR en un UIButton?

Question

Sé cómo agregar borde a un botón en iOS 7, con el siguiente código:

[[myButton layer] setBorderColor:[[[UIColor grayColor] colorWithAlphaComponent:0.5] CGColor]];
[[myButton layer] setBorderWidth:1];
[[myButton layer] setCornerRadius:15];

¿Pero cómo puedo agregar solo un borde? Quiero agregar solo el borde superior .

Answer 1

Aquí está la solución de Masgar implementada en Swift:

    var lineView = UIView(frame: CGRectMake(0, 0, btn.frame.size.width, 1))
    lineView.backgroundColor=UIColor.redColor()
    btn.addSubview(lineView)

Answer 2

De hecho, conozco estas preguntas como usted, pero creo que mi método es mejor que la respuesta que elija. Debería crear una clase que herede el UIControl como UIButton.

@interface customButton : UIButton

y reescribe el método drawrect así:

- (void)drawRect:(CGRect)rect {
// Drawing code
CGContextRef context = UIGraphicsGetCurrentContext();
CGContextSetLineCap(context, kCGLineCapRound);
CGContextSetLineWidth(context, 1.5);  //线宽
CGContextSetAllowsAntialiasing(context, true);
CGContextSetRGBStrokeColor(context, 193/255.0, 205/255.0, 193/255.0, 1.0);  //线的颜色
CGContextBeginPath(context);

CGContextMoveToPoint(context, 0, 0);  //起点坐标
CGContextAddLineToPoint(context, self.frame.size.width, 0);   //终点坐标

CGContextStrokePath(context);

}

Por cierto ~ su propósito UIControl debería usar su clase en la configuración de xib

Última ~ mostrarle mi UIButton personalizado. Creo que deberíamos elegir este método y combinar la API de UIBezierPath para finalizar nuestra demanda.

Gracias por ver ~ espero estudiar y discutir juntos ~ De un pescador de iOS - vvlong

Answer 3

Debe crear una nueva capa o ver 1 pt alto, establecer el color de fondo en el color que desea que tenga su borde y agregarlo como subvista / subcapa.

Answer 4

En Swift agrega una extensión para la clase UIView de esta manera:

Swift 2 *

import Foundation
import UIKit
extension UIView {
func addTopBorderWithColor(color: UIColor, width: CGFloat) {
    let border = CALayer()
    border.backgroundColor = color.CGColor
    border.frame = CGRectMake(0, 0, self.frame.size.width, width)
    self.layer.addSublayer(border)
}

func addRightBorderWithColor(color: UIColor, width: CGFloat) {
    let border = CALayer()
    border.backgroundColor = color.CGColor
    border.frame = CGRectMake(self.frame.size.width - width, 0, width, self.frame.size.height)
    self.layer.addSublayer(border)
}

func addBottomBorderWithColor(color: UIColor, width: CGFloat) {
    let border = CALayer()
    border.backgroundColor = color.CGColor
    border.frame = CGRectMake(0, self.frame.size.height - width, self.frame.size.width, width)
    self.layer.addSublayer(border)
}

func addLeftBorderWithColor(color: UIColor, width: CGFloat) {
    let border = CALayer()
    border.backgroundColor = color.CGColor
    border.frame = CGRectMake(0, 0, width, self.frame.size.height)
    self.layer.addSublayer(border)
}

}

Swift 3 *

extension UIView {
func addTopBorderWithColor(color: UIColor, width: CGFloat) {
    let border = CALayer()
    border.backgroundColor = color.cgColor
    border.frame = CGRect(x:0,y: 0, width:self.frame.size.width, height:width)
    self.layer.addSublayer(border)
}

func addRightBorderWithColor(color: UIColor, width: CGFloat) {
    let border = CALayer()
    border.backgroundColor = color.cgColor
    border.frame = CGRect(x: self.frame.size.width - width,y: 0, width:width, height:self.frame.size.height)
    self.layer.addSublayer(border)
}

func addBottomBorderWithColor(color: UIColor, width: CGFloat) {
    let border = CALayer()
    border.backgroundColor = color.cgColor
    border.frame = CGRect(x:0, y:self.frame.size.height - width, width:self.frame.size.width, height:width)
    self.layer.addSublayer(border)
}

func addLeftBorderWithColor(color: UIColor, width: CGFloat) {
    let border = CALayer()
    border.backgroundColor = color.cgColor
    border.frame = CGRect(x:0, y:0, width:width, height:self.frame.size.height)
    self.layer.addSublayer(border)
}
}

Obtuve esta extensión desde este enlace: UIView borde inferior?

