Xcode 8 how to show description of function while typing

If you are looking for the way to document self-created method in swift then this might give you a way out.

import Foundation/// 🚲 A two-wheeled, human-powered mode of transportation.class Bicycle {/**    Frame and construction style.    - Road: For streets or trails.    - Touring: For long journeys.    - Cruiser: For casual trips around town.    - Hybrid: For general-purpose transportation.*/enum Style {    case Road, Touring, Cruiser, Hybrid}/**    Mechanism for converting pedal power into motion.    - Fixed: A single, fixed gear.    - Freewheel: A variable-speed, disengageable gear.*/enum Gearing {    case Fixed    case Freewheel(speeds: Int)}/**    Hardware used for steering.    - Riser: A casual handlebar.    - Café: An upright handlebar.    - Drop: A classic handlebar.    - Bullhorn: A powerful handlebar.*/enum Handlebar {    case Riser, Café, Drop, Bullhorn}/// The style of the bicycle.let style: Style/// The gearing of the bicycle.let gearing: Gearing/// The handlebar of the bicycle.let handlebar: Handlebar/// The size of the frame, in centimeters.let frameSize: Int/// The number of trips travelled by the bicycle.private(set) var numberOfTrips: Int/// The total distance travelled by the bicycle, in meters.private(set) var distanceTravelled: Double/**    Initializes a new bicycle with the provided parts and specifications.    - Parameters:        - style: The style of the bicycle        - gearing: The gearing of the bicycle        - handlebar: The handlebar of the bicycle        - frameSize: The frame size of the bicycle, in centimeters    - Returns: A beautiful, brand-new bicycle, custom built      just for you.*/init(style: Style, gearing: Gearing, handlebar: Handlebar, frameSize centimeters: Int) {    self.style = style    self.gearing = gearing    self.handlebar = handlebar    self.frameSize = centimeters    self.numberOfTrips = 0    self.distanceTravelled = 0}/**    Take a bike out for a spin.    - Parameter meters: The distance to travel in meters.*/func travel(distance meters: Double) {    if meters > 0 {        distanceTravelled += meters        ++numberOfTrips    }}}

Swift-Documentation on NSHipster

I am using Xcode 9.4.1 and I found this...

Parameters picked from function automatically. Place your cursor on the line above the function.

/// <#Description#>////// - Parameters:///   - param1: <#param1 description#>///   - param2: <#param2 description#>

Select your function or place the cursor before your function, then click

Xcode - Editor - Structure -> Add Documentation./** <#Description#> */

Save the file, or simply restart the Xcode. Then check the suggestion while calling the respective function.I hope this might help.