I have a UIPickerView in my storyboard.
The UIViewController containing it has interface declarations set
@interface ContactDetail : UIViewController <ABPeoplePickerNavigationControllerDelegate, UIPickerViewDataSource, UIPickerViewDelegate,UIAlertViewDelegate, UITextFieldDelegate>
on view Load, pickerview delegation set
pickerView_RelationshipType.delegate = self;
pickerView_RelationshipType.showsSelectionIndicator = YES;
all UIPickerView datasource and delegate methods are triggered except those 2
those following are called, no problem
- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component
- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView
- (void)pickerView:(UIPickerView *)pickerView didSelectRow: (NSInteger)row inComponent:(NSInteger)component
- (CGFloat)pickerView:(UIPickerView *)pickerView widthForComponent:(NSInteger)component
numberOfRows returning 0, then your delegate method will never be called - the picker won't ask for the title of a row if it doesn't think it has any rows to display.
Make sure your data source array is allocated and initialized. I ran into this problem when everything was hooked up correctly (I set the data source and delegates and was conforming to the protocols), but I forgot to initialize my data source arrays before adding objects to them. My code was hitting
numberOfRowsInComponent but not
titleForRow and I couldn't figure out why. Make sure your data source is not returning nil.
Kind of a stupid edge case, but I figured I'd add my answer in case someone else runs into the same issue.