the - swift(lenguaje de programación)

NSString boundingRectWithSize: opciones: atributos: contexto: ¿no se puede usar en Swift?

Question

Me sale el error ...

Could not find an overload for ''init'' that accepts the supplied arguments

... cuando trato de usar ...

extension UIFont {
func sizeOfString (string: String, constrainedToWidth width: Double) -> CGSize {
NSString(string).boundingRectWithSize(CGSize(width, DBL_MAX),
options: NSStringDrawingOptions.UsesLineFragmentOrigin,
attributes: [NSFontAttributeName: self],
context: nil).size
}
}

¿ NSString no admite este método, o estoy desordenando la sintaxis?

Answer 1

Alternativamente, podrías lanzarlo en una NSString

if let ns_str:NSString = str as NSString? {
let sizeOfString = ns_str.boundingRectWithSize(
CGSizeMake(self.titleLabel.frame.size.width, CGFloat.infinity),
options: NSStringDrawingOptions.UsesLineFragmentOrigin,
attributes: [NSFontAttributeName: lbl.font],
context: nil).size
}

Answer 2

El último Swift:

import UIKit
extension UIFont {
func sizeOfString(string: String, constrainedToWidth width: Double) -> CGSize {
return NSString(string: string).boundingRect(with: CGSize(width: width, height: .greatestFiniteMagnitude),
options: .usesLineFragmentOrigin,
attributes: [NSFontAttributeName: self],
context: nil).size
}
}

Answer 3

Los inicializadores esperan argumentos con nombre.

extension UIFont {
func sizeOfString (string: String, constrainedToWidth width: Double) -> CGSize {
return NSString(string: string).boundingRectWithSize(CGSize(width: width, height: DBL_MAX),
options: NSStringDrawingOptions.UsesLineFragmentOrigin,
attributes: [NSFontAttributeName: self],
context: nil).size
}
}

Nota: las String se pueden convertir en NSString .

extension UIFont {
func sizeOfString (string: String, constrainedToWidth width: Double) -> CGSize {
return (string as NSString).boundingRectWithSize(CGSize(width: width, height: DBL_MAX),
options: NSStringDrawingOptions.UsesLineFragmentOrigin,
attributes: [NSFontAttributeName: self],
context: nil).size
}
}

o

extension UIFont {
func sizeOfString (string: NSString, constrainedToWidth width: Double) -> CGSize {
return string.boundingRectWithSize(CGSize(width: width, height: DBL_MAX),
options: NSStringDrawingOptions.UsesLineFragmentOrigin,
attributes: [NSFontAttributeName: self],
context: nil).size
}
}

-

ACTUALIZADO

Para la sintaxis de Swift 4

extension UIFont {
func sizeOfString (string: String, constrainedToWidth width: Double) -> CGSize {
return NSString(string: string).boundingRect(
with: CGSize(width: width, height: .greatestFiniteMagnitude),
options: .usesLineFragmentOrigin,
attributes: [.font: self],
context: nil).size
}
}

Answer 4

Puedes usar el puente objetivo-c

let lblRegisterlinkWidth: CGFloat = lblRegisterLink.text!._bridgeToObjectiveC().boundingRectWithSize(lblRegisterLink.frame.size, options: .UsesLineFragmentOrigin, attributes: [NSFontAttributeName : lblRegisterLink.font], context: nil).size.width

Answer 5

Último Swift

func sizeOfString (string: String, constrainedToHeight height: Double) -> CGSize {
return NSString(string: string).boundingRect(with: CGSize(width: DBL_MAX, height: height),
options: NSStringDrawingOptions.usesLineFragmentOrigin,
attributes: [NSFontAttributeName: UIFont.systemFont(ofSize: 20)],
context: nil).size
}

Answer 6

Versión Swift 4.1

extension UIFont {
func sizeOfString (string: String, constrainedToWidth width: Double) -> CGSize {
return NSString(string: string).boundingRect(with: CGSize(width: width, height: .greatestFiniteMagnitude), options: NSStringDrawingOptions.usesLineFragmentOrigin, attributes: [NSFontAttributeName: self], context: nil).size
}
}