Luego llama a la función de esta manera

var innerView : UIView?
    let borderWidth: CGFloat = 1.0
    let borderColor : UIColor =  UIColor.redColor()
    innerView!.addTopBorderWithColor(borderColor, width: borderWidth)

Para el diseño adaptativo use este Swift 2.

extension UIView {   

func addTopBorder(color: UIColor, height: CGFloat) {
    let border = UIView()
    border.backgroundColor = color
    border.translatesAutoresizingMaskIntoConstraints = false
    self.addSubview(border)
    border.addConstraint(NSLayoutConstraint(item: border,
        attribute: NSLayoutAttribute.Height,
        relatedBy: NSLayoutRelation.Equal,
        toItem: nil,
        attribute: NSLayoutAttribute.Height,
        multiplier: 1, constant: height))
    self.addConstraint(NSLayoutConstraint(item: border,
        attribute: NSLayoutAttribute.Top,
        relatedBy: NSLayoutRelation.Equal,
        toItem: self,
        attribute: NSLayoutAttribute.Top,
        multiplier: 1, constant: 0))
    self.addConstraint(NSLayoutConstraint(item: border,
        attribute: NSLayoutAttribute.Leading,
        relatedBy: NSLayoutRelation.Equal,
        toItem: self,
        attribute: NSLayoutAttribute.Leading,
        multiplier: 1, constant: 0))
    self.addConstraint(NSLayoutConstraint(item: border,
        attribute: NSLayoutAttribute.Trailing,
        relatedBy: NSLayoutRelation.Equal,
        toItem: self,
        attribute: NSLayoutAttribute.Trailing,
        multiplier: 1, constant: 0))
}

func addBottomBorder(color: UIColor, height: CGFloat) {
    let border = UIView()
    border.backgroundColor = color
    border.translatesAutoresizingMaskIntoConstraints = false
    self.addSubview(border)
    border.addConstraint(NSLayoutConstraint(item: border,
        attribute: NSLayoutAttribute.Height,
        relatedBy: NSLayoutRelation.Equal,
        toItem: nil,
        attribute: NSLayoutAttribute.Height,
        multiplier: 1, constant: height))
    self.addConstraint(NSLayoutConstraint(item: border,
        attribute: NSLayoutAttribute.Bottom,
        relatedBy: NSLayoutRelation.Equal,
        toItem: self,
        attribute: NSLayoutAttribute.Bottom,
        multiplier: 1, constant: 0))
    self.addConstraint(NSLayoutConstraint(item: border,
        attribute: NSLayoutAttribute.Leading,
        relatedBy: NSLayoutRelation.Equal,
        toItem: self,
        attribute: NSLayoutAttribute.Leading,
        multiplier: 1, constant: 0))
    self.addConstraint(NSLayoutConstraint(item: border,
        attribute: NSLayoutAttribute.Trailing,
        relatedBy: NSLayoutRelation.Equal,
        toItem: self,
        attribute: NSLayoutAttribute.Trailing,
        multiplier: 1, constant: 0))
}
func addLeftBorder(color: UIColor, width: CGFloat) {
    let border = UIView()
    border.backgroundColor = color
    border.translatesAutoresizingMaskIntoConstraints = false
    self.addSubview(border)
    border.addConstraint(NSLayoutConstraint(item: border,
        attribute: NSLayoutAttribute.Width,
        relatedBy: NSLayoutRelation.Equal,
        toItem: nil,
        attribute: NSLayoutAttribute.Width,
        multiplier: 1, constant: width))
    self.addConstraint(NSLayoutConstraint(item: border,
        attribute: NSLayoutAttribute.Leading,
        relatedBy: NSLayoutRelation.Equal,
        toItem: self,
        attribute: NSLayoutAttribute.Leading,
        multiplier: 1, constant: 0))
    self.addConstraint(NSLayoutConstraint(item: border,
        attribute: NSLayoutAttribute.Bottom,
        relatedBy: NSLayoutRelation.Equal,
        toItem: self,
        attribute: NSLayoutAttribute.Bottom,
        multiplier: 1, constant: 0))
    self.addConstraint(NSLayoutConstraint(item: border,
        attribute: NSLayoutAttribute.Top,
        relatedBy: NSLayoutRelation.Equal,
        toItem: self,
        attribute: NSLayoutAttribute.Top,
        multiplier: 1, constant: 0))
}
func addRightBorder(color: UIColor, width: CGFloat) {
    let border = UIView()
    border.backgroundColor = color
    border.translatesAutoresizingMaskIntoConstraints = false
    self.addSubview(border)
    border.addConstraint(NSLayoutConstraint(item: border,
        attribute: NSLayoutAttribute.Width,
        relatedBy: NSLayoutRelation.Equal,
        toItem: nil,
        attribute: NSLayoutAttribute.Width,
        multiplier: 1, constant: width))
    self.addConstraint(NSLayoutConstraint(item: border,
        attribute: NSLayoutAttribute.Trailing,
        relatedBy: NSLayoutRelation.Equal,
        toItem: self,
        attribute: NSLayoutAttribute.Trailing,
        multiplier: 1, constant: 0))
    self.addConstraint(NSLayoutConstraint(item: border,
        attribute: NSLayoutAttribute.Bottom,
        relatedBy: NSLayoutRelation.Equal,
        toItem: self,
        attribute: NSLayoutAttribute.Bottom,
        multiplier: 1, constant: 0))
    self.addConstraint(NSLayoutConstraint(item: border,
        attribute: NSLayoutAttribute.Top,
        relatedBy: NSLayoutRelation.Equal,
        toItem: self,
        attribute: NSLayoutAttribute.Top,
        multiplier: 1, constant: 0))
}

