UISegmentedControl in iOS 7 - ios7

Question

I have a project with two segmented controls. They both worked up to iOS7.0. Now one does not. I've read of issues with tintColor, but I think this is something different.
Both controls use UIImages as segments. On one, the images all show correctly. On the other, I get all blue images.
Am I doing something wrong or is this a bug?
Here's the code of the faulty segment:
UISegmentedControl *colorControl = [[UISegmentedControl alloc] initWithItems:
[NSArray arrayWithObjects:
[UIImage imageNamed:#"White.png"],
[UIImage imageNamed:#"Red.png"],
[UIImage imageNamed:#"Yellow.png"],
[UIImage imageNamed:#"Green.png"],
[UIImage imageNamed:#"Blue.png"],
[UIImage imageNamed:#"Purple.png"],
[UIImage imageNamed:#"Black.png"], nil]];
CGRect frame = CGRectMake(rect.origin.x + kLeftMargin, rect.size.height - kPaletteHeight - kTopMargin, rect.size.width - (kLeftMargin + kRightMargin), kPaletteHeight );
colorControl.frame = frame;
// Add DoubleTap Color capability
gesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(showMoreColors:)];
[gesture setNumberOfTapsRequired:2];
[colorControl addGestureRecognizer:gesture];
// When the user chooses a color, the method changeColor: is called.
[colorControl addTarget:self action:#selector(changeColor:) forControlEvents:UIControlEventValueChanged];
// Make sure the color of the color complements the black background
//colorControl.tintColor = [UIColor clearColor];
// Add the control to the window
[self.view addSubview:colorControl];
While the images are all blue, the segments work as expected.

Answer 1

Thanks to this question, I formulated the following fix:
-(void) buildColorBar {
//NSLog(#"%s", __FUNCTION__);
UIImage *whiteImage = [UIImage imageNamed:#"White.png"];
UIImage *blackImage = [UIImage imageNamed:#"Black.png"];
UIImage *purpleImage = [UIImage imageNamed:#"Purple.png"];
UIImage *redImage = [UIImage imageNamed:#"Red.png"];
UIImage *blueImage = [UIImage imageNamed:#"Blue.png"];
UIImage *greenImage = [UIImage imageNamed:#"Green.png"];
UIImage *yellowImage = [UIImage imageNamed:#"Yellow.png"];
NSArray *colorArray = [[NSArray alloc] initWithObjects:
[whiteImage imageWithRenderingMode: UIImageRenderingModeAlwaysOriginal],
[redImage imageWithRenderingMode: UIImageRenderingModeAlwaysOriginal ],
[yellowImage imageWithRenderingMode: UIImageRenderingModeAlwaysOriginal ],
[greenImage imageWithRenderingMode: UIImageRenderingModeAlwaysOriginal ],
[blueImage imageWithRenderingMode: UIImageRenderingModeAlwaysOriginal ],
[purpleImage imageWithRenderingMode: UIImageRenderingModeAlwaysOriginal ],
[blackImage imageWithRenderingMode: UIImageRenderingModeAlwaysOriginal ], nil ];
UISegmentedControl *colorControl = [[UISegmentedControl alloc] initWithItems:colorArray];
CGRect frame = CGRectMake(rect.origin.x + kLeftMargin, rect.size.height - kPaletteHeight - kTopMargin, rect.size.width - (kLeftMargin + kRightMargin), kPaletteHeight );
colorControl.frame = frame;
I hope it helps someone else.