UIPickerView: Is it possible to show the previous selected value in the UIPicker view?

Question

For ex: scrolled the pickervirew and selected "2" from the list and on opening the picker for the second time the values in the picker view should show as "2".

In PickerView Delegate: "Selected" delegate function is available to get the selected value. But not able to set the selected value in the picker view

Answer 1

Hello,

You can set the selected value by UIPickerView.Select(nint, nint, Boolean) Method, please refer to the following code: Adding a selected method in the custom UIPickerView

public void DefultSelect(string selectedYear, string selectedMonth)
        {
            if (this.SelectedYear != null && this.SelectedMonth != null)
            {
                var yearIndex = yearArray.IndexOf(selectedYear);
                var monthIndex = monthArray.IndexOf(selectedMonth);
                PickerViewDelegate pickerDelegate = (PickerViewDelegate)this.Delegate;
                this.Select(yearIndex, 0, true);
                this.Select(monthIndex, 1, true);
            }
        }

Calling this method in a ViewController for testing

 clickbutton.TouchUpInside += delegate
            {
                //get the selected year and month
                customLabel.Text = customPicker.SelectedYear +"-" + customPicker.SelectedMonth;
                customPicker.Hidden = true;
            };

Setting the default selected value

checkSelectbutton.TouchUpInside += delegate
            {
                customPicker.Hidden = false;
                string[] words = customLabel.Text.Split('-');
                string defaultYear = words[0];
                string defaultMonth = words[1];
                customPicker.DefultSelect(defaultYear, defaultMonth);// set the value, I get the selected value from the Label, you can store the value (and get the value) according to your needs
            };

Best Regards, Wenyan Zhang

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