Swift displaying passed data from prepareForSegue - xcode

Question

Ok, first time I have ever had to ask for help on here, usually I can search and find my answer but not this time. I have a table that displays a pictures and names. If one of them are selected it goes to another view and the data passes. However, I am trying to get that passed information to display in a table like: Name: (Passed Info), Age: (Passed Info), Gender: (Passed Info) etc. I know the data passes because I can display the info in a label, but I can not figure out how to get it to show in a table. Index issue? String Issue?
This is code that passes the info:
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
var detailsViewController: DetailsViewController = segue.destinationViewController as DetailsViewController
var horseIndex = appsTableView!.indexPathForSelectedRow()!.row
var selectedHorse = self.horses[horseIndex]
detailsViewController.horse = selectedHorse
This is the code on the controller getting the data where I want the table to display
class DetailsViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {
#IBOutlet var tableView: UITableView!
#IBOutlet weak var titleLabel: UILabel!
var horse: Herd?
required init(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
}
override func viewDidLoad() {
super.viewDidLoad()
self.tableView.registerClass(UITableViewCell.self, forCellReuseIdentifier: "cell")
}
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return self.horse.count;
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
var cell:UITableViewCell = self.tableView.dequeueReusableCellWithIdentifier("cell") as UITableViewCell
cell.textLabel?.text = self.horse[indexPath.Row]
return cell
}
}
I get an error on the return self.horse.count stating not a member and an error on the self.horse[indexPath.Row] stating NSIndex does not have a member named row.
I feel like I am not unwrapping it properly or something, but I can not figure it out or find an answer in my searches. If you need more information please let me know and thanks in advance for any help.

Answer 1

CLARIFYING...
You correctly grab self.horses[horseIndex] in the segue method, so you've already done the work to get the 1 specific horse. No need to do it again. Is self.horses tied to the Herd type? Confusing why Herd shows up again in the DetailView - you don't seem to need it.
It sounds like what you actually want at this point is a tabular layout of the details of that single horse ... Correct? Like going from your entire "Contacts" list to the tabular view of a single contact?
That no longer involves the array of multiple horses, so your use of Herd? and herd.count aren't necessary. Use static labels or a static tableView to show the info from the 1 Horse.
WHAT'S YOUR DATA STRUCTURE & WHAT GOES IN DETAIL VIEW?
Presumably what you want to create (if you haven't already) is a Horse Type:
class Horse {
//you could use optional properties here, or require them for a fully initialized Horse.
let name:String?
let gender:String?
let breed:String?
var age:Int?
var restingHeartRate:Int?
init(name:String?, gender:String?, breed:String?, age:Int?, restingHeartRate:Int?) {
//set arguments passed in to respective properties of self...
}
func winTripleCrown() {
println("\(name!) Wins! Suck on that, Sea Biscuit!")
}
}
Ensure your horses array is declared to only take Horse instances, and fill it appropriately:
var horses = [Horse]()
let horse1 = Horse(name:"Bob" gender:"male" breed: "Yessir, I am a real horse" age:42 restingHeartRate: 30)
horses.append(horse1)
println(horses.count) //prints "1"
horses[0].winTripleCrown() //prints: "Bob Wins! Suck on that, Sea Biscuit!"
Use the Horse Type instead of Herd in the DetailViewController:
var horse: Horse? //nil until set in prepareForSegue
Then in the segue method:
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
...
detailsViewController.horse = selectedHorse
Now, assuming you only put properly created Horse instances into the initial array, and there IS one at the selectedIndex, you're guaranteed that the horse variable in DetailViewController is a Horse instance, and that it's the one selected in the 1st "overall" tableView.
CREATE THE DETAIL VIEW
EASY:
The easy solution at this point is to create a detailView layout with labels, images, etc and hook them up to #properties in the DetailViewController. Then map the Horse properties to the #IBOutlets. Done. No need to mess w/tableViews anymore - just fake it or use a scrollView to make it look like a table.
TABLEVIEW ROUTE
But if you want to use a UITableView, then you'd need the delegate methods like you're using... The difference is you need to look at the # of properties of the single Horse instance - not anything about the overall list of Horses in a Herd or total array.
You COULD hard-code the # of rows if you're certain the # and order of Horse properties will always be consistent:
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 5 //1 row per property in a `Horse` instance as defined above
}
However, if you want to account for more dynamic results (like an array of wins/losses, or a photo gallery of variable length) you'd need to have enough cells to map all the Horse properties. How can you do that with a custom type that isn't an array or dictionary?
In Swift, you can determine how many properties a Type has by creating a "Mirror" type and using it for introspection, to reflect info back to you like the count property missing above.
let horseMirror = reflect(self.horse)
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return self.horseMirror.count //should also return "5" but no longer hard-coded
}
And then in cellForRowAtIndexPath: you can switch on the indexPath to assign the various Horse properties to the labels (or images, etc) in the tableView cells. Create custom tableView cell types w/unique identifiers if you want to show different information, or stick w/built-in options:
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
var cell:UITableViewCell = self.tableView.dequeueReusableCellWithIdentifier("cell") as UITableViewCell
//haven't played w/this to see if the optionals are correct. Consider it psuedocode...
switch indexPath.row {
case 1: cell.textLabel.text = self.horse.name?
case 2: cell.textLabel.text = self.horse.gender?
case 3: cell.textLabel.text = self.horse.breed?
case 4: cell.textLabel.text = String(self.horse.age?)
case 5: cell.textLabel.text = String(self.horse.restingHeartRate?)
default: cell.textLabel.text = ""
}
return cell
}