Question

I am trying to add uipickerview in uiscrollview, but it is not being shown properly, just a black square.

Further, I have to add 1 more uipickerview, some labels and some buttons.

The code I am using is as under:

-(void)loadView {

    [super loadView];

    UIPickerView *pView = [[UIPickerView alloc] initWithFrame:CGRectMake(20, 20, 280, 165)];

    self.view.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"Background.png"]];
    scroller = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height)];
    scroller.pagingEnabled = YES;
    NSInteger numberOfViews = 2;
    for (int i = 0; i < numberOfViews; i++) {
        CGFloat yOrigin = i * self.view.frame.size.height;
        UIView *awesomeView = [[UIView alloc] initWithFrame:CGRectMake(yOrigin, 0, self.view.frame.size.width, self.view.frame.size.height)];
       // awesomeView.backgroundColor = [UIColor colorWithRed:0.5/i green:0.5 blue:0.5 alpha:1];
        [scroller addSubview:awesomeView];
        [scroller addSubview:pView];

    }
    scroller.contentSize = CGSizeMake(self.view.frame.size.width , self.view.frame.size.height * numberOfViews);
    [self.view addSubview:scroller];

}

what can be the issue?

Answer 1

Are you putting data in the picker view? I mean, if you just put the picker view without data on it you are not going to see anything on it.

You need to add the delegate and the datasource and put some data in your picker!

pView.delegate = self;
pView.datasource = self;

and then you have to implemente at least:

numberOfComponentsInPickerView:
numberOfRowsInComponent: 
titleForRow: