My custom UIView not being displayed on screen - ios

Question

I created a custom UIView to hold a picker view and a nav bar with a couple of buttons. I also created a custom nib with the nav bar, 2 buttons and the picker, all of which are linked to my header file. I made it a delegate for each individual class to handle all of the picker view delegates. My problem is that it wont display on screen when needed. I know the method gets called but the custom view wont appear. Below is my code.
CustomPicker.m:
- (IBAction)selectClick:(id)sender
{
NSObject *obj = [self.list objectAtIndex:[self.picker selectedRowInComponent:0]];
[self.delegate pickerDidSelect:obj];
}
- (IBAction)selectCancel:(id)sender
{
[self.delegate removePickerFromView:self];
}
- (id)initWithFrame:(CGRect)frame
{
frame.size = CGSizeMake(320, 260);
self = [super initWithFrame:frame];
if (self) {
// Initialization code
}
self.picker = [[UIPickerView alloc] init];
self.picker.dataSource = self;
self.picker.delegate = self;
self.picker.showsSelectionIndicator = YES;
return self;
}
-(NSInteger) numberOfComponentsInPickerView:(UIPickerView *)pickerView
{
return [self.delegate numberOfComponentsInPicker:pickerView];
}
-(NSInteger) pickerView: (UIPickerView *) pickerView numberOfRowsInComponent:(NSInteger)component
{
return [self.delegate picker:pickerView numberOfRowsInComponent:component];
}
-(NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component
{
return [self.delegate picker:pickerView titleForRow:row forComponent:component];
}
Method called to display
-(void)displayPicker
{
NSLog(#"display picker");
picker = [[CustomPicker alloc] initWithFrame:CGRectMake(0, self.view.frame.size.height, 320, 260)];
#warning picker set up incomplete
[self.view addSubview:picker];
CGRect frame = picker.frame;
frame.origin = CGPointMake(0, self.view.frame.size.height - 260);
[UIView animateWithDuration:1.5 animations:^{
[picker setFrame:frame];
}];
}
Now, I just dont get why my custom view isnt being displayed.
Thanks!

Answer 1

The implementation of your CustomPicker class does not add any subviews to itself. Your custom picker view is properly being added and displayed but it is empty so there is nothing to see.
Update the initWithFrame: method of CustomPicker to add self.picker to self.
[self addSubview:self.picker];
BTW - your code to create and setup the UIPickerView should be done inside the if statement. You don't want to run that code if self is nil.
- (id)initWithFrame:(CGRect)frame
{
frame.size = CGSizeMake(320, 260);
self = [super initWithFrame:frame];
if (self) {
self.picker = [[UIPickerView alloc] init];
self.picker.dataSource = self;
self.picker.delegate = self;
self.picker.showsSelectionIndicator = YES;
[self addSubview:self.picker];
}
return self;
}