有没有一种方法可以创建一个包含所有已创建颜色对象的数组？以便每次添加新颜色时，它也自动添加到数组中？classColours{varcolourName:StringvarcolourShades:[String?]init(colourName:String,colourShades:[String?]){self.colourName=colourNameself.colourShades=colourShades}}varred=Colours(colourName:"Red",colourShades:["Crimson","Cherry","Rose"])varblue=Co