2014/10/15 下午 10:09:07
iphone Programming Glossary: flatcolor replacement in image for iphone application http://stackoverflow.com/questions/15082025/color-replacement-in-image-for-iphone-application CV_RGB2HSV 2 Isolate a color with cvThreshold specifying a certain tolerance you want a range of colors not one flat color . cvThreshold hsvImage threshImage 0 100 CV_THRESH_BINARY 3 Discard areas of color below a minimum size using a blob.. too. this solution has 2 problems don't have edge detection i think using contours i can achieve it replaced color has flat hue and sat which should set based on source pixel hue sat difference but not sure how to achieve that. may be instead of..
How can you play music from the iPod app while still receiving remote control events in your app? http://stackoverflow.com/questions/3191580/how-can-you-play-music-from-the-ipod-app-while-still-receiving-remote-control-ev return a valid NSURL object but initialization failed. Even worse when it was an Audible.com file the NSURL property flat out returned nil. If you try using an instance of the AVAudioPlayer to get remote events say with a blank sound file then.. library other than by using MPMusicPlayer. ANY suggestions on how to get around this would be welcome. Creative or flat out crazy. Don't care so long as it works. Anyone Anyone Bueller Bueller M iphone ios4 remote control share improve this..
How to use Keychain access to store passwords in iPhone App? http://stackoverflow.com/questions/4143240/how-to-use-keychain-access-to-store-passwords-in-iphone-app iPhone Keychain Backups Is There Any Point To Using The Keychain API On iPhone What you 胩e left with is an encrypted flat file database specialized for just a few data types with a really clunky and badly documented API. As I wrote above its..
Subdirectories within an iOS application http://stackoverflow.com/questions/418680/subdirectories-within-an-ios-application .app At the moment if I add a file into Xcode regardless of what Group hierarchy it is in the file always lands in a flat filesystem within my application bundle. iphone xcode bundle share improve this question If you just want to copy existing..
Mysterious “progressive slowing” problem in run loop / drawRect http://stackoverflow.com/questions/4786754/mysterious-progressive-slowing-problem-in-run-loop-drawrect The issue I see is the following. CGLayer are great for repeatedly painting because they cache their rendering into a flat image. The cache is invalidated when additional operations are appended to the context. When this happens the CGLayer is.. by @v01d. Flatten the layer. Instead of holding a single CGLayer copy the CGLayer on each iteration. This maintains a flat image in the Layer that is very fast to render. I Implemented 2 with good results. The first 100 flowers are faster and..
Point in Tilt Direction - iPhone http://stackoverflow.com/questions/5128861/point-in-tilt-direction-iphone 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. If LR is flat 0 the answer is either 0 or 180 depending on the sign of TA. If TA is flat 0 the answer.. from you. Go through this decision chain If both LR and TA is zero the machine is flat. Act appropriately. If LR is flat 0 the answer is either 0 or 180 depending on the sign of TA. If TA is flat 0 the answer is either 90 or 270 depending on.. is flat. Act appropriately. If LR is flat 0 the answer is either 0 or 180 depending on the sign of TA. If TA is flat 0 the answer is either 90 or 270 depending on the sign of LR. Otherwise adjustmentAngle arctan sin TA sin LR NB that should..
Tap pressure strength detection using accelerometer http://stackoverflow.com/questions/5179426/tap-pressure-strength-detection-using-accelerometer See the drums section on the Garageband page . I'm wondering how that's supposed to work if the iPad lays flat on the table. No movement no measurable acceleration no iphone ipad uikit accelerometer tap share improve this question..
iOS: Movement Precision in 3D Space http://stackoverflow.com/questions/5550453/ios-movement-precision-in-3d-space with the accelerometer and gyroscope that would enable this degree of accuracy For example the user holds the phone flat so that the bottom of the phone runs parallel with the floor . There is something drawn on screen which doesn't move with..
OpenGL-ES 2.0 VS OpenGL-ES 1.1, which is faster? http://stackoverflow.com/questions/5682010/opengl-es-2-0-vs-opengl-es-1-1-which-is-faster implements OpenGL ES 1.1 by efficiently implementing the fixed function pipeline using shaders. For rendering basic flat colored triangles I'd suggest going with OpenGL ES 1.1 simply because you'll need to write a lot less code. If you are able..
How to programmatically determine iPhone interface orientation? http://stackoverflow.com/questions/634745/how-to-programmatically-determine-iphone-interface-orientation UIDeviceOrientationFaceUp and UIDeviceOrientationFaceDown . While it might be useful to know that the device is flat this doesn't tell us whether it's flat displaying an interface oriented in portrait or landscape mode. Is there a way to.. . While it might be useful to know that the device is flat this doesn't tell us whether it's flat displaying an interface oriented in portrait or landscape mode. Is there a way to find the current orientation of the GUI..
Help calculating X and Y from Latitude and Longitude in iPhone http://stackoverflow.com/questions/6852195/help-calculating-x-and-y-from-latitude-and-longitude-in-iphone the angle. iphone google maps geolocation overlay share improve this question I would do this by assuming flat earth approximation and use vector algebra to relate angles and distances in the lat lon space to the x y pixel space. For..
How to change a particular color in an image? http://stackoverflow.com/questions/8046643/how-to-change-a-particular-color-in-an-image to change the hue . Isolate a color with cvThreshold specifying a certain tolerance you want a range of colors not one flat color . Discard areas of color below a minimum size using a blob detection library like cvBlobsLib . This will get rid of..
Detect iPhone screen orientation http://stackoverflow.com/questions/999686/detect-iphone-screen-orientation work and could use a nudge in the right direction. My current code logs the current angle but even when the phone is flat I get readings varying wildly a few times a second. void checkOrientation UIAccelerometer accelerometer didAccelerate UIAcceleration.. atan2 accelerationY accelerationX 180 M_PI NSLog @ Angle f currentRawReading Sample from log while phone is flat 2009 06 16 17 29 07.987 373 207 Angle 0.162292 2009 06 16 17 29 07.994 373 207 Angle 179.838547 2009 06 16 17 29 08.014..
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