JKAttributedString

JKAttributedString provides Swifty API for NSAttributedString.

Sick of using NSAttributedString and NSMutableAttributedString on value typed Swift world? This makes dealing with attributed string as easy as String.

Features

• Value typed attributed string
• Typed attributes
• Easy concatination
• Character based range (not UTF-16 based NSRange!)
• Range converter between UTF-16 and character
• Support custom attributes

How to Use

Basic Usage

var aString = JKAttributedString(string: "Whatever",
                                 attributes: [.color(.gray), .font(.systemFont(ofSize: 12))])
aString.adding(attributes: [.color(.red)])  // Red "Whatever"

let bString = "Want".attributed([.font(.systemFont(ofSize: 20))])  // Size 20
// bString.adding( ... )  <- COMPILE ERROR

let cString = aString + " You " + bString
// Whatever You { color: red, size: 12 }Want{ size: 20 }

let dString = "Whenever You " + bString  // Size 20

let testString = "Doing 테스트 ".attributed([.color(.gray)])
    + "🎯 です。¶".attributed([.color(.blue)])
testString.attributes(at: testString.index(testString.startIndex, offsetBy: 9)) // Gray
testString.attributes(at: testString.index(testString.startIndex, offsetBy: 10)) // Blue

Custom Attribute Type

enum SystemFontAttribute: JKAttributeType {
    case normal(CGFloat)
    case bold(CGFloat)
    
    var name: String {
        return NSFontAttributeName
    }
    
    var value: Any {
        switch self {
        case .normal(let size):
            return UIFont.systemFont(ofSize: size)
        case .bold(let size):
            return UIFont.boldSystemFont(ofSize: size)
        }
    }
}

let systemString = "System".attributed([SystemFontAttribute.bold(20)])