CODEWITHSUNDEEP
iosxcodeuitableviewswift
4thSpace
4thSpace

Reputation: 44310

Tableview not loading/triggering

I have the following single view app. The tablview delegate/datasource are connected to the Root View Controller through IB. When the app loads, the tableview is empty. I've set a breakpoint in all methods of the ViewController.swift file and nothing is hit.

enter image description here

I have added the following in ViewController.swift (UITableViewDataSource is also there now):

UITableViewDelegate

func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
    let cell:UITableViewCell = UITableViewCell(style: UITableViewCellStyle.Default, reuseIdentifier: "test")
    cell.textLabel?.text = "just a cell"
    return cell;
}


func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return 3
}

Since no breakpoints are getting hit in ViewController.swift, I think something is still not connected. Any ideas what this might be or what I'm doing wrong?

The project has just the stock Single View app files:

enter image description here

-- EDIT --

Cell identifier updated but still no data in the table.

enter image description here

Below is the connection from the tableveiw to the Root View Controller.

enter image description here

Upvotes: 0

Views: 1850

Answers (3)

mluisbrown
mluisbrown

Reputation: 14918

Looks like you have 2 problems:

1. ViewController class not correctly assigned in IB

When your Root View Controller is selected, what appears here in the right hand pane? It should be ViewController (the name of your ViewController class) like this:

enter image description here

Note that IB won't let you select a class which is not a UITableViewController subclass. If you have an empty Storyboard and drag out a Navigation Controller, the Root View Controller it creates is a Table View Controller, and it will only let you associate that with a UITableViewController subclass. If you really don't want to use a UITableViewController you have to delete the Root View Controller that IB created for you, drag out a regular View Controller, add in the Table View and then hook everything up as necessary by hand.

2. Outlets not correctly wired up

The way you've hooked up the outlets doesn't look right. The UITableView should have outlets dataSource and delegate referencing the RootViewController. Like this:

enter image description here

Whereas the RootViewContoller should have referencing outlets dataSource and delegate referencing the Table View.

From the the crash you're getting ([UINavigationItem tableView:numberOfRowsInSection:]: unrecognized selector sent to instance) it's clear that you have hooked up the dataSource and delegate to the navigation bar, not the View Controller (the yellow circle Storyboard hierarchy view).

Upvotes: 2

Matthias Bauch
Matthias Bauch

Reputation: 90117

As you can see in the cell inspector the style of your prototype cell is "Custom". Such a cell does not have a textLabel. Switch the style to Default and you will get a UITableViewCell that has a textLabel.

And since it's obviously an error if there is no textLabel you should replace textLabel? with textLabel!: 

func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
    let cell:UITableViewCell = UITableViewCell(style: UITableViewCellStyle.Default, reuseIdentifier: "test")
    cell.textLabel!.text = "just a cell"
    return cell;
}

Upvotes: 0

Michal
Michal

Reputation: 15669

Check the Identifier in Storyboard - it should say test where I have switchCell. You'll find it in the bar on the right side by clicking on the prototype cell:

enter image description here

Upvotes: 0

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