2014/10/15 下午 10:05:00

iphone Programming Glossary: cgcontextclearrect

http://stackoverflow.com/questions/1767401/animating-a-shape-with-coreanimation

CGRect rect float cp1y 230.0f float cp2x 100.0f float cp2y 120.0f CGContextRef ctx UIGraphicsGetCurrentContext CGContextClearRect ctx rect CGMutablePathRef path CGPathCreateMutable CGPathMoveToPoint path NULL 10.0f 200.0f CGPathAddCurveToPoint path NULL..

Setting A CGContext Transparent Background

http://stackoverflow.com/questions/2125543/setting-a-cgcontext-transparent-background

graphics background transparent cgcontext share improve this question After UIGraphicsGetCurrentContext call CGContextClearRect context rect Edit Alright got it. Your custom view with the line should have the following id initWithFrame CGRect frame.. UIColor clearColor return self void drawRect CGRect rect CGContextRef context UIGraphicsGetCurrentContext CGContextClearRect context rect CGContextSetStrokeColorWithColor context UIColor whiteColor .CGColor CGContextSetLineWidth context 5.0 CGContextMoveToPoint..

How do I add an outer glow to a UIImage or UIImageView or UIView

http://stackoverflow.com/questions/2278440/how-do-i-add-an-outer-glow-to-a-uiimage-or-uiimageview-or-uiview

newSize CGContextRef ctx UIGraphicsGetCurrentContext CGContextBeginTransparencyLayerWithRect ctx newSize NULL CGContextClearRect ctx newSize you can repeat this process to build glow. CGContextDrawImage ctx newSize theImage CGContextSetAlpha ctx 0.2..

Are there any standard way to implement the “blue badge” in iPhone?

http://stackoverflow.com/questions/258375/are-there-any-standard-way-to-implement-the-blue-badge-in-iphone

float radius bounds.size.height 2.0 NSString countString NSString stringWithFormat @ d count CGContextClearRect context bounds CGContextSetFillColorWithColor context ovalColor CGContextBeginPath context CGContextAddArc context radius..

OpenGL ES (IPhone) alpha blending looks weird

http://stackoverflow.com/questions/4012035/opengl-es-iphone-alpha-blending-looks-weird

height 8 4 width colorSpace kCGImageAlphaPremultipliedLast kCGBitmapByteOrder32Big CGColorSpaceRelease colorSpace CGContextClearRect context CGRectMake 0 0 width height CGContextTranslateCTM context 0 height height CGContextDrawImage context CGRectMake..

CoreGraphics for retina display

http://stackoverflow.com/questions/4707465/coregraphics-for-retina-display

CGContextRef ctx CGBitmapContextCreate nil w h 8 w 8 CGImageGetColorSpace image CGImage kCGImageAlphaPremultipliedLast CGContextClearRect ctx CGRectMake 0 0 originalWidth section.size.width originalHeight section.size.height w h before CGContextTranslateCTM..

Explain how OpenGL ES background images work

http://stackoverflow.com/questions/4820372/explain-how-opengl-es-background-images-work

CGContextTranslateCTM context 0 height CGContextScaleCTM context 1.0 1.0 CGColorSpaceRelease colorSpace CGContextClearRect context CGRectMake 0 0 width height CGContextTranslateCTM context 0 height height CGContextDrawImage context CGRectMake..

Is there an SDK to draw lines on iOS with touch?

http://stackoverflow.com/questions/6774352/is-there-an-sdk-to-draw-lines-on-ios-with-touch

UIGraphicsGetCurrentContext CGContextMoveToPoint UIGraphicsGetCurrentContext lastPoint.x lastPoint.y CGContextClearRect UIGraphicsGetCurrentContext CGRectMake lastPoint.x lastPoint.y 20 20 CGContextStrokePath UIGraphicsGetCurrentContext NSLog..

Drawing on the iPhone in objective c [closed]

http://stackoverflow.com/questions/7397567/drawing-on-the-iphone-in-objective-c

void drawRect CGRect rect CGColorRef blue UIColor blueColor CGColor CGContextRef context UIGraphicsGetCurrentContext CGContextClearRect context self.bounds CGContextSetFillColorWithColor context blue CGContextFillRect context CGRectMake pointx pointy 10 10..

iOS - How to achieve emboss effect for the text on UILabel?

http://stackoverflow.com/questions/8467141/ios-how-to-achieve-emboss-effect-for-the-text-on-uilabel

UIColor blackColor setFill UIRectFill rect CGContextClipToMask UIGraphicsGetCurrentContext rect mask.CGImage CGContextClearRect UIGraphicsGetCurrentContext rect UIImage image UIGraphicsGetImageFromCurrentImageContext UIGraphicsEndImageContext return..

Draw glow around inside edge of multiple CGPaths

http://stackoverflow.com/questions/8480401/draw-glow-around-inside-edge-of-multiple-cgpaths

setFill UIRectFill rect Now erase the masked part. CGContextClipToMask UIGraphicsGetCurrentContext rect mask.CGImage CGContextClearRect UIGraphicsGetCurrentContext rect UIImage image UIGraphicsGetImageFromCurrentImageContext UIGraphicsEndImageContext return..