Swift: Come rimuovere il bordo dal controllo segmentato

Question

come rimuovere il bordo esterno di un controllo segmentato in xcode? Ho impostato l'immagine del divisore su quello che volevo ma ora per seguire la simulazione della mia app ho bisogno di avere un controllo segmentato senza il bordo esterno.

Answer 1

È possibile rimuovere sia i bordi che i divisori utilizzando la funzione seguente. Creare estensione UISegmentedControl:

For Swift 2.2:

extension UISegmentedControl { 
    func removeBorders() { 
     setBackgroundImage(imageWithColor(backgroundColor!), forState: .Normal, barMetrics: .Default) 
     setBackgroundImage(imageWithColor(tintColor!), forState: .Selected, barMetrics: .Default) 
     setDividerImage(imageWithColor(UIColor.clearColor()), forLeftSegmentState: .Normal, rightSegmentState: .Normal, barMetrics: .Default) 
    } 

    // create a 1x1 image with this color 
    private func imageWithColor(color: UIColor) -> UIImage { 
     let rect = CGRectMake(0.0, 0.0, 1.0, 1.0) 
     UIGraphicsBeginImageContext(rect.size) 
     let context = UIGraphicsGetCurrentContext() 
     CGContextSetFillColorWithColor(context, color.CGColor); 
     CGContextFillRect(context, rect); 
     let image = UIGraphicsGetImageFromCurrentImageContext(); 
     UIGraphicsEndImageContext(); 
     return image 
    } 
} 

For Swift 3:

extension UISegmentedControl { 
    func removeBorders() { 
     setBackgroundImage(imageWithColor(color: backgroundColor!), for: .normal, barMetrics: .default) 
     setBackgroundImage(imageWithColor(color: tintColor!), for: .selected, barMetrics: .default) 
     setDividerImage(imageWithColor(color: UIColor.clear), forLeftSegmentState: .normal, rightSegmentState: .normal, barMetrics: .default) 
    } 

    // create a 1x1 image with this color 
    private func imageWithColor(color: UIColor) -> UIImage { 
     let rect = CGRect(x: 0.0, y: 0.0, width: 1.0, height: 1.0) 
     UIGraphicsBeginImageContext(rect.size) 
     let context = UIGraphicsGetCurrentContext() 
     context!.setFillColor(color.cgColor); 
     context!.fill(rect); 
     let image = UIGraphicsGetImageFromCurrentImageContext(); 
     UIGraphicsEndImageContext(); 
     return image! 
    } 
} 

Chiamare la funzione di cui sopra.

segmentedControl.removeBorders() 

Riferimento: Remove UISegmentedControl separators completely. (iphone)

Grazie a https://stackoverflow.com/users/3921490/amagain per Swift 3 versione.

Answer 2

Ecco la versione 3 rapida della risposta di Sohil che potrebbe aiutare qualcun altro. Mi ha aiutato. :)

extension UISegmentedControl { 
func removeBorders() { 
    setBackgroundImage(imageWithColor(color: backgroundColor!), for: .normal, barMetrics: .default) 
    setBackgroundImage(imageWithColor(color: tintColor!), for: .selected, barMetrics: .default) 
    setDividerImage(imageWithColor(color: UIColor.clear), forLeftSegmentState: .normal, rightSegmentState: .normal, barMetrics: .default) 
} 

// create a 1x1 image with this color 
private func imageWithColor(color: UIColor) -> UIImage { 
    let rect = CGRect(x: 0.0, y: 0.0, width: 1.0, height: 1.0) 
    UIGraphicsBeginImageContext(rect.size) 
    let context = UIGraphicsGetCurrentContext() 
    context!.setFillColor(color.cgColor); 
    context!.fill(rect); 
    let image = UIGraphicsGetImageFromCurrentImageContext(); 
    UIGraphicsEndImageContext(); 
    return image! 
    } 
} 

Answer 3

Se si desidera salvare i confini tra le cellule

extension UISegmentedControl { 
    func removeBorders() { 
    if let backgroundColor = backgroundColor, let backgroundImage = UIImage.imageWithSize(size: CGSize.one_one, color: backgroundColor){ 
     setBackgroundImage(backgroundImage, for: .normal, barMetrics: .default) 
    } 

    if let tintColor = tintColor, let tintImage = UIImage.imageWithSize(size: CGSize.one_one, color: tintColor){ 
     setBackgroundImage(tintImage, for: .selected, barMetrics: .default) 
     setDividerImage(tintImage, forLeftSegmentState: .normal, rightSegmentState: .normal, barMetrics: .default) 
    } 
    } 
} 

extension CGSize{ 
    static var one_one: CGSize{ 
    return CGSize(width: 1.0, height: 1.0) 
    } 
} 

extension UIImage{ 
    static func imageWithSize(size : CGSize, color : UIColor = UIColor.white) -> UIImage? { 
    var image:UIImage? = nil 
    UIGraphicsBeginImageContext(size) 
    if let context = UIGraphicsGetCurrentContext() { 
     context.setFillColor(color.cgColor) 
     context.addRect(CGRect(origin: CGPoint.zero, size: size)); 
     context.drawPath(using: .fill) 
     image = UIGraphicsGetImageFromCurrentImageContext(); 
    } 
    UIGraphicsEndImageContext() 
    return image 
    } 
}