How do I add a UIPickerView when tapping inside a text field? - ios

Question

I have this code to add a datepicker:
// Initiate datepicker and assign to due date
_datePicker = [[UIDatePicker alloc] init];
[_datePicker addTarget:self action:#selector(dateChanged:)
forControlEvents:UIControlEventValueChanged];
_datePicker.minuteInterval = 15;
_dueDate.inputView = _datePicker;
I tried to do the same thing with a pickerview but I had no success, could somebody explain why?
Here is my code:
// Initaite the pickerview and assign to priority text field
_priorityPickerView = [[UIPickerView alloc] initWithFrame:CGRectMake(0, 200, 320, 200)];
// Array otions for priority picker
NSArray *array = [[NSArray alloc] initWithObjects:#"High",#"Medium",#"Low", nil];
self.priorityPickerData = array;
// Connect text field to pickerview
_priority.inputView = _priorityPickerView;
Here is the data set in the picker view:
// Picker View functions
-(NSInteger)numberOfComponantsInPickerView:(UIPickerView *)pickerView{
return 1;
}
-(NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component{
return [_priorityPickerData count];
}
-(NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component{
return [self.priorityPickerData objectAtIndex:row];
}
-(void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component{
int select = row;
if(select == 0){
_priority.text = #"High";
}else if(select == 1){
_priority.text = #"Medium";
}else if(select == 2){
_priority.text = #"Low";
}
}
Many thanks in advance,
Peter

Answer 1

Set the delegate and datasource to self:
_priorityPickerView.delegate = self;
_priorityPickerView.dataSource = self;
Also at the top of your .m file:
#interface YourViewController ()<UIPickerViewDataSource,UIPickerViewDelegate>