2014/10/15 下午 10:05:24

iphone Programming Glossary: computed

MPMoviePlayerController: when will I know that the downloading of the file reaches 10 percent?

http://stackoverflow.com/questions/10346327/mpmovieplayercontroller-when-will-i-know-that-the-downloading-of-the-file-reach

file. How would I know that the downloading of the file reaches 10 By the way I already got the file size and already computed the 10th percent of any file All I want to know is when will I be able to know that it already downloaded 10 of the file..

In App Purchase (IAP) process appears to be crashing the app on launch for one of my users

http://stackoverflow.com/questions/19203921/in-app-purchase-iap-process-appears-to-be-crashing-the-app-on-launch-for-one-o

productId being passed here is 'nil' which will cause a crash b c it will be used as a key and a hash will need to be computed down the line. However its still not clear to us why it is sometimes 'nil'. But at least the crash can be avoided by guarding..

distance between android and iphone

http://stackoverflow.com/questions/20730115/distance-between-android-and-iphone

Audio Processing: Playing with volume level

http://stackoverflow.com/questions/3982723/audio-processing-playing-with-volume-level

two passes over the audio One to determine the sample with the greatest amplitude. Then another to actually apply your computed gain. Using AudioQueue services just to get access to the volume property is serious serious overkill. UPDATE In your updated..

Drawing in CATiledLayer with CoreGraphics CGContextDrawImage

http://stackoverflow.com/questions/4067512/drawing-in-catiledlayer-with-coregraphics-cgcontextdrawimage

is being drawn. I think there is a problem with the translation operation or the way the coordinates of the tiles are computed. This is how it looks like I am a bit confused with all this transformations. Bonus question How would one handle the retina..

Store orientation to an array - and compare

http://stackoverflow.com/questions/6368618/store-orientation-to-an-array-and-compare

cost matrix see below. Check Figure 3 of that paper to see this recurrence relation is applied. In short columns are computed first starting from D 1 1 D 0 and D 0 are left out in the MIN. If we are comparing arrays A and B then Dist i j is the distance..

Performing iPhone optimization on externally downloaded PNGs

http://stackoverflow.com/questions/640909/performing-iphone-optimization-on-externally-downloaded-pngs

will likely use a slower rendering path one that deals with the non native format and the fact that the alpha must be computed separately for each color. So you have two options Perform the same work that pngcrush does and swap ordering pre multiply..

Need some help understanding transient properties in Core Data

http://stackoverflow.com/questions/7504391/need-some-help-understanding-transient-properties-in-core-data

accessors would be fine. They can't have any instance variables for any useful purpose other than temporary caches of computed values because those instance variables could be erased at any moment. I know they won't be persisted on disk but I thought..

Property with no iVar and getter method?

http://stackoverflow.com/questions/8788730/property-with-no-ivar-and-getter-method

which is what is done in your example. Further a read only property does not have to be based on an ivar but can be computed based on other ivars or properties. This can be useful if you use bindings to display values in the UI that are derived.. are derived from other properties provided you like that coding style. Here is a simple example of a readonly property computed based on two other properties Header file @property double width @property double height @property readonly double area..

Stretching an UIImage while preserving the corners

http://stackoverflow.com/questions/8879817/stretching-an-uiimage-while-preserving-the-corners

size of the left end cap. The middle stretchable portion is assumed to be 1 pixel wide. The right end cap is therefore computed by adding the size of the left end cap and the middle portion together and then subtracting that value from the width of..