Accessibility - UIPickerView as inputView

I'm using a UIPickerView as an inputView of UITextField.

self.pickerView = [[UIPickerView alloc]initWithFrame:CGRectZero];

self.pickerView.dataSource = self.datasource;
self.pickerView.delegate = self.delegate;

self.pickerView.showsSelectionIndicator = YES;
self.pickerView.backgroundColor = [UIColor whiteColor];
self.textField.inputView = self.pickerView;

Everything works fine, but when i active voiceover and start to cycling through the itens, the voiceover start to make incorrect announcement.

I did some research and I found a repo on github with someone that have the same problem, but i couldn't find any solution.