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2014/10/15 ¤U¤È 10:13:07
iphone Programming Glossary: radiansResizing UIimages pulled from the Camera also ROTATES the UIimage? http://stackoverflow.com/questions/1260249/resizing-uiimages-pulled-from-the-camera-also-rotates-the-uiimage bitmapInfo if sourceImage.imageOrientation UIImageOrientationLeft CGContextRotateCTM bitmap radians 90 CGContextTranslateCTM bitmap 0 targetHeight else if sourceImage.imageOrientation UIImageOrientationRight.. else if sourceImage.imageOrientation UIImageOrientationRight CGContextRotateCTM bitmap radians 90 CGContextTranslateCTM bitmap targetWidth 0 else if sourceImage.imageOrientation UIImageOrientationUp.. CGContextTranslateCTM bitmap targetWidth targetHeight CGContextRotateCTM bitmap radians 180. CGContextDrawImage bitmap CGRectMake 0 0 targetWidth targetHeight imageRef CGImageRef ref CGBitmapContextCreateImage..
How to Rotate a UIImage 90 degrees? http://stackoverflow.com/questions/1315251/how-to-rotate-a-uiimage-90-degrees bitmapInfo if sourceImage.imageOrientation UIImageOrientationRight CGContextRotateCTM bitmap radians 90 CGContextTranslateCTM bitmap 0 targetHeight else if sourceImage.imageOrientation UIImageOrientationLeft.. targetHeight else if sourceImage.imageOrientation UIImageOrientationLeft CGContextRotateCTM bitmap radians 90 CGContextTranslateCTM bitmap targetWidth 0 else if sourceImage.imageOrientation UIImageOrientationDown.. NOTHING else if sourceImage.imageOrientation UIImageOrientationUp CGContextRotateCTM bitmap radians 90 CGContextTranslateCTM bitmap 0 targetHeight CGContextDrawImage bitmap CGRectMake 0 0 targetWidth..
Can I use CGAffineTransformMakeRotation to rotate a view more than 360 degrees? http://stackoverflow.com/questions/542739/can-i-use-cgaffinetransformmakerotation-to-rotate-a-view-more-than-360-degrees animation core graphics share improve this question You can rotate a view by some number of radians regardless of whether it is less than a full rotation or many multiples of a full rotation without having.. You can easily modify it to spin a view by a certain number of rotations or by some number of radians. void runSpinAnimationWithDuration CGFloat duration CABasicAnimation rotationAnimation rotationAnimation..
Resizing UIimages pulled from the Camera also ROTATES the UIimage? http://stackoverflow.com/questions/1260249/resizing-uiimages-pulled-from-the-camera-also-rotates-the-uiimage imageRef CGImageGetBytesPerRow imageRef colorSpaceInfo bitmapInfo if sourceImage.imageOrientation UIImageOrientationLeft CGContextRotateCTM bitmap radians 90 CGContextTranslateCTM bitmap 0 targetHeight else if sourceImage.imageOrientation UIImageOrientationRight CGContextRotateCTM bitmap radians 90 CGContextTranslateCTM.. bitmap radians 90 CGContextTranslateCTM bitmap 0 targetHeight else if sourceImage.imageOrientation UIImageOrientationRight CGContextRotateCTM bitmap radians 90 CGContextTranslateCTM bitmap targetWidth 0 else if sourceImage.imageOrientation UIImageOrientationUp NOTHING else if sourceImage.imageOrientation UIImageOrientationDown.. NOTHING else if sourceImage.imageOrientation UIImageOrientationDown CGContextTranslateCTM bitmap targetWidth targetHeight CGContextRotateCTM bitmap radians 180. CGContextDrawImage bitmap CGRectMake 0 0 targetWidth targetHeight imageRef CGImageRef ref CGBitmapContextCreateImage bitmap UIImage newImage UIImage imageWithCGImage..
How to Rotate a UIImage 90 degrees? http://stackoverflow.com/questions/1315251/how-to-rotate-a-uiimage-90-degrees imageRef CGImageGetBytesPerRow imageRef colorSpaceInfo bitmapInfo if sourceImage.imageOrientation UIImageOrientationRight CGContextRotateCTM bitmap radians 90 CGContextTranslateCTM bitmap 0 targetHeight else if sourceImage.imageOrientation UIImageOrientationLeft CGContextRotateCTM bitmap radians 90 CGContextTranslateCTM.. bitmap radians 90 CGContextTranslateCTM bitmap 0 targetHeight else if sourceImage.imageOrientation UIImageOrientationLeft CGContextRotateCTM bitmap radians 90 CGContextTranslateCTM bitmap targetWidth 0 else if sourceImage.imageOrientation UIImageOrientationDown NOTHING else if sourceImage.imageOrientation UIImageOrientationUp.. 0 else if sourceImage.imageOrientation UIImageOrientationDown NOTHING else if sourceImage.imageOrientation UIImageOrientationUp CGContextRotateCTM bitmap radians 90 CGContextTranslateCTM bitmap 0 targetHeight CGContextDrawImage bitmap CGRectMake 0 0 targetWidth targetHeight imageRef CGImageRef ref CGBitmapContextCreateImage..
Can I use CGAffineTransformMakeRotation to rotate a view more than 360 degrees? http://stackoverflow.com/questions/542739/can-i-use-cgaffinetransformmakerotation-to-rotate-a-view-more-than-360-degrees be a better route to go Thanks Blake. iphone cocoa touch core animation core graphics share improve this question You can rotate a view by some number of radians regardless of whether it is less than a full rotation or many multiples of a full rotation without having to split the rotation into pieces. As an example the following.. spin a view once per second for a specified number of seconds. You can easily modify it to spin a view by a certain number of rotations or by some number of radians. void runSpinAnimationWithDuration CGFloat duration CABasicAnimation rotationAnimation rotationAnimation CABasicAnimation animationWithKeyPath @ transform.rotation.z..
Drawing rotated text with NSString drawInRect http://stackoverflow.com/questions/10289898/drawing-rotated-text-with-nsstring-drawinrect NSString string @ some test string UIFont font UIFont systemFontOfSize 16.0 Rotate the context 90 degrees convert to radians CGAffineTransform transform1 CGAffineTransformMakeRotation 90.0 M_PI 180.0 CGContextConcatCTM context transform1 Move the..
Resizing UIimages pulled from the Camera also ROTATES the UIimage? http://stackoverflow.com/questions/1260249/resizing-uiimages-pulled-from-the-camera-also-rotates-the-uiimage imageRef colorSpaceInfo bitmapInfo if sourceImage.imageOrientation UIImageOrientationLeft CGContextRotateCTM bitmap radians 90 CGContextTranslateCTM bitmap 0 targetHeight else if sourceImage.imageOrientation UIImageOrientationRight CGContextRotateCTM.. bitmap 0 targetHeight else if sourceImage.imageOrientation UIImageOrientationRight CGContextRotateCTM bitmap radians 90 CGContextTranslateCTM bitmap targetWidth 0 else if sourceImage.imageOrientation UIImageOrientationUp NOTHING else if.. UIImageOrientationDown CGContextTranslateCTM bitmap targetWidth targetHeight CGContextRotateCTM bitmap radians 180. CGContextDrawImage bitmap CGRectMake 0 0 targetWidth targetHeight imageRef CGImageRef ref CGBitmapContextCreateImage..
How to Rotate a UIImage 90 degrees? http://stackoverflow.com/questions/1315251/how-to-rotate-a-uiimage-90-degrees imageRef colorSpaceInfo bitmapInfo if sourceImage.imageOrientation UIImageOrientationRight CGContextRotateCTM bitmap radians 90 CGContextTranslateCTM bitmap 0 targetHeight else if sourceImage.imageOrientation UIImageOrientationLeft CGContextRotateCTM.. bitmap 0 targetHeight else if sourceImage.imageOrientation UIImageOrientationLeft CGContextRotateCTM bitmap radians 90 CGContextTranslateCTM bitmap targetWidth 0 else if sourceImage.imageOrientation UIImageOrientationDown NOTHING else if.. UIImageOrientationDown NOTHING else if sourceImage.imageOrientation UIImageOrientationUp CGContextRotateCTM bitmap radians 90 CGContextTranslateCTM bitmap 0 targetHeight CGContextDrawImage bitmap CGRectMake 0 0 targetWidth targetHeight imageRef..
http://stackoverflow.com/questions/3841642/curve-text-on-existing-circle length of the string into units on the UnitCircle . Thus string.lenght circle perimeter 2Pi. You now have the angle in radians for the whole string. That is the angle between start and end of the string For the separate letters you could do the same.. is the angle between start and end of the string For the separate letters you could do the same to get the angle in radians for individual letters using letter widths Once you have the angle in radians you can work out the x and y position and.. could do the same to get the angle in radians for individual letters using letter widths Once you have the angle in radians you can work out the x and y position and rotation of the letters. Bonus for even spacing you could even work out the ratio..
http://stackoverflow.com/questions/4130821/iphone-compass-gps-direction is heading atan2 sin lon2 lon1 cos lat2 cos lat1 sin lat2 sin lat1 cos lat2 cos lon2 lon1 This gives you a bearing in radians which you can convert to degrees by multiplying by 180 . The value is then between 180 and 180 degrees so to get a standard..
Can I use CGAffineTransformMakeRotation to rotate a view more than 360 degrees? http://stackoverflow.com/questions/542739/can-i-use-cgaffinetransformmakerotation-to-rotate-a-view-more-than-360-degrees cocoa touch core animation core graphics share improve this question You can rotate a view by some number of radians regardless of whether it is less than a full rotation or many multiples of a full rotation without having to split the rotation.. number of seconds. You can easily modify it to spin a view by a certain number of rotations or by some number of radians. void runSpinAnimationWithDuration CGFloat duration CABasicAnimation rotationAnimation rotationAnimation CABasicAnimation..
Calculate new coordinate x meters and y degree away from one coordinate http://stackoverflow.com/questions/6633850/calculate-new-coordinate-x-meters-and-y-degree-away-from-one-coordinate The JavaScript code is at the bottom of that page and here's one possible way to convert it to Objective C double radiansFromDegrees double degrees return degrees M_PI 180.0 double degreesFromRadians double radians return radians 180.0 M_PI CLLocationCoordinate2D.. it to Objective C double radiansFromDegrees double degrees return degrees M_PI 180.0 double degreesFromRadians double radians return radians 180.0 M_PI CLLocationCoordinate2D coordinateFromCoord CLLocationCoordinate2D fromCoord atDistanceKm double.. C double radiansFromDegrees double degrees return degrees M_PI 180.0 double degreesFromRadians double radians return radians 180.0 M_PI CLLocationCoordinate2D coordinateFromCoord CLLocationCoordinate2D fromCoord atDistanceKm double distanceKm atBearingDegrees..
Basic keyframe animation (rotation) http://stackoverflow.com/questions/1031177/basic-keyframe-animation-rotation what I've got so far which does get the graphic to the desired rotation via the most acute angle #define DEGREES_TO_RADIANS __ANGLE__ __ANGLE__ 180.0 M_PI ... UIView beginAnimations nil context nil CGAffineTransform cgCTM CGAffineTransformMakeRotation.. 180.0 M_PI ... UIView beginAnimations nil context nil CGAffineTransform cgCTM CGAffineTransformMakeRotation DEGREES_TO_RADIANS desiredEndingAngle UIView setAnimationDuration 0.5 graphic.transform cgCTM UIView commitAnimations As I understand it I.. YES animation.repeatCount 1 animation.values NSArray arrayWithObjects i.e. Rotation values for the 3 keyframes in RADIANS NSNumber numberWithFloat 0.0 M_PI NSNumber numberWithFloat 0.75 M_PI NSNumber numberWithFloat 1.5 M_PI nil animation.keyTimes..
Core Animation CALayer mask animation performance http://stackoverflow.com/questions/4520941/core-animation-calayer-mask-animation-performance animation CABasicAnimation animationWithKeyPath @ transform CATransform3D transform CATransform3DMakeRotation RADIANS 179.9 0.0 0.0 1.0 animation.toValue NSValue valueWithCATransform3D transform animation.duration 5 animation.repeatCount..
How do you make images wobble like on the iPhone home screen? http://stackoverflow.com/questions/4980122/how-do-you-make-images-wobble-like-on-the-iphone-home-screen screen you could do something like this CGAffineTransform leftWobble CGAffineTransformRotate CGAffineTransformIdentity RADIANS 15.0 CGAffineTransform rightWobble CGAffineTransformRotate CGAffineTransformIdentity RADIANS 15.0 view.transform leftWobble.. CGAffineTransformIdentity RADIANS 15.0 CGAffineTransform rightWobble CGAffineTransformRotate CGAffineTransformIdentity RADIANS 15.0 view.transform leftWobble starting point UIView beginAnimations @ wobble context view UIView setAnimationRepeatAutoreverses..
how to create iphone's wobbling icon effect? http://stackoverflow.com/questions/929364/how-to-create-iphones-wobbling-icon-effect any pointers. Thanks iphone ios animation rotation share improve this question Simple way to do it #define RADIANS degrees degrees M_PI 180.0 CGAffineTransform leftWobble CGAffineTransformRotate CGAffineTransformIdentity RADIANS 5.0 CGAffineTransform.. RADIANS degrees degrees M_PI 180.0 CGAffineTransform leftWobble CGAffineTransformRotate CGAffineTransformIdentity RADIANS 5.0 CGAffineTransform rightWobble CGAffineTransformRotate CGAffineTransformIdentity RADIANS 5.0 itemView.transform leftWobble.. CGAffineTransformIdentity RADIANS 5.0 CGAffineTransform rightWobble CGAffineTransformRotate CGAffineTransformIdentity RADIANS 5.0 itemView.transform leftWobble starting point UIView beginAnimations @ wobble context itemView UIView setAnimationRepeatAutoreverses..
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