UIPickerView selection indicator not visible in iOS10

Question

I build my project in Xcode 8. UIPickerView separator lines are not visible in iOS 10 simulator and the devices, but works fine on iOS 9.3 devices and simulator. I tried to adju

Answer 1

I had this exact issue when I rebuilt a couple of solutions for iOS10 and deployed to iOS10 on both simulators and devices.

I narrowed the problem in my case to be down to selecting an item in the picker during initialisation. ie. I populate my picker and if we have already got a selection for this property then I preselect it and the lines are present. I do this during the initialisation when I set up my picker.

So my fix, which worked in my use case, was to select the 0 element in the case of no existing value.

Objective-C

UIPickerView *pickerView;

...

[pickerView selectRow:0 inComponent:0 animated:YES];

Swift

let pickerView: UIPickerView

...

pickerView.selectRow(0, inComponent: 0, animated: true)

This was fine for my solution since I effectively select row zero on setup.

I haven't had chance to dig into the reasoning or look for a cleaner solution, but since I've solved my problem I thought I'd share it here to help you all out if I can.