How to reload UIView after closing UIAlertController - swift

Question

I try to make BarChart using https://github.com/CoreCharts/CoreCharts I have a button, which call UIAlertController with textField.
After I click submit button, new data is added to the array. I need the diagram to reboot.
#IBAction func newWeightButton(_ sender: Any) {
//updateGraph()
let alert = UIAlertController(title: "Enter your new weight", message: nil, preferredStyle: .alert)
alert.addTextField()
let submitAction = UIAlertAction(title: "Add", style: .default) { [unowned alert] _ in
let textField = alert.textFields![0]
textField.keyboardType = UIKeyboardType.numberPad
textField.becomeFirstResponder()
let answer = Double(textField.text!)
self.weightArr.append(answer!)
print(self.weightArr)
self.loadCoreChartData()
}
alert.addAction(submitAction)
present(alert, animated: true)
}
func loadCoreChartData() -> [CoreChartEntry] {
return getWeightList()
}
func getWeightList()->[CoreChartEntry] {
var allResults = [CoreChartEntry]()
//let days = ["Mon","Tue","Wed","Thur","Fri"]
let plateNumber = [80,75,90,88,84]
var count = self.weightArr.count
for index in 0..<count {
let newEntry = CoreChartEntry(id: "\(self.weightArr[index])",
barTitle: "Day",
barHeight: Double(self.weightArr[index]),
barColor: UIColor(red: 0, green: 122/255, blue: 1, alpha: 1))
allResults.append(newEntry)
}

Answer 1

For CoreCharts, call reload() on the chart.
Generally, in iOS, setting properties of the UIView is sufficient to get it to update, but with views that use a datasource of some type (like tables, collection views, and core charts), there is usually some kind of reload...() function to tell the view that the datasource changed.