UIMonthYearPicker is a UIPickerView subclass that allows you select date from month and year only, no days.

• Place a UIPickerView object in the storyboard or XIB editor. Rename class to UIMonthYearPicker. or Create an instance of the UIMonthYearPicker manually.

• Implement UIMonthYearPickerDelegate protocol

- (void)viewDidLoad
{
    [super viewDidLoad];
    datePicker._delegate = self;
}

- (void) pickerView:(UIPickerView *)pickerView didChangeDate:(NSDate *)newDate {
}

base on the souce code by Igor Fedorchuk https://stackoverflow.com/questions/3348247/uidatepicker-select-month-and-year