Can I programmatically scroll to a desired row in UIPickerView?

Question!

By default the first row is highlighted after initializing the UIPickerView. How do i highlight a particular row or scroll to particular row programmatically?

By : pradeepa


Answers

Working in iOS 9 with XCode 7.3, to make runtime changes to data in a picker view called fieldPicker:

// first load your new data to your picker view's data source (not shown here...) then load the data into the picker view using it's delegate
    [self.fieldPicker reloadAllComponents];

    // now that the data is loaded, select a row in the picker view through it's delegate
    [self.fieldPicker selectRow:([self.theFields count] - 1) inComponent:0 animated:NO];

// retrieve the row selected in the picker view to use in setting data from your data source in textboxes etc.
    long row = (long)[self.fieldPicker selectedRowInComponent: 0];
By : Spanky


If you want to trigger delegate's method pickerView:didSelectRow:inComponent, you should call it manually:

Obj-C

[self.myPickerView selectRow:0 inComponent:0 animated:NO];
[self pickerView:self.myPickerView didSelectRow:4 inComponent:0];

Swift

self.myPickerView.selectRow(0, inComponent: 0, animated: false)
self.pickerView(self.myPickerView, didSelectRow: 0, inComponent: 0)


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By: admin