Set value to UIPickerView row error iOS - ios

Question

When i click the button, pickerview coming up and i am choosing a city from there. And if i click again i want to get what i selected before.
Here is my code,
-(void)cityButtonPressed{
actionSheet = [[UIActionSheet alloc] initWithTitle:nil
delegate:nil
cancelButtonTitle:nil
destructiveButtonTitle:nil
otherButtonTitles:nil];
[actionSheet setActionSheetStyle:UIActionSheetStyleBlackTranslucent];
CGRect pickerFrame = CGRectMake(0, 30, 0, 0);
pickerView = [[UIPickerView alloc] initWithFrame:pickerFrame];
pickerView.showsSelectionIndicator = YES;
NSLog(#"selectedPickerView = %i",selectedPickerView);
[pickerView selectRow:selectedPickerView inComponent:0 animated:NO];// this line is not working
pickerView.dataSource = self;
pickerView.delegate = self;
[actionSheet addSubview:pickerView];
NSString *done = #"Done";
closeButton = [[UISegmentedControl alloc] initWithItems:[NSArray arrayWithObject:done]];
closeButton.momentary = YES;
closeButton.frame = CGRectMake(260, 10, 50.0f, 30.0f);
closeButton.segmentedControlStyle = UISegmentedControlStyleBar;
closeButton.tintColor = [UIColor greenColor];
[closeButton addTarget:self action:#selector(dismissActionSheet:) forControlEvents:UIControlEventValueChanged];
[actionSheet addSubview:closeButton];
[actionSheet showInView:[[UIApplication sharedApplication] keyWindow]];
[actionSheet setBounds:CGRectMake(0, 0, 320, 500)];
[pickerView reloadAllComponents];
}
- (void)pickerView:(UIPickerView *)pickerView didSelectRow: (NSInteger)row inComponent:(NSInteger)component {
// Handle the selection
[cityButton setTitle:[cities objectAtIndex:row] forState:UIControlStateNormal];
if (row == 0) {
[cityButton setTitleColor:[UIColor lightGrayColor] forState:UIControlStateNormal];
}else{
[cityButton setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
}
selectedPickerView = row;
}
What am i doing wrong here.
And one more question. When i click the button,this error is coming.
<Error>: CGContextRestoreGState: invalid context 0x0. This is a serious error. This application, or a library it uses, is using an invalid context and is thereby contributing to an overall degradation of system stability and reliability. This notice is a courtesy: please fix this problem. It will become a fatal error in an upcoming update.
I am wondering, is it not working because of this error?

Answer 1

You're creating an action sheet with no title or buttons? Ugh. Then you're adding a segmented control as a tappable button? Double ugh Apple will likely reject an app that uses a segmented control as a button.
As to your specific problem, I'm not sure if you can change the selected component in a picker view before it's on-screen. What happens if you move your selectRow:inComponent:animated: call down to after displaying the action sheet? You should probably also get rid of the reload call on your picker view, since it will load it's data when it's displayed.