print All Font list

AllFont.swift

for family in UIFont.familyNames {
    
    let sName: String = family as String
    print("family: \(sName)")
    
    for name in UIFont.fontNames(forFamilyName: sName) {
        print("name: \(name as String)")
        let customFont = UIFont(name: name, size: 11)
        print("font is nil?: \(customFont)")
    }
}