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2014/10/15 ¤U¤È 10:10:34
iphone Programming Glossary: inverseUIScrollView ImageView with pins on top http://stackoverflow.com/questions/1051912/uiscrollview-imageview-with-pins-on-top oldFrame When you zoom in on scrollView it gets a larger zoom scale value. You transform the pin by scaling it by the inverse of this value. dropPinView.transform CGAffineTransformMakeScale 1.0 scrollView.zoomScale 1.0 scrollView.zoomScale UIView..
How to measure the distance covered by iphone during free fall? http://stackoverflow.com/questions/1073608/how-to-measure-the-distance-covered-by-iphone-during-free-fall
Core Data, NSPredicate and to-many key http://stackoverflow.com/questions/1164338/core-data-nspredicate-and-to-many-key One of the properties of excludedOccurrences is start which is an NSDate object. The ExcludedOccurrence entity has an inverse mandatory to one relationship to the Task entity. In order to fetch tasks for a specified day I need to make sure that the..
How to correctly setup a NSPredicate for a to-many relationship when using Core Data? http://stackoverflow.com/questions/1347776/how-to-correctly-setup-a-nspredicate-for-a-to-many-relationship-when-using-core entity. One of the properties of ExcludedDay is day which is an NSDate object. The ExcludedDay entity has an inverse mandatory to one relationship to the Task entity. In order to fetch the tasks for a specified day I need to make sure that..
How do I create/render a UIImage from a 3D transformed UIImageView? http://stackoverflow.com/questions/1949003/how-do-i-create-render-a-uiimage-from-a-3d-transformed-uiimageview animation share improve this question I ended up creating a render method pixel per pixel on the CPU using the inverse of the view transform. Basically it renders the original UIImageView into a UIImage. Then every pixel in the UIImage is.. Basically it renders the original UIImageView into a UIImage. Then every pixel in the UIImage is multiplied by the inverse transform matrix to generate the transformed UIImage. RenderUIImageView.h #import UIKit UIKit.h #import QuartzCore CATransform3D.h..
OpenGL ES (iPhone) Touch Picking http://stackoverflow.com/questions/2231433/opengl-es-iphone-touch-picking in ES. I'd prefer not to use third party libs GLU ports and OpenGL name stacks etc are out. This pretty much leaves inverse view transformation and ray intersection correct I've gotten pretty far with the help of http trac.bookofhook.com bookofhook..
Core data many-to-many relationship - Predicate question http://stackoverflow.com/questions/2328585/core-data-many-to-many-relationship-predicate-question can belong to any number of different lists. I have therefore set a relationship on List called 'patients' that has an inverse to many relationship to Patient AND a relationship on Patient called 'lists' that has a to many relationship to List. What..
How does undo/redo basically work on iPhone OS? http://stackoverflow.com/questions/2449268/how-does-undo-redo-basically-work-on-iphone-os Set the undo action name in the menu undo setActionName @ Edit can be used to observe changes in properties creating inverse NSInvocations that will undo edits to those properties. Core Data is not needed for undo but it makes it much much easier...
http://stackoverflow.com/questions/3245733/apple-gyroscope-sample-code 14 0 rotMatrix 15 1 Depending on what you want to do with that you may have to invert it which is very easy. The inverse of a rotation is just its transpose which means swapping the columns and rows. So the above becomes rotMatrix 0 rot.m11..
Using the apple FFT and accelerate Framework http://stackoverflow.com/questions/3398753/using-the-apple-fft-and-accelerate-framework fill it with n real numbers. after the FFT it is going to be holding n 2 complex numbers. we then throw that into the inverse transform and hopefully get out our original n real numbers. now the structure of A its setup for complex values. So vDSP..
iPhone - understanding iPhone rotation http://stackoverflow.com/questions/5170010/iphone-understanding-iphone-rotation one q2. Then you can calculate the delta dQ between them so that q2 q1 dQ is valid. All you have to do is build the inverse of q1 q1^ 1 and then you get dQ q1^ 1 q2 If deviceMotionInterval is high enough you always have handy small Euler angles..
Convert span value into meters on a mapview http://stackoverflow.com/questions/5270485/convert-span-value-into-meters-on-a-mapview out the map i need to know how many meters are currently represented on the map width or height . What i need is the inverse function of MKCoordinateRegionMakeWithDistance to calculate the distance represented by the current map span. I tried the..
iPhone FFT with Accelerate framework vDSP http://stackoverflow.com/questions/6358764/iphone-fft-with-accelerate-framework-vdsp vDSP_ztoc to get a split real vector. vDSP_ztoc A 1 COMPLEX obtainedReal 2 nOver2 Check for accuracy by looking at the inverse transform results. Compare originalReal obtainedReal n Thanks iphone objective c ios signal processing fft share improve..
allow only alphanumeric characters for a UITextField http://stackoverflow.com/questions/7541803/allow-only-alphanumeric-characters-for-a-uitextfield method textField shouldChangeCharactersInRange replacementString with an NSCharacterSet containing the inverse of the characters you want to allow. For example in init initWithNibName bundle or similar NSCharacterSet blockedCharacters..
Is it possible to select the text rendered by Core Text in iPhone? http://stackoverflow.com/questions/7979592/is-it-possible-to-select-the-text-rendered-by-core-text-in-iphone After doing that you can test which line has the touched point looping the lines always remember that CoreText uses inverse Y coordinates . Knowing the line that has the touched point you can know the letter that is located at that point or the..
NSFetchedResultsController and NSOrderedSet relationships http://stackoverflow.com/questions/8758429/nsfetchedresultscontroller-and-nsorderedset-relationships to Sock . The idea being that the socks are in the drawer in a specific order. On Sock the drawer relationship is the inverse of the socks relationship. In a UIViewController I am drawing a UITableView based on these entities. I am feeding the table..
http://stackoverflow.com/questions/8859285/uibezierpath-subtract-path which is the opposite of what you want. What you need to do is intersect the existing clipping path with the inverse of smallMaskPath . Fortunately you can do that pretty easily using the even odd winding rule. You can read about the even..
How can I mute the capture sound in AVFoundation? http://stackoverflow.com/questions/9557081/how-can-i-mute-the-capture-sound-in-avfoundation to avoid having too many frames waiting in the queue because it can cause memory issues . It is similar to the inverse of the maximum framerate. In this example we set a min frame duration of 1 10 seconds so a maximum framerate of 10fps. We..
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