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2014/10/15 ¤U¤È 10:04:51
iphone Programming Glossary: calculatingFuzzy Date algorithm in Objective-C http://stackoverflow.com/questions/1052951/fuzzy-date-algorithm-in-objective-c Date algorithm in Objective C I would like to write a fuzzy date method for calculating dates in Objective C for iPhone. There is a popular explanation here http stackoverflow.com questions 11 how do i calculate..
String length with given font to fit UITextView 2 - The Return http://stackoverflow.com/questions/1095545/string-length-with-given-font-to-fit-uitextview-2-the-return method . However this doesn't work unless I subtract a fudge factor of 15 kFudgeFactor from the field width when calculating the string's height. If I don't do that the string returned is actually too long for the field and displays in an extra..
Get tableView:heightForRowAtIndexPath: to happen after tableView:cellForRowAtIndexPath:? http://stackoverflow.com/questions/1352801/get-tableviewheightforrowatindexpath-to-happen-after-tableviewcellforrowatind I've got some UITableViewCells that need to change their height depending on the length of the strings inside. I'm calculating the necessary height inside tableView cellForRowAtIndexPath and then storing it in a variable self.specialRowHeight . Then..
iphone: Calculating battery life http://stackoverflow.com/questions/1469549/iphone-calculating-battery-life Calculating battery life Wondering if there are references beyond the Apple tech stats for calculating battery life. I've tried comparing some existing battery apps battery left Apple's figures and I dont come up with the same..
Control cursor position in UITextField http://stackoverflow.com/questions/1500233/control-cursor-position-in-uitextfield cursor position in a UITextField is complicated because so many abstractions are involved with input boxes and calculating positions. However it's certainly possible. You can use the member function setSelectedTextRange input setSelectedTextRange..
color replacement in image for iphone application http://stackoverflow.com/questions/15082025/color-replacement-in-image-for-iphone-application cvMerge hChannel sChannel vChannel null dest cvCvtColor dest dest CV_HSV2BGR cvSaveImage output.png dest method to for calculating threshold CvScalar getScaler CvScalar seed boolean plus if plus return CV_RGB seed.red seed.red thresold seed.green seed.green..
Measuring velocity via iPhone SDK http://stackoverflow.com/questions/1994018/measuring-velocity-via-iphone-sdk example that demonstrates using low high pass filtering etc. but I have not seen a good example anywhere that shows calculating velocity. Does anyone have any real world experience with this they can share Code would be fantastic but really I just..
Laying out & sizing of subviews in a UIViewController http://stackoverflow.com/questions/2037716/laying-out-sizing-of-subviews-in-a-uiviewcontroller sizes of anything. Within the viewWillAppear method the view does know it's proper size but that would mean setting calculating the subview's frames every time the view will appear e.g. tab changes or popping from child view controllers on the navigation..
How to efficiently show many Images? (iPhone programming) http://stackoverflow.com/questions/2507441/how-to-efficiently-show-many-images-iphone-programming release Please notice that the images are only 17px 1px small and model.lasers is a internal array to do all the calculating seperated from graphical output. So in my main drawing loop I set all the UIImageView's positions to the calculated positions..
http://stackoverflow.com/questions/3729690/draw-part-of-a-circle application I want to draw a circle that is only for an x percentage filled. Something like this I have no problems calculating the radius the degrees or the radians that is no problem. Also drawing the circle is already done. But how do I get the..
CLLocation Category for Calculating Bearing w/ Haversine function http://stackoverflow.com/questions/3925942/cllocation-category-for-calculating-bearing-w-haversine-function changes that were accepted as a correct answer and the webpage it references http stackoverflow.com questions 3809337 calculating bearing between two cllocationcoordinate2ds http www.movable type.co.uk scripts latlong.html Thanks for any pointers. I've..
