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2014/10/15 ¤U¤È 10:14:20
iphone Programming Glossary: speedOptimizing CLLocationManager/CoreLocation to retrieve data points faster on the iPhone http://stackoverflow.com/questions/1081219/optimizing-cllocationmanager-corelocation-to-retrieve-data-points-faster-on-the long to collect 10 samples. I'll paste my filters accuracy respective code below. If anyone can comment on how I can speed this up that would be great. Until I speed it up it's rather useless in my app as it currently takes around 3 4 minutes.. filters accuracy respective code below. If anyone can comment on how I can speed this up that would be great. Until I speed it up it's rather useless in my app as it currently takes around 3 4 minutes to gather info a duration that's not accept.. an accuracy of 120 meters we can adjust this. myLocs addObject newLocation Thanks for any optimization tricks to speed this up. iphone cocoa touch core location share improve this question I've had lots of issues with CLLocationManager..
What does the Tiler Utilization statistic mean in the iPhone OpenGL ES instrument? http://stackoverflow.com/questions/1287811/what-does-the-tiler-utilization-statistic-mean-in-the-iphone-opengl-es-instrumen buffer objects and minimizing changes in drawing state but none of these changes have made a difference in rendering speed. No matter what I can't seem to push my application above 320 000 triangles s on an iPhone 3G running the 3.0 OS. According..
How to save the content in UIWebView for faster loading on next launch? http://stackoverflow.com/questions/1343515/how-to-save-the-content-in-uiwebview-for-faster-loading-on-next-launch cachedResponseForRequest NSURLRequest request From that here's what I do to handle the cache on the disk on my side to speed up the load of a UIWebView Subclass the NSURLCache and override the get control over the NSCachedURLResponse cachedResponseForRequest..
Dragging an UIView inside UIScrollView http://stackoverflow.com/questions/1481826/dragging-an-uiview-inside-uiscrollview receiving touchesMoved invocations and scroll view starts scrolling instead. I noticed that this depends on the drag speed the faster I drag the quicker the tile falls . Any ideas on how to keep the tile glued to the dragging finger Thanks in..
http://stackoverflow.com/questions/1622729/double-vs-float-on-the-iphone am very interested in the issue because my program needs high precision calculations and I will have to compromise on speed. iphone cocoa touch floating point ieee 754 share improve this question The iPhone can do both single and double precision.. precision arithmetic in hardware. On the 1176 original iPhone and iPhone3G they operate at approximately the same speed though you can fit more single precision data in the caches. On the Cortex A8 iPhone3GS iPhone4 and iPad single precision..
Difference between iPhone Simulator and Android Emulator http://stackoverflow.com/questions/4544588/difference-between-iphone-simulator-and-android-emulator emulates the target device which is not true in case of simulator. I think Android emulator mimics the processing speed of the target device the memory usage but a simulator does not emulate the device. android iphone android emulator ios.. they otherwise have access to all of the host system's hardware resources such as disk space memory and processor speed. Apple always harps on the importance of device testing because iPhone Simulator does not emulate an iPhone processor disk..
Creating a JSON Store For iPhone http://stackoverflow.com/questions/5237943/creating-a-json-store-for-iphone and out of persistence it's integration with the rest of the API usually produces superior results when you factor in speed of development and reliability. In this particular case I can't tell from the description whether you are in case 2 or case..
What do I have to learn to get done with a 3D racing game for the iPhone? What Tools do I need? http://stackoverflow.com/questions/581784/what-do-i-have-to-learn-to-get-done-with-a-3d-racing-game-for-the-iphone-what-t with OpenGL ES and M3G . When it comes to Cocoa development in general it will take you a little while to get up to speed. For me it was about 6 months before I felt comfortable with it although that was in the more complex Mac desktop environment...
http://stackoverflow.com/questions/706344/lock-unlock-events-iphone even if your application stays awake while backgrounded there are no ways to determine that the screen is locked CPU speed doesn't report BUS speed remains the same mach_time denom numer doesn't change ... However it seems Apple does turn off.. stays awake while backgrounded there are no ways to determine that the screen is locked CPU speed doesn't report BUS speed remains the same mach_time denom numer doesn't change ... However it seems Apple does turn off the accelerometer when the..
http://stackoverflow.com/questions/72288/learning-opengl-es-1-x OpenGL ES 1.x What is the quickest way to come up to speed on OpenGL ES 1.x Let's assume I know nothing about OpenGL which is not entirely true but it's been a while since I last..
How can I get a precise time, for example in milliseconds in Objective-C? http://stackoverflow.com/questions/889380/how-can-i-get-a-precise-time-for-example-in-milliseconds-in-objective-c a time very precisely I need to calculate some delays between method calls. More specifically I want to calculate the speed of scrolling in an UIScrollView. iphone objective c cocoa touch uikit share improve this question NSDate and the timeIntervalSince..
Dispelling the UIImage imageNamed: FUD http://stackoverflow.com/questions/924740/dispelling-the-uiimage-imagenamed-fud for the convenience which has probably magnified the problem more than it should have been. whilst warning that On the speed front there is a general misunderstanding of what is going on. The biggest thing that imageNamed does is decode the image..
