Here are some snippets I coded and I would like some feedback on my way of handling this  :

I have a utility class, as a singleton, that provides me with a method named randomColor which returns a (UIColor*)  :

-(UIColor*)randomColor
{
    float l_fRandomRedColor = [[MathUtility instance] randomFloatNumberBetweenNumber:0.0f AndNumber:1.0f];
    float l_fRandomBlueColor = [[MathUtility instance] randomFloatNumberBetweenNumber:0.0f AndNumber:1.0f];
    float l_fRandomGreenColor = [[MathUtility instance] randomFloatNumberBetweenNumber:0.0f AndNumber:1.0f];
    
    return [UIColor colorWithRed:l_fRandomRedColor
                    green: l_fRandomGreenColor
                    blue: l_fRandomBlueColor
                           alpha: 255];
}

Now, I know the object return by this method is autoreleased.

I store the returned value in another class and I would like to keep this value for a while, so I proceed like this  :

[self setMpCurrentPieceColor:[[GraphicsUtility instance] randomColor]];

Which calls the following property  :

- (void)setMpCurrentPieceColor:(UIColor*)_newColor
{
    [_mpCurrentPieceColor release];
    [_newColor retain];
    
    // Make the new assignment.
    _mpCurrentPieceColor = _newColor;
}

Question A)

My instance variable is released in the dealloc method. Is a the correct way to go  ?

Question B)

Now, let's imagine I have an array, like this  :

UIColor* mBoardColors[WIDTH][HEIGHT];

I want to store the previous instance variable into the array  :

[mBoardColors[l_iBoardXIndex][l_iBoardYIndex] release];
[_color retain];
mBoardColors[l_iBoardXIndex][l_iBoardYIndex] = _color;

Is it correct  ?

Question C)

What if I want to move a color from a cell to another (moving, not copying), is it correct to do it like that  ?

[mBoardColors[l_iBoardXIndex][l_iBoardYIndex] release];
mBoardColors[l_iBoardXIndex][l_iBoardYIndex] = mBoardColors[l_iBoardXIndex][l_iBoardYIndex - 1];
mBoardColors[l_iBoardXIndex][l_iBoardYIndex - 1] = nil;

Thank in advance for your precious comments and advices  !

Here are some snippets I coded and I would like some feedback on my way of handling this:

I have a utility class, as a singleton, that provides me with a method named randomColor which returns a (UIColor*):

-(UIColor*)randomColor
{
    float l_fRandomRedColor = [[MathUtility instance] randomFloatNumberBetweenNumber:0.0f AndNumber:1.0f];
    float l_fRandomBlueColor = [[MathUtility instance] randomFloatNumberBetweenNumber:0.0f AndNumber:1.0f];
    float l_fRandomGreenColor = [[MathUtility instance] randomFloatNumberBetweenNumber:0.0f AndNumber:1.0f];
    
    return [UIColor colorWithRed:l_fRandomRedColor
                    green: l_fRandomGreenColor
                    blue: l_fRandomBlueColor
                           alpha: 255];
}

Now, I know the object return by this method is autoreleased.

I store the returned value in another class and I would like to keep this value for a while, so I proceed like this:

[self setMpCurrentPieceColor:[[GraphicsUtility instance] randomColor]];

Which calls the following property:

- (void)setMpCurrentPieceColor:(UIColor*)_newColor
{
    [_mpCurrentPieceColor release];
    [_newColor retain];
    
    // Make the new assignment.
    _mpCurrentPieceColor = _newColor;
}

Question A)

My instance variable is released in the dealloc method. Is a the correct way to go?

Question B)

Now, let's imagine I have an array, like this:

UIColor* mBoardColors[WIDTH][HEIGHT];

I want to store the previous instance variable into the array:

[mBoardColors[l_iBoardXIndex][l_iBoardYIndex] release];
[_color retain];
mBoardColors[l_iBoardXIndex][l_iBoardYIndex] = _color;

Is it correct?

Question C)

What if I want to move a color from a cell to another (moving, not copying), is it correct to do it like that?

[mBoardColors[l_iBoardXIndex][l_iBoardYIndex] release];
mBoardColors[l_iBoardXIndex][l_iBoardYIndex] = mBoardColors[l_iBoardXIndex][l_iBoardYIndex - 1];
mBoardColors[l_iBoardXIndex][l_iBoardYIndex - 1] = nil;

Thank in advance for your precious comments and advices!