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iOS Swift: How to find text width, text height or size of UILabel.
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extension UILabel { | |
func textWidth() -> CGFloat { | |
return UILabel.textWidth(label: self) | |
} | |
class func textWidth(label: UILabel) -> CGFloat { | |
return textWidth(label: label, text: label.text!) | |
} | |
class func textWidth(label: UILabel, text: String) -> CGFloat { | |
return textWidth(font: label.font, text: text) | |
} | |
class func textWidth(font: UIFont, text: String) -> CGFloat { | |
return textSize(font: font, text: text).width | |
} | |
class func textHeight(withWidth width: CGFloat, font: UIFont, text: String) -> CGFloat { | |
return textSize(font: font, text: text, width: width).height | |
} | |
class func textSize(font: UIFont, text: String, extra: CGSize) -> CGSize { | |
var size = textSize(font: font, text: text) | |
size.width = size.width + extra.width | |
size.height = size.height + extra.height | |
return size | |
} | |
class func textSize(font: UIFont, text: String, width: CGFloat = .greatestFiniteMagnitude, height: CGFloat = .greatestFiniteMagnitude) -> CGSize { | |
let label = UILabel(frame: CGRect(x: 0, y: 0, width: width, height: height)) | |
label.numberOfLines = 0 | |
label.font = font | |
label.text = text | |
label.sizeToFit() | |
return label.frame.size | |
} | |
class func countLines(font: UIFont, text: String, width: CGFloat, height: CGFloat = .greatestFiniteMagnitude) -> Int { | |
// Call self.layoutIfNeeded() if your view uses auto layout | |
let myText = text as NSString | |
let rect = CGSize(width: width, height: height) | |
let labelSize = myText.boundingRect(with: rect, options: .usesLineFragmentOrigin, attributes: [NSAttributedStringKey.font: font], context: nil) | |
return Int(ceil(CGFloat(labelSize.height) / font.lineHeight)) | |
} | |
func countLines(width: CGFloat = .greatestFiniteMagnitude, height: CGFloat = .greatestFiniteMagnitude) -> Int { | |
// Call self.layoutIfNeeded() if your view uses auto layout | |
let myText = (self.text ?? "") as NSString | |
let rect = CGSize(width: width, height: height) | |
let labelSize = myText.boundingRect(with: rect, options: .usesLineFragmentOrigin, attributes: [NSAttributedStringKey.font: self.font], context: nil) | |
return Int(ceil(CGFloat(labelSize.height) / self.font.lineHeight)) | |
} | |
} |
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