}

button!.addTopBorder(UIColor(red: 247.0/255.0, green: 147.0/255.0, blue: 29.0/255.0, alpha: 0.5), height: borderWidth)

Swift 3

extension UIView {

func addTopBorder(_ color: UIColor, height: CGFloat) {
    let border = UIView()
    border.backgroundColor = color
    border.translatesAutoresizingMaskIntoConstraints = false
    self.addSubview(border)
    border.addConstraint(NSLayoutConstraint(item: border,
        attribute: NSLayoutAttribute.height,
        relatedBy: NSLayoutRelation.equal,
        toItem: nil,
        attribute: NSLayoutAttribute.height,
        multiplier: 1, constant: height))
    self.addConstraint(NSLayoutConstraint(item: border,
        attribute: NSLayoutAttribute.top,
        relatedBy: NSLayoutRelation.equal,
        toItem: self,
        attribute: NSLayoutAttribute.top,
        multiplier: 1, constant: 0))
    self.addConstraint(NSLayoutConstraint(item: border,
        attribute: NSLayoutAttribute.leading,
        relatedBy: NSLayoutRelation.equal,
        toItem: self,
        attribute: NSLayoutAttribute.leading,
        multiplier: 1, constant: 0))
    self.addConstraint(NSLayoutConstraint(item: border,
        attribute: NSLayoutAttribute.trailing,
        relatedBy: NSLayoutRelation.equal,
        toItem: self,
        attribute: NSLayoutAttribute.trailing,
        multiplier: 1, constant: 0))
}

func addBottomBorder(_ color: UIColor, height: CGFloat) {
    let border = UIView()
    border.backgroundColor = color
    border.translatesAutoresizingMaskIntoConstraints = false
    self.addSubview(border)
    border.addConstraint(NSLayoutConstraint(item: border,
        attribute: NSLayoutAttribute.height,
        relatedBy: NSLayoutRelation.equal,
        toItem: nil,
        attribute: NSLayoutAttribute.height,
        multiplier: 1, constant: height))
    self.addConstraint(NSLayoutConstraint(item: border,
        attribute: NSLayoutAttribute.bottom,
        relatedBy: NSLayoutRelation.equal,
        toItem: self,
        attribute: NSLayoutAttribute.bottom,
        multiplier: 1, constant: 0))
    self.addConstraint(NSLayoutConstraint(item: border,
        attribute: NSLayoutAttribute.leading,
        relatedBy: NSLayoutRelation.equal,
        toItem: self,
        attribute: NSLayoutAttribute.leading,
        multiplier: 1, constant: 0))
    self.addConstraint(NSLayoutConstraint(item: border,
        attribute: NSLayoutAttribute.trailing,
        relatedBy: NSLayoutRelation.equal,
        toItem: self,
        attribute: NSLayoutAttribute.trailing,
        multiplier: 1, constant: 0))
}
func addLeftBorder(_ color: UIColor, width: CGFloat) {
    let border = UIView()
    border.backgroundColor = color
    border.translatesAutoresizingMaskIntoConstraints = false
    self.addSubview(border)
    border.addConstraint(NSLayoutConstraint(item: border,
        attribute: NSLayoutAttribute.width,
        relatedBy: NSLayoutRelation.equal,
        toItem: nil,
        attribute: NSLayoutAttribute.width,
        multiplier: 1, constant: width))
    self.addConstraint(NSLayoutConstraint(item: border,
        attribute: NSLayoutAttribute.leading,
        relatedBy: NSLayoutRelation.equal,
        toItem: self,
        attribute: NSLayoutAttribute.leading,
        multiplier: 1, constant: 0))
    self.addConstraint(NSLayoutConstraint(item: border,
        attribute: NSLayoutAttribute.bottom,
        relatedBy: NSLayoutRelation.equal,
        toItem: self,
        attribute: NSLayoutAttribute.bottom,
        multiplier: 1, constant: 0))
    self.addConstraint(NSLayoutConstraint(item: border,
        attribute: NSLayoutAttribute.top,
        relatedBy: NSLayoutRelation.equal,
        toItem: self,
        attribute: NSLayoutAttribute.top,
        multiplier: 1, constant: 0))
}
func addRightBorder(_ color: UIColor, width: CGFloat) {
    let border = UIView()
    border.backgroundColor = color
    border.translatesAutoresizingMaskIntoConstraints = false
    self.addSubview(border)
    border.addConstraint(NSLayoutConstraint(item: border,
        attribute: NSLayoutAttribute.width,
        relatedBy: NSLayoutRelation.equal,
        toItem: nil,
        attribute: NSLayoutAttribute.width,
        multiplier: 1, constant: width))
    self.addConstraint(NSLayoutConstraint(item: border,
        attribute: NSLayoutAttribute.trailing,
        relatedBy: NSLayoutRelation.equal,
        toItem: self,
        attribute: NSLayoutAttribute.trailing,
        multiplier: 1, constant: 0))
    self.addConstraint(NSLayoutConstraint(item: border,
        attribute: NSLayoutAttribute.bottom,
        relatedBy: NSLayoutRelation.equal,
        toItem: self,
        attribute: NSLayoutAttribute.bottom,
        multiplier: 1, constant: 0))
    self.addConstraint(NSLayoutConstraint(item: border,
        attribute: NSLayoutAttribute.top,
        relatedBy: NSLayoutRelation.equal,
        toItem: self,
        attribute: NSLayoutAttribute.top,
        multiplier: 1, constant: 0))
}
}

