¡@
2014/10/15 ¤U¤È 10:04:57
iphone Programming Glossary: ceilfhow to change UITabbar selected color? http://stackoverflow.com/questions/2506290/how-to-change-uitabbar-selected-color UIImage itemImage item image CGSize itemImageSize itemImage size CGPoint itemImagePosition itemImagePosition.x ceilf contextRect.size.width itemImageSize.width 2 itemImagePosition.y ceilf contextRect.size.height itemImageSize.height 2 .. CGPoint itemImagePosition itemImagePosition.x ceilf contextRect.size.width itemImageSize.width 2 itemImagePosition.y ceilf contextRect.size.height itemImageSize.height 2 UIGraphicsBeginImageContext contextRect.size CGContextRef c UIGraphicsGetCurrentContext..
Drawing in CATiledLayer with CoreGraphics CGContextDrawImage http://stackoverflow.com/questions/4067512/drawing-in-catiledlayer-with-coregraphics-cgcontextdrawimage image NULL CGDataProviderRef provider NULL NSString filename NSString stringWithFormat @ img_name_here 0.0f_ d_ d ceilf scale 100 col row NSString path NSBundle mainBundle pathForResource filename ofType @ png if path nil NSURL imageURL NSURL..
Drawing app on iPad using OpenGL http://stackoverflow.com/questions/4606680/drawing-app-on-ipad-using-opengl self.bounds.size.height currentStroke objectAtIndex i 2 CGPointValue .y Figure our how many dots you need count MAX ceilf sqrtf currentStroke objectAtIndex i 2 CGPointValue .x currentStroke objectAtIndex i CGPointValue .x currentStroke objectAtIndex..
Changing pen width according writing speed http://stackoverflow.com/questions/6490057/changing-pen-width-according-writing-speed malloc vertexMax 2 sizeof GLfloat Add points to the buffer so there are drawing points every X pixels count MAX ceilf sqrtf end.x start.x end.x start.x end.y start.y end.y start.y kBrushPixelStep 1 for i 0 i count i if vertexCount vertexMax..
Undo drawing in Paint Application http://stackoverflow.com/questions/6689600/undo-drawing-in-paint-application malloc eraseMax 2 sizeof GLfloat Add points to the buffer so there are drawing points every X pixels count MAX ceilf sqrtf end.x start.x end.x start.x end.y start.y end.y start.y kBrushPixelStep 1 for i 0 i count i if vertexCount eraseMax..
Making use of velocityInView with UIPanGestureRecognizer http://stackoverflow.com/questions/9093544/making-use-of-velocityinview-with-uipangesturerecognizer is currently set to 8.0. 8.0 is a decent level for slow panning for fast panning 2.0 is more reasonable changedLevel ceilf xTranslation panThreshold originalLevel int changedLevel Raw velocity seems to go from around 3 slow to over 200 fast NSLog..
Save OpenGL Drawn item as a Image http://stackoverflow.com/questions/9660723/save-opengl-drawn-item-as-a-image malloc vertexMax 2 sizeof GLfloat Add points to the buffer so there are drawing points every X pixels count MAX ceilf sqrtf end.x start.x end.x start.x end.y start.y end.y start.y kBrushPixelStep 1 for i 0 i count i if vertexCount vertexMax..
Record the drawing as a m4v video file - OpenGL http://stackoverflow.com/questions/9661259/record-the-drawing-as-a-m4v-video-file-opengl malloc vertexMax 2 sizeof GLfloat Add points to the buffer so there are drawing points every X pixels count MAX ceilf sqrtf end.x start.x end.x start.x end.y start.y end.y start.y kBrushPixelStep 1 for i 0 i count i if vertexCount vertexMax..
|