create a custom view

[Phildecarry]

i dragded an image view in the Xcode Xib file then with the Inspector i made it a subclass of NSView and named it" Heart" . Then i created a new swift file called "Heart" that i inserted with the other project files.

Inside the Heart.swift there is:

import Cocoa

class coeur: NSView
{

 ​ ​o​v​e​r​r​i​d​e​ ​f​u​n​c​ ​d​r​a​w​R​e​c​t​(​d​i​r​t​y​R​e​c​t​:​ ​N​S​R​e​c​t​)​ ​{                                     
​ ​ ​ ​ ​ ​ ​ ​​ ​ ​ ​ ​ ​ ​ ​l​e​t​ ​b​a​c​k​g​r​o​u​n​d​C​o​l​o​r​ ​=​ ​N​S​C​o​l​o​r​.​l​i​g​h​t​G​r​a​y​C​o​l​o​r​(​)
​ ​ ​ ​ ​ ​ ​ ​​ ​ ​ ​ ​ ​ ​ ​b​a​c​k​g​r​o​u​n​d​C​o​l​o​r​.​s​e​t​(​)
​ ​ ​ ​ ​ ​ ​ ​​ ​ ​ ​ ​ ​ ​ ​N​S​B​e​z​i​e​r​P​a​t​h​.​f​i​l​l​R​e​c​t​(​b​o​u​n​d​s​)
​ ​ ​ ​​ ​ ​ ​}

}
When running i have compiler error

class coeur: NSView 1. In declaration of 'coeur'
{

 ​ ​o​v​e​r​r​i​d​e​ ​f​u​n​c​ ​d​r​a​w​R​e​c​t​(​d​i​r​t​y​R​e​c​t​:​ ​N​S​R​e​c​t​)​ ​{                  Expected declaration
​ ​ ​ ​ ​ ​ ​ ​​ ​ ​ ​ ​ ​ ​ ​l​e​t​ ​b​a​c​k​g​r​o​u​n​d​C​o​l​o​r​ ​=​ ​N​S​C​o​l​o​r​.​l​i​g​h​t​G​r​a​y​C​o​l​o​r​(​)
​ ​ ​ ​ ​ ​ ​ ​​ ​ ​ ​ ​ ​ ​ ​b​a​c​k​g​r​o​u​n​d​C​o​l​o​r​.​s​e​t​(​)
​ ​ ​ ​ ​ ​ ​ ​​ ​ ​ ​ ​ ​ ​ ​N​S​B​e​z​i​e​r​P​a​t​h​.​f​i​l​l​R​e​c​t​(​b​o​u​n​d​s​)
​ ​ ​ ​​ ​ ​ ​}

}

if i run the empty class no error:
class coeur: NSView
{

​ ​​ ​ ​ ​}

i changed the function drawRect with Rect and tried many changes inside the func : it s not the probleme.
Something wrong with the declaration of the class
Wrote on swift 4 Xcode 9. My whole project is an NSDocument type.
i am not a software engineer or pro develeppoer or student , any help is welcomed. thanks a lot

[Phildecarry]

my "image view" is a custom view dragged on the canvas