Data not passing from one view controller to the other

App Development
#1

Hi, I am in the process of building a to-do app and am getting stuck. My first view controller displays a table view with tasks in each cell, and has an accessory button. When the button is clicked, a new view controller is displayed, with again a table view. The add button (a navigation bar item) once again opens a new view controller where the user can add in a task name, with an add button at the bottom. When the button is clicked the following code runs:

@IBAction func addAction(_ sender: Any) {
    if taskNameOutlet.text != "" {
           delegate?.addSubTask(nameOfSubTask: taskNameOutlet.text!)
           navigationController?.popViewController(animated: true)
        print(taskNameOutlet.text!)
    }
}

I use the protocol, which my view controller conforms to:

protocol AddSubTask {
//Changed the following two lines
func addSubTask(nameOfSubTask: String)
}

I then have the following code in the view controller:

func addSubTask(nameOfSubTask: String) {
    print("test")
    tableView.reloadData()
    
}

I want to add more in that chunk of code (e.g. tasks[indexPath].miniTaskArr.append(miniTask(name2: nameOfSubTask))), yet the string “test” isn’t even being printed to my console.

How do I fix this? I just want the add button to delegate the view controller to call the func addSubTask so I can append values into an array. Thanks, Annique

#2

Your viewcontroller layout seems complex. The first TVC lists the tasks. The third VC is an input screen for adding tasks. What does the second TVC list?

#3

It is very complex, and probably more complex than needed (I am very new to coding haha). So the first TVC displays the tasks (from a array called tasks, which are of type Task, correct. The third VC is an input screen, correct. The second TVC is for displaying the array of mini-tasks (each thing of type Task, which is displayed on TVC 1, has an array of mini tasks).

#4

It would be better to add your tasks, including subtasks, from your initial screen. You could place a bar button at the top left, with + symbol, and then have your input screen modally present itself. From that input screen the user would enter their task, and any sub-tasks, without having to navigate through to the third screen.

#5

That is very smart. I will try that, thank you!

#6

I’m a little bit confused about your issue with the action outlet not running. I’d have to look at your code itself I think and see how it relates to each viewcontroller. Try commenting all the code in your ibaction outlet and then have it call simple test function. Something like

func test() { print(“test”) }

and see if it gets called.

#7

I could send you my code if you want. What’s happening is basically that the IBaction works, but the delegate doesn’t. I followed your suggestion, putting a print statement in both the the IBAction of the button and the function that gets called because of a delegate, yet only the first one prints.