UIView内的UIScrollView

Question

I'm with a project in which I have a UIScrollView inside a UIView. Inside the UIScrollView has to see a list of buttons in 3 columns and X rows. I have the code that displays the buttons, but does not inserted into the UIScrollView, it prints over and does not scroll. Besides this, also cover the TabBar I have in the bottom of the view.

The code of the function that displais the buttons is

for (int y_axis=0; y_axis<=3; y_axis++)
    {
        for (int x_axis=0; x_axis<=2; x_axis++)
        {

            UIButton *btn=[[UIButton alloc] initWithFrame:CGRectMake(16+100*x_axis,100.0+115*y_axis,88.0 ,88.0)];
            btn.backgroundColor=[UIColor brownColor];
            [self.view addSubview:btn];

        }
    }

How can I do to display this in the UIScrollView? Thanks!!

Answer 1

Assuming you have a UIScrollView scroller, you have to change your last line to this;

[self.scroller addSubview:btn];

If not, you are adding it to the view, and not the scroller. Also, you have to change the scrollers contentsize, which is the X*Y if how much it contains. For it to contain the whole screen and nothing more;

[self.scroller setContentSize:CGSizeMake(320, 480)]
                                         ^     ^

Replace that with the width and the height you want to scroll. Each time you add a button below your new buttons, you should update the contentsize.

Answer 2

It's because you are adding buttons on view [self.view addSubview:btn]; not on ScrollView . Try to make a view with all you buttons. and set your view with buttons as contentview of your scrollview .

Answer 3

first you need the UIScrollViewDelegate in your .h file and then also check buttons are subview of yourScrollView or not also you add this button in your scrollview with code like this bellow...

[yourScrollView addSubview:yourbuttonname];

after that in your viewDidLoad method declare contentsize of your scrollview like this...

yourScrollView.contentSize=CGSizeMake(320, anyheight);///here define height which you want to scroll the view...

hope this help you.... :)

Answer 4

Try these steps:

    for loop
    {
        create buttons along with the desired frames;
        add those buttons to scrollview;
    }
    set the content size of the scrollview according to no of rows;
    add the scroll view to main view i.e. self.view;