TableView数组节自己重新排序？ （程序修复？）

Question

I list my array in a specific order-however, when I launch simulator, the section array is out of intended order.

I have tried rearranging the array order but can't pin why Xcode keeps rearranging the sections

Is there something I am missing? If so, how can I fix? (desired order is as listed in array: Boats -> Trains -> Planes -> Cars

Answer 1

A dictionary is unordered by definition. The order in viewDidLoad is undefined. I recommend to create the array of objects directly rather than from a dictionary

 
 
 
  
  let transportMeans : [String: [String]] = ["Boats" : ["Tugboat", "Tanker"], "Trains" : ["Bullet", "Freight", "Commuter"],"Planes" : ["Fighter Jet", "Cargo Jet", "Commercial Jet"], "Cars" : ["Coupe", "Truck", "Mini"]]
 
  

override func viewDidLoad() {
    super.viewDidLoad()

    objectArray = [Objects(sectionName: "Boats", sectionObjects: ["Tugboat", "Tanker"], sectionImages: ["Tugboat", "Tanker"]),
                   Objects(sectionName: "Trains", sectionObjects: ["Bullet", "Freight", "Commuter"], sectionImages: ["Bullet", "Freight", "Commuter"]),
                   Objects(sectionName: "Planes", sectionObjects: ["Fighter Jet", "Cargo Jet", "Commercial Jet"], sectionImages: ["Fighter Jet", "Cargo Jet", "Commercial Jet"]),
                   Objects(sectionName: "Cars", sectionObjects: ["Coupe", "Truck", "Mini"], sectionImages: ["Coupe", "Truck", "Mini"])
    ]
}

And – once again – never declare struct members as implicit unwrapped optional, remove the exclamation mark

var sectionObjects : [String]

Note: the sectionImages array is redundant. You can get the image from sectionObjects , too