Change the hue to any value between 0.0 and 1.0 and you will get a different background color. If you build and run this small app, you will have a red background. The rest of the colors of the RGB color wheel or color star are equally spaced apart from each other. Just like the RGBA initializer we learned in part one UIColor has an initializer for HSBA, where A is alpha. In the code, change viewDidLoad to the following: Go to the FirstViewController.swift file.
#XCODE COLORSET UPDATE#
In the pin menu set the label to so we have 0 left, 0 right and 30 bottom, Update frame with Items of new constraints: With the label still selected, cick open the resolver menu. Delete the smaller text label Leaving View two. Press return.Using Autolayout, We constrained the button to the view. Holding down the shift key, Click Vertical Spacing and Center Horizontally. When the text highlights, release the mouse button. Control-Drag from the button to the label with the smaller text. In the First View, drag a button centered under the two existing labels. This sets up two view controllers FirstView and SecondView connected by a tab bar controller.
Name it SwiftHSBColorDemo.with Swift as the language. Create a new project in Xcode using the Tabbed Application template. We’re going to make two projects in one app using the Tab Bar controller template. A Two Part Color AppĪfter all this theory, it’s time for a little coding for color. Apple added orangeColor and purpleColor to help with those who want a six color RYB palette, but purple is really magenta with a 50% brightness, not a pure hue. If you use RYB, you have to figure out your palette first and specify the numbers manually. Though I can’t find research on it, I believe younger people who learned their colors on iPads and the web where coloring programs use RGB will have a different sense of color than those of us who are older, since we grew up with finger paints and crayons which are RYB based.Įven though RYB looks better to most people, RYB doesn’t exist in any form in Xcode.
#XCODE COLORSET MAC#
It may also have to do with color transmitted as light, as in my iPhone and Mac Air, and reflected light, like my paint. Much of color is subjective, so you may have different results with different people, but many people prefer the RYB colors, particularly for matching. The color star with variations of hue, saturation and brightness might look like this: The system colors look like this: RYB color set You get a different set of primary and secondary colors if you use RYB instead of RGB. Color psychology, and almost any art student from pre-school to graduate school will tell you the primary colors are red, yellow and blue. According to physics, the three primary colors are red, green and blue. Why are orangeColor and purpleColor Apple system colors? There is another way of looking at color, but it does not work easily on computer systems. Some examples of saturation and brightness changes might look like this on our color wheel, which becomes more of a star: Color Star with saturation change and brightness change.
#XCODE COLORSET FULL#
At full saturation and full brightness, a color is what we will call a pure hue. Brightness is a scale from white to black in a color. Saturation is a scale from a full hue to gray with no hue. After magenta, color becomes more red so that we are back to red again, making a wheel of colors: RGB Color Wheel by Hueīesides hue, there are two more settings: saturation and brightness. Hue assigns numbers to every color in the rainbow in order of the spectrum: in terms of our RGB system colors, that spectrum is red, yellow, green, cyan, blue and magenta. Unlike RGB, HSB is based primarily on hue.
#XCODE COLORSET SERIES#
Sometimes we want to make a series of related colors, such as a rainbow, and RGB makes this near impossible to do programmatically. Beyond a few easy cases, it becomes very difficult to match colors to make a good palettes for user interfaces. In Swift the key initializer for a RGB color is UIColor(red:,green:,blue:,alpha:). It is a very popular color space to communicate and specify color since it uses a very easy numbering system to make up millions of colors. In our last post we discussed the RGB color space which uses red green and blue to create color.
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