Question

I have this code:

//Value of userCount is 25
auxCount = 0;
for (int y_axis=0; y_axis<=8; y_axis++)  //ROWS
    {
        for (int x_axis=0; x_axis<=2; x_axis++) //COLUMNS
        {
            if (auxCount<userCount) {     
                NSLog(@"auxCount: %i\n",auxCount);
                NSLog(@"userCount: %i\n\n",userCount);
                UIButton *btn=       [[UIButton alloc] initWithFrame:CGRectMake(16+100*x_axis,115.0*y_axis,88.0 ,88.0)];
                UILabel *userLabel = [[UILabel alloc] initWithFrame:CGRectMake(16+100*x_axis,90+115.0*y_axis, 88.0, 15.0)];
                userLabel.textAlignment = UITextAlignmentCenter;
                userLabel.text = mensaje;

                btn.backgroundColor=[UIColor groupTableViewBackgroundColor];
                [scrollViewUsers addSubview:btn];
                [scrollViewUsers addSubview:userLabel];

                auxCount++;

            }
        }
    }

With this I want a matrix with 3 columns and X rows, but only displays 3 rows and the third row only displays 1 button. And in Debug area appears:
auxCount: 0
userCount: 25

auxCount: 4
userCount: 25

auxCount: 8
userCount: 25

auxCount: 12
userCount: 25

auxCount: 16
userCount: 25

auxCount: 20
userCount: 25

auxCount: 24
userCount: 25

auxCount increments by 4 by 4. I think that is because the if instructions are executed only by the first for loop but I don’t know why.
Please, I need your help.

ps: sorry for my english!!

Answer 1

just try this for loops as i have used in my app it worked for me.

to find out the number of rows depending on number of columns and total count

int r;
float rem = [dao libraryCount] % kCol;
if(rem == 0.0f)
    r = floor([dao libraryCount]/kD);
else
    r = ceil([dao libraryCount]/kD);

here r is for number if row [dao libraryCount is total number of items and kCol is fix number of column for you it is 3 and kD is same as kCol only deference is it is type of float ie 3.0 in your case

then use the for loop as below

for (int row = 0; row < r; ++row)
{
    for (int col = 0; col < kCol; ++col)
    {
       //Your Code to display or any thing
    }
}

for auxCount use this code

int index = (row * kCol) + col;
        if(index < [dao libraryCount])
        {
            //Your Code to display or any thing
        }

put this in side both for loop instead of using ++
just change the both for loops and replace if condition with appropriate variables

Enjoy Coding 🙂
And Good Luck

any help is needed just comment me i will love to help you