Uso:

button!.addTopBorder(UIColor(red: 247.0/255.0, green: 147.0/255.0, blue: 29.0/255.0, alpha: 0.5), height: borderWidth)

Answer 5

La mejor y más simple ...

btnTest.selectiveBorderFlag = AUISelectiveBordersFlagBottom | AUISelectiveBordersFlagTop;
btnTest.selectiveBordersColor = [UIColor redColor];
btnTest.selectiveBordersWidth = 3.0;

Lo he hecho usando: este código fuente abierto

Answer 6

No puedes usar los métodos de esta capa.
La mejor solución aquí es crear una imagen pequeña (por código o photoshop), usar el - (UIImage *)resizableImageWithCapInsets:(UIEdgeInsets)capInsets resizingMode:(UIImageResizingMode)resizingMode para cambiar el tamaño de acuerdo con el aspecto que desea dar y agregarlo como una imagen de fondo. Este es realmente un buen enfoque porque le ayuda a mantener un espacio de memoria muy pequeño y que adapta su imagen a todos los tamaños de botón.
Aquí un buen tutorial .

Answer 7

Si necesita algo diferente al predeterminado, debe dibujarlo manualmente.

Answer 8

Solo dibuja el borde tú mismo:

@implementation TopBorderButton
- (void)drawRect:(CGRect)rect
{
    CGContextRef context = UIGraphicsGetCurrentContext();
    CGContextSetFillColorWithColor(context, [UIColor redColor].CGColor);
    CGContextFillRect(context, CGRectMake(0.0f, 0.0, self.frame.size.width, 1.0));
}
@end

Answer 9

Swift 4

UIButton Top Border

var lineView = UIView(frame: CGRect(x: 0, y: 0, width: button.frame.size.width, height: 2))
lineView.backgroundColor= UIColor.black
button.addSubview(lineView)

UIButton Bottom Border

var lineView = UIView(frame: CGRect(x: 0, y: button.frame.size.height, width: button.frame.size.width, height: 2))
lineView.backgroundColor= UIColor.black
button.addSubview(lineView)

Answer 10

UIView *lineView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, btn.frame.size.width, 1)];
lineView.backgroundColor = [UIColor redColor];
[btn addSubview:lineView];

puedes hacer lo mismo para cada frontera. Al agregar múltiples UIViews puede agregar abajo, izquierda o arriba y derecha o cualquier borde que desee.

es decir, abajo y a la izquierda:

UIView *bottomBorder = [[UIView alloc] initWithFrame:CGRectMake(0, btn.frame.size.height - 1.0f, btn.frame.size.width, 1)];
bottomBorder.backgroundColor = [UIColor redColor];

UIView *leftBorder = [[UIView alloc] initWithFrame:CGRectMake(1, 0, 1, btn.frame.size.height)];
leftBorder.backgroundColor = [UIColor redColor];

[btn addSubview:bottomBorder];
[btn addSubview:leftBorder];

si no usa ARC, recuerde liberar UIViews después de agregar subvistas (o use la liberación automática).