Why is my CLLocation speed so inaccurate? http://stackoverflow.com/questions/1180050/why-is-my-cllocation-speed-so-inaccurate to show the current speed in my Application. There are so many Apps that can do that really precise espacially for low Speeds like running or biking. The Best I´ve seen is RunKeeper. But in my Application the Speed is absolutely inaccurate. In Low.. precise espacially for low Speeds like running or biking. The Best I´ve seen is RunKeeper. But in my Application the Speed is absolutely inaccurate. In Low Speeds is always null and only at higher speeds it shows some values but they are rarely.. running or biking. The Best I´ve seen is RunKeeper. But in my Application the Speed is absolutely inaccurate. In Low Speeds is always null and only at higher speeds it shows some values but they are rarely updated and noot really usefull. void..
http://stackoverflow.com/questions/1391589/cllocation-speed and check the distance changed from the last poll and use the manual method also shown below to calculate the speed. Speed is calculated provided in m s so multiply by 3.6 for kph or 2.23693629 for mph. void locationManager CLLocationManager manager.. newLocation fromLocation CLLocation oldLocation simply get the speed provided by the phone from newLocation double gpsSpeed newLocation.speed alternative manual method if oldLocation nil CLLocationDistance distanceChange newLocation getDistanceFrom..
http://stackoverflow.com/questions/14561579/ios-device-bluetooth the iPhone iPad depending on the profile you use and the remote device What you have mentioned is for BT 3.0 HS High Speed 24 Mbps etc is achieved by using the 802.11 as the underlying mac for Bluetooth stack profiles. High Speed is not supported.. 3.0 HS High Speed 24 Mbps etc is achieved by using the 802.11 as the underlying mac for Bluetooth stack profiles. High Speed is not supported on the iPhone iPad. BT 4.0 in LE mode is primarily for sensor devices that need very low power so data..
AVAudioPlayer: How to Change the Playback Speed of Audio? http://stackoverflow.com/questions/2350657/avaudioplayer-how-to-change-the-playback-speed-of-audio How to Change the Playback Speed of Audio I want to control the playback speed of audio in AVAudioplayer . Is this possible If so how would you do it iphone..
iPhone UIScrollView Speed Check http://stackoverflow.com/questions/3719753/iphone-uiscrollview-speed-check UIScrollView Speed Check I know how to get the contentOffset on movement for a UIScrollView can someone explain to me how I can get an actual.. 0.1 CGFloat distance currentOffset.y lastOffset.y The multiply by 10 1000 isn't really necessary....... CGFloat scrollSpeedNotAbs distance 10 1000 in pixels per millisecond CGFloat scrollSpeed fabsf scrollSpeedNotAbs if scrollSpeed 0.5 isScrollingFast.. 1000 isn't really necessary....... CGFloat scrollSpeedNotAbs distance 10 1000 in pixels per millisecond CGFloat scrollSpeed fabsf scrollSpeedNotAbs if scrollSpeed 0.5 isScrollingFast YES NSLog @ Fast else isScrollingFast NO NSLog @ Slow lastOffset..
Saving Geotag info with photo on iOS4.1 http://stackoverflow.com/questions/3884060/saving-geotag-info-with-photo-on-ios4-1 gps setObject NSNumber numberWithFloat altitude forKey NSString kCGImagePropertyGPSAltitude Speed must be converted from m s to km h if location.speed 0 gps setObject @ K forKey NSString kCGImagePropertyGPSSpeedRef gps.. Speed must be converted from m s to km h if location.speed 0 gps setObject @ K forKey NSString kCGImagePropertyGPSSpeedRef gps setObject NSNumber numberWithFloat location.speed 3.6 forKey NSString kCGImagePropertyGPSSpeed Heading if location.course.. gps setObject NSNumber numberWithFloat location.speed 3.6 forKey NSString kCGImagePropertyGPSSpeed Heading if location.course 0 gps setObject @ T forKey NSString kCGImagePropertyGPSTrackRef gps setObject NSNumber numberWithFloat..
An -observeValueForKeyPath:ofObject:change:context: message was received but not handled http://stackoverflow.com/questions/4120539/an-observevalueforkeypathofobjectchangecontext-message-was-received-but-not MeasurementDescriptor objects describe a specific 'measurement' and 'unit' combination e.g. Temperature °C or Wind Speed mph . MeasurementDescriptors are something like singletons to the extent that there is only one for each unique measurement..
I want To track The Speed Of the fingure movement in pixel Per Second Is It Possible Any WaY? http://stackoverflow.com/questions/5075291/i-want-to-track-the-speed-of-the-fingure-movement-in-pixel-per-second-is-it-poss want To track The Speed Of the fingure movement in pixel Per Second Is It Possible Any WaY I want to track The speed Of the Touch moved in pixel.. yMove yMove NSLog @ TimeInterval f interval NSLog @ Move 5.2f 5.2f xMove yMove NSLog @ Distance 5.2f distance NSLog @ Speed 5.2f distance interval Apologies if I've made a faux pas with any memory management I'm still not very comfortable with..
Getting an image representation of the camera preview in UIImagePickerController http://stackoverflow.com/questions/601381/getting-an-image-representation-of-the-camera-preview-in-uiimagepickercontroller camera modal view all I get is the controls with black where the camera preview was. Anyone have a solution for this Speed is not an issue. iphone share improve this question Not possible from a documented api but possible. Find the PLCameraView..
How do I create delegates in Objective-C? http://stackoverflow.com/questions/626898/how-do-i-create-delegates-in-objective-c recommends this method because it is more precise doesn't mess with NSObject and can provide better tool support. Speed Optimizations Instead of checking whether a delegate responds to a selector every time we want to message it you can cache..
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