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2014/10/15 ¤U¤È 10:05:00

iphone Programming Glossary: cgcolorgetcomponents

How would I tint an image programatically on the iPhone?

http://stackoverflow.com/questions/1117211/how-would-i-tint-an-image-programatically-on-the-iphone

UIView void drawRect CGRect rect CGContextRef context UIGraphicsGetCurrentContext CGContextSetFillColor context CGColorGetComponents UIColor colorWithRed 0.5 green 0.5 blue 0 alpha 1 .CGColor don't make color too saturated CGContextFillRect context rect.. filled rectangle over top of image. CGContextSetBlendMode context kCGBlendModeMultiply CGContextSetFillColor context CGColorGetComponents self.overlayColor.CGColor CGContextFillRect context self.bounds CGContextRestoreGState context Ordinarily to optimize the..

Check if UIColor is dark or bright?

http://stackoverflow.com/questions/2509443/check-if-uicolor-is-dark-or-bright

to everyone's suggestions here's the working code void updateColor UIColor newColor const CGFloat componentColors CGColorGetComponents newColor.CGColor CGFloat colorBrightness componentColors 0 299 componentColors 1 587 componentColors 2 114 1000 if colorBrightness..

Curve text on existing circle

http://stackoverflow.com/questions/3841642/curve-text-on-existing-circle

fontName char self.menuItemsFont.fontName cStringUsingEncoding NSASCIIStringEncoding CGFloat ringColorComponents float CGColorGetComponents ringColor.CGColor CGFloat textColorComponents float CGColorGetComponents textColor.CGColor CGColorSpaceRef colorSpace CGColorSpaceCreateDeviceRGB.. CGFloat ringColorComponents float CGColorGetComponents ringColor.CGColor CGFloat textColorComponents float CGColorGetComponents textColor.CGColor CGColorSpaceRef colorSpace CGColorSpaceCreateDeviceRGB CGContextRef context CGBitmapContextCreate NULL..

Change background color of UIButton when Highlighted

http://stackoverflow.com/questions/4022763/change-background-color-of-uibutton-when-highlighted

UIGraphicsGetCurrentContext CGColorSpaceRef rgb CGColorSpaceCreateDeviceRGB const CGFloat topGradientColorComponents CGColorGetComponents UIColor whiteColor .CGColor const CGFloat bottomGradientColorComponents CGColorGetComponents UIColor blackColor .CGColor.. CGColorGetComponents UIColor whiteColor .CGColor const CGFloat bottomGradientColorComponents CGColorGetComponents UIColor blackColor .CGColor CGFloat colors topGradientColorComponents 0 topGradientColorComponents 1 topGradientColorComponents..

How to get RGB values from UIColor?

http://stackoverflow.com/questions/437113/how-to-get-rgb-values-from-uicolor

RGB values from the created color object iphone rgb uicolor share improve this question const float colors CGColorGetComponents curView.backgroundColor.CGColor These links provide further details UIColor Reference CGColorGetComponents reference share..

Get RGB value from UIColor presets

http://stackoverflow.com/questions/4700168/get-rgb-value-from-uicolor-presets

predefined values like UIColor grayColor UIColor redColor . I know that I can use following code const CGFloat c CGColorGetComponents color.CGColor but only for colors that are in RBG color space however UIColor grayColor is not. Is there any way to get..

Remove Gradient on UINavigationBar

http://stackoverflow.com/questions/4904877/remove-gradient-on-uinavigationbar

Recreate recipient bubble behaviour in Mail.app / Three20

http://stackoverflow.com/questions/5247072/recreate-recipient-bubble-behaviour-in-mail-app-three20

badgeBounds.origin.y badgeBounds.size.width capDiameter capDiameter if self.textColor nil const CGFloat colors CGColorGetComponents self.textColor.CGColor CGColorSpaceRef space CGColorGetColorSpace self.textColor.CGColor CGColorSpaceModel model CGColorSpaceGetModel..

How do i get the hue, saturation and brightness from a UIColor?

http://stackoverflow.com/questions/5284427/how-do-i-get-the-hue-saturation-and-brightness-from-a-uicolor

p g q b v break case 4 r t g p b v break default case 5 r v g p b q break ... CGFloat r g b a h s v const CGFloat comp CGColorGetComponents myUIColor CGColor r comp 0 g comp 1 b comp 2 a comp 3 RGBtoHSV r g b h s v The code above assumes the UIColor is setup in..

Change from RGB to HSB on iPhone?

http://stackoverflow.com/questions/5589804/change-from-rgb-to-hsb-on-iphone

Extracting rgb from UIColor [duplicate]

http://stackoverflow.com/questions/816828/extracting-rgb-from-uicolor

values from UIColor 4 answers Seen this asked before but my example does not seem to work. const CGFloat toCol CGColorGetComponents UIColor greenColor CGColor The array is empty from looking at it with GDB. Any hints iphone core graphics uicolor cgcolor.. color uicolor CGColor int numComponents CGColorGetNumberOfComponents color if numComponents 4 const CGFloat components CGColorGetComponents color CGFloat red components 0 CGFloat green components 1 CGFloat blue components 2 CGFloat alpha components 3 uicolor release..