UIPickerView not scrolling - objective-c

Question

here is my code, I used Google map and UIPickerView:
-(void)loadView
{
GMSCameraPosition *camera = [GMSCameraPosition cameraWithLatitude:-33.86 longitude:151.20 zoom:14];
mapViewCustomer = [GMSMapView mapWithFrame:CGRectZero camera:camera];
mapViewCustomer.myLocationEnabled = YES;
// mapView_ = [[GMSMapView alloc]initWithFrame:CGRectMake(0, 45, self.view.frame.size.width, self.view.frame.size.height)];
// [self.view addSubview:mapView_];
self.view = mapViewCustomer;
GMSMarker *marker = [[GMSMarker alloc] init];
marker.position = CLLocationCoordinate2DMake(-33.86, 151.20);
marker.title = #"My location";
;
marker.map = mapViewCustomer;
[marker setIcon:[UIImage imageNamed:#"location1.png"]];
}
and I have a UIPickerView in viewDidLoad, I tried put it on viewWillDisappear or viewWillApear but it doesn't work:
- (void)viewDidLoad
{
pickerViewCustomer = [[UIPickerView alloc] initWithFrame:CGRectMake(0.0, 162.0, 320.0, 120.0)];
//[pickerViewCustomer setFrame:CGRectMake(0.0, 162.0, 320.0, 120.0)];
pickerViewCustomer.hidden = YES;
pickerViewCustomer.delegate = self;
pickerViewCustomer.dataSource = self;
pickerViewCustomer.userInteractionEnabled = NO;
arrayDistanceFilters = [[NSArray alloc] initWithObjects:#"5km",#"10km",#"50km",#"100km",#"100km",#"100km",#"100km",#"100km",#"100km",#"100km", nil];
arrayDistanceValues = [[NSArray alloc] initWithObjects:[NSNumber numberWithFloat:5], [NSNumber numberWithFloat:10],[NSNumber numberWithFloat:50], [NSNumber numberWithFloat:100], nil];
[pickerViewCustomer selectRow:1 inComponent:0 animated:NO];
[pickerViewCustomer reloadAllComponents];
[self.view addSubview:pickerViewCustomer];
}
delegate and data source
- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView{
return 1;
}
- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component{
return [arrayDistanceFilters count];
}
- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component{
return [arrayDistanceFilters objectAtIndex:row];
}
- (CGFloat)pickerView:(UIPickerView *)pickerView rowHeightForComponent:(NSInteger)component{
return 40;
}
- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component{
}
But scrolling does not work. What is wrong with my code?

Answer 1

try an other position on the view...
I had also a picker, which wasnt scrolling,too, then i moved the position(in the storyboard) of the picker and it worked...
to switch off autolayout helped also!
not satisfying, but a solution...

Answer 2

Please check this working example for more details
working tutorial