2014/10/15 下午 10:05:08

iphone Programming Glossary: clockwise

How can I enforce an specific direction (i.e. clockwise) of rotation in Core Animation?

http://stackoverflow.com/questions/1149635/how-can-i-enforce-an-specific-direction-i-e-clockwise-of-rotation-in-core-ani

can I enforce an specific direction i.e. clockwise of rotation in Core Animation I am rotating a view with this CGAffineTransform rotatedTransform CGAffineTransformRotate.. So the object rotates the other way around with a shorter amount of movement. I want to constrain it to rotate clockwise. Would I have to do that by changing animations in little steps or is there an more elegant way iphone cocoa touch uikit.. kCAMediaTimingFunctionLinear nil layer addAnimation animation forKey @ transform.rotation.z If you're after counterclockwise animation you should use negative values. For a slightly more basic animation you can use CABasicAnimation CALayer layer..

How to Rotate a UIImage 90 degrees?

http://stackoverflow.com/questions/1315251/how-to-rotate-a-uiimage-90-degrees

a UIImage 90 degrees I have a UIImage that is UIImageOrientationUp portrait that I would like to rotate counter clockwise by 90 degrees to landscape . I don't want to use a CGAffineTransform. I want the pixels of the UIImage to actually shift..

Drag UIView around Shape Comprised of CGMutablePaths

http://stackoverflow.com/questions/13664615/drag-uiview-around-shape-comprised-of-cgmutablepaths

path_ UIBezierPath bezierPath path_ addArcWithCenter topCenter radius radius startAngle M_PI_4 endAngle M_PI M_PI_4 clockwise NO path_ addArcWithCenter bottomCenter radius radius startAngle M_PI_4 endAngle M_PI M_PI_4 clockwise YES path_ closePath.. M_PI M_PI_4 clockwise NO path_ addArcWithCenter bottomCenter radius radius startAngle M_PI_4 endAngle M_PI M_PI_4 clockwise YES path_ closePath Next we're going to want to compute the array of points along that path. We'll need a helper routine..

FFmpeg on iPhone - Modifying Video Orientation

http://stackoverflow.com/questions/2208522/ffmpeg-on-iphone-modifying-video-orientation

Can js/jQuery determine the orientation of the iPhone?

http://stackoverflow.com/questions/2323281/can-js-jquery-determine-the-orientation-of-the-iphone

Description 0 Portrait orientation. This is the default value. 90 Landscape orientation with the screen turned clockwise. 90 Landscape orientation with the screen turned counterclockwise. 180 Portrait orientation with the screen turned upside.. 90 Landscape orientation with the screen turned clockwise. 90 Landscape orientation with the screen turned counterclockwise. 180 Portrait orientation with the screen turned upside down. This value is currently not supported on iPhone. share improve..

Changing the volume without a volume slider on an iphone

http://stackoverflow.com/questions/3458965/changing-the-volume-without-a-volume-slider-on-an-iphone

in my app. I don't want to use a volume slider. Instead I have an UIImageView which is a volume knob in which I rotate clockwise to increase and anti clockwise to decrease the sound volume. The rotation is just an animation and I've already done that.. a volume slider. Instead I have an UIImageView which is a volume knob in which I rotate clockwise to increase and anti clockwise to decrease the sound volume. The rotation is just an animation and I've already done that part. I need your help and advice..

Draw part of a circle

http://stackoverflow.com/questions/3729690/draw-part-of-a-circle

question Use the arc methods CGContextAddArc context centerX centerY radius startAngleRadians endAngleRadians clockwise 1 0 See the documentation for CGContextAddArc . Aside Does anyone know how to link directly to the docs for a function given..

Rotating image using objective C

http://stackoverflow.com/questions/4010779/rotating-image-using-objective-c

the image rotates completely to reach the point where I have clicked and then rotates slowly as I drag the image clockwise. I am concerned to why it is rotating completely to the place that I am dragging. I want the dragging to start from the..

Compensating compass lag with the gyroscope on iPhone 4

http://stackoverflow.com/questions/4212988/compensating-compass-lag-with-the-gyroscope-on-iphone-4

ranges from 0 to PI when the phone is pointing downwards as indicated by deviceMotion.gravity.z and swinging counterclockwise and 0 to PI when swung clockwise when the device is pointing upwards yaw ranges from PI to 0 and PI to 0 respectively and.. is pointing downwards as indicated by deviceMotion.gravity.z and swinging counterclockwise and 0 to PI when swung clockwise when the device is pointing upwards yaw ranges from PI to 0 and PI to 0 respectively and from the compass data I'm using.. I see that the compass gives values from 0 to 360 with the value increasing when swinging clockwise All right so using all of this information together I'm able to get a value I call horizontal that regardless of whether..

Inner shadow effect on UIView layer?

http://stackoverflow.com/questions/4431292/inner-shadow-effect-on-uiview-layer

to subtract when you add them together you need to draw them or rather construct them in opposite directions one clockwise and the other anti clockwise. Then you need to set your visible path as the clipping path on the context so that you don't.. them together you need to draw them or rather construct them in opposite directions one clockwise and the other anti clockwise. Then you need to set your visible path as the clipping path on the context so that you don't draw anything outside it to..

how can I use animation in cocos2d?

http://stackoverflow.com/questions/486609/how-can-i-use-animation-in-cocos2d

for your rotation angle it would only go a quarter circle. Likewise if you used 0.999f pi the circle would rotate in a clockwise manner. You'll want to implement acceleration and deceleration of your wheel and for those a CAKeyframeAnimation would take..

Point in Tilt Direction - iPhone

http://stackoverflow.com/questions/5128861/point-in-tilt-direction-iphone

to begin with. You won't be able to do anything until that is working. The solutionAngle will be like a clock hand clockwise with 12 distant from you. Go through this decision chain If both LR and TA is zero the machine is flat. Act appropriately...

iPhone Core Animation - Drawing a Circle

http://stackoverflow.com/questions/7991086/iphone-core-animation-drawing-a-circle

The best way I can explain this is if you can imagine drawing a circle. It starts at the top or 12 o clock and draws clockwise all the way around until it becomes a complete circle over the space of 10 or so seconds. The closet I have come to this.. in drawRect . The code below will create a circle shape layer in the center of the screen and animate the stroke of it clockwise so that it looks as if it is being drawn. You can of course use any shape you'd like. You can read this article on Ole Begemanns..