Compensating compass lag with the gyroscope on iPhone 4 http://stackoverflow.com/questions/4212988/compensating-compass-lag-with-the-gyroscope-on-iphone-4 you need to re calibrate the value for several interval. In my case every 5 second. I've experiment with gyro for calculating angle between two plane i try with exacly 90 degree ruler and it will give an error about 0.5 degree every second try and..
Iphone - when to calculate heightForRowAtIndexPath for a tableview when each cell height is dynamic? http://stackoverflow.com/questions/4823197/iphone-when-to-calculate-heightforrowatindexpath-for-a-tableview-when-each-cel height for each row in heightForRowAtIndexPath The most obvious first idea is to calculate the height for each cell by calculating and then summing the heights of each view inside the cell inside of cellForRowAtIndexPath and store that final total height..
iPhone FFT with Accelerate framework vDSP http://stackoverflow.com/questions/6358764/iphone-fft-with-accelerate-framework-vdsp
Using UIPinchGestureRecognizer to scale uiviews in single direction http://stackoverflow.com/questions/6759028/using-uipinchgesturerecognizer-to-scale-uiviews-in-single-direction return CGPointMake point2.x point1.x point2.y point1.y EDIT2 about the formula to calculate the scaling The idea is calculating the variation in the scale factor and apply it to the two directions x and y according to their relative variations. the..
GCD, Threads, Program Flow and UI Updating http://stackoverflow.com/questions/7290931/gcd-threads-program-flow-and-ui-updating trying to find the number of solutions min moves and such I would like to keep the UI updated. Then once it's finished calculating re enable the button and change the title. Below is some sample code from the button selector and the solving function Please.. trying to do. Basicly user presses a button that button is ENABLED NO Function called to calculate puzzle. While it's calculating keep the UI Labels updated with moves solution data. Then once it's finished calculating the puzzle Button is ENABLED YES.. calculate puzzle. While it's calculating keep the UI Labels updated with moves solution data. Then once it's finished calculating the puzzle Button is ENABLED YES Called when button is pressed void solvePuzzle id sender solveButton.enabled NO solveButton.title..
iPhone: Sorting based on location http://stackoverflow.com/questions/9308020/iphone-sorting-based-on-location Latitude 30.2584499 Longitude 92.4135357 I need to sort users based on the location who is nearby to my location by calculating latitude and longitude. I am not able to achieve this till now. Could someone help me on giving some samples UPDATED I am..
Scaling AR pictures based on the distance from the camera http://stackoverflow.com/questions/11913355/scaling-ar-pictures-based-on-the-distance-from-the-camera the dimensions of the CCD sesnor . What's more these values also helped me calculate a proper FOV for my AR app see Calculating a camera's angle of view . This website helped me calculate the size in millimeters of a physical object image produced..
iphone: Calculating battery life http://stackoverflow.com/questions/1469549/iphone-calculating-battery-life Calculating battery life Wondering if there are references beyond the Apple tech stats for calculating battery life. I've tried comparing..
http://stackoverflow.com/questions/2136051/calculating-multiline-text-height-for-uilabel-uitableviewcell-different-results multiline text height for UILabel UITableViewCell different results when calculating vs actual drawing This general topic..
How to detect iPhone movement in space using accelerometer? http://stackoverflow.com/questions/2674717/how-to-detect-iphone-movement-in-space-using-accelerometer acceleration.y gravity.y gravityNorm filteredAcceleration.z acceleration.z gravity.z gravityNorm Calculating velocity related to time interval velocity.x velocity.x filteredAcceleration.x interval velocity.y velocity.y filteredAcceleration.y..
CLLocation Category for Calculating Bearing w/ Haversine function http://stackoverflow.com/questions/3925942/cllocation-category-for-calculating-bearing-w-haversine-function Category for Calculating Bearing w Haversine function I'm trying to write a category for CLLocation to return the bearing to another CLLocation...
Calculating pixel size on an iPhone http://stackoverflow.com/questions/610193/calculating-pixel