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2014/10/15 ¤U¤È 10:04:59
iphone Programming Glossary: cftimeintervalCGAffineTransformMakeRotation counter clockwise always http://stackoverflow.com/questions/13791582/cgaffinetransformmakerotation-counter-clockwise-always self rotateViewAnimated self.clockArm withDuration 1.5 byAngle angle void rotateViewAnimated UIView view withDuration CFTimeInterval duration byAngle CGFloat angle CABasicAnimation rotationAnimation rotationAnimation CABasicAnimation animationWithKeyPath..
Is there a way to pause a CABasicAnimation? http://stackoverflow.com/questions/2306870/is-there-a-way-to-pause-a-cabasicanimation how to pause resume layer's animation. Pause and resume animations listing is below void pauseLayer CALayer layer CFTimeInterval pausedTime layer convertTime CACurrentMediaTime fromLayer nil layer.speed 0.0 layer.timeOffset pausedTime void resumeLayer.. CACurrentMediaTime fromLayer nil layer.speed 0.0 layer.timeOffset pausedTime void resumeLayer CALayer layer CFTimeInterval pausedTime layer timeOffset layer.speed 1.0 layer.timeOffset 0.0 layer.beginTime 0.0 CFTimeInterval timeSincePause layer.. CALayer layer CFTimeInterval pausedTime layer timeOffset layer.speed 1.0 layer.timeOffset 0.0 layer.beginTime 0.0 CFTimeInterval timeSincePause layer convertTime CACurrentMediaTime fromLayer nil pausedTime layer.beginTime timeSincePause share improve..
UIVIew Flip Vertical Animation http://stackoverflow.com/questions/5144446/uiview-flip-vertical-animation M_PI 2 view2.hidden YES making sure that both views have the same position view2.frame view1.frame CFTimeInterval duration 2.0 UIView animateWithDuration duration 2 delay 0 options UIViewAnimationCurveEaseIn animations ^ view1.layer.transform..
UILabel updating stops during scrolling UIScrollView http://stackoverflow.com/questions/5377914/uilabel-updating-stops-during-scrolling-uiscrollview target self selector @selector updateElapsedTimeLabel userInfo nil repeats YES void updateElapsedTimeLabel CFTimeInterval currentTime CFAbsoluteTimeGetCurrent float theTime currentTime startTime elapsedTimeLabel.text NSString stringWithFormat..
How to measure true FPS performance of OpenGL ES? http://stackoverflow.com/questions/6586635/how-to-measure-true-fps-performance-of-opengl-es accurate assessment of my overall rendering performance. It's trivial to encapsulate your rendering in something like CFTimeInterval previousTimestamp CFAbsoluteTimeGetCurrent Do your OpenGL ES frame rendering here as well as presenting the onscreen render.. CFAbsoluteTimeGetCurrent Do your OpenGL ES frame rendering here as well as presenting the onscreen render buffer CFTimeInterval frameDuration CFAbsoluteTimeGetCurrent previousTimestamp NSLog @ Frame duration f ms frameDuration 1000.0 to obtain rendering..
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