color balance on the iPhone
I am taking an image, loading it via the screen context, and changing it pixel by pixel. I have a number of different filters that I am applying to the images, but the last thing I need to do is shift the color balance (similar to Photoshop) to make the red more cyan. The code […]
Random color in iOS
I want to make my Navbar a different color each time its loaded. I have placed the following code in my viewDidApear: CGFloat hue = ( arc4random() % 256 / 256.0 ); // 0.0 to 1.0 CGFloat saturation = ( arc4random() % 128 / 256.0 ) + 0.5; // 0.5 to 1.0, away from white […]
Color wheel or color picker in iOS
How can I make a color wheel, color picker, or hue selector in iOS for use on the iPad. Here is an example picture of a color picker similar to what I want. @All Thanks in advance.
How to get Coordinates and PixelColor of TouchPoint in iOS/ObjectiveC
I need to get the Coordinates and PixelColor of a TouchPoint in Objective-C. Is this even possible? If yes I would be very interested in the how-to or any hint in the right direction. Thanx!!!
Detect color under mouse (Mac)
i’ve been searching the web for more than hours and didn’t find anything. I want to know how to get the color of the pixel where the mouse pointer currently is. I programmed a console application, so I have no window to overlay or something else. Just more detail: When I build&run the program ( […]
How can I colorize a black/white UIImageView programmatically?
I have a set of black and white images, like below. If I remember correctly, there’s some way to set the blending or masking property of a UIImage to blend it with the background UIView. In this case, I want to change the color of this image to red to signify hit points. How can […]
Taking an RGB color and normalizing it with UIColor on the iPhone
I’m looking for a straight forward way to convert a color from RGB, grabbing it from a tool like Photoshop, then convert it to a UIColor. Since UIColor uses normalized gamut of 0.0 to 1.0 for each color space, I’m not sure how this is done. Thanks for the solution.
Coloration of UIButtons of type UIButtonTypeRoundedRect
I would like the rounded rectangle portion of the subject type of UIButton to be a solid custom color I specify. I understand that . setTitleColor : changes the text color . backgroundColor : changes the color of the four pie-shaped corner pieces behind the rounded rectangle The question is how to change the color […]