2014/10/15 下午 10:14:23

iphone Programming Glossary: squared

how can i trace the finger movement on touch for drawing smooth curves?

http://stackoverflow.com/questions/1052119/how-can-i-trace-the-finger-movement-on-touch-for-drawing-smooth-curves

NURBS knot vector this will give you a NURBS curve that closely approximates your sample points minimizing the squared distance between the samples and your curve. The NURBS curve can even be decomposed into a series of Bezier curves if needed...

Customizing Left & Right UISegmentedControl Buttons

http://stackoverflow.com/questions/10562300/customizing-left-right-uisegmentedcontrol-buttons

a custom image is so that I can change the corners of the buttons. If you look at the blue segmented control it's more squared my image has it's own corners . I was thinking of something like this but no use UIImage leftImage UIImage imageNamed @..

Drag UIView around Shape Comprised of CGMutablePaths

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

index return hypotf point.x proposedHandlePoint.x point.y proposedHandlePoint.y You could speed things up by using squared distances to avoid the square roots that hypotf is computing. One more tiny detail the index into the points array needs..

iPhone stretchableImageWithLeftCapWidth only makes “D”s

http://stackoverflow.com/questions/2924408/iphone-stretchableimagewithleftcapwidth-only-makes-ds

image 'stretch' and 'shrink' The reason I ask... is because all my images end up look like a D shape. The left side is squared off... and the right side is rounded. What would a D shape tell you that I'm doing wrong Too much.. or too little... leftCap..

Big activity indicator on iPhone

http://stackoverflow.com/questions/3490991/big-activity-indicator-on-iphone

activity indicator on iPhone Does anyone know how to show a rounded squared with a spinning activity indicator It is used in many apps. If you don't know what im talking about it looks like the indicator..

iPhone FFT with Accelerate framework vDSP

http://stackoverflow.com/questions/6358764/iphone-fft-with-accelerate-framework-vdsp

for each output bin. If you're only interested in relative magnitude then you can drop the sqrt and just calculate the squared magnitude re re im im . You would look at the magnitudes of the bin or bins see 2 that correspond to your frequency or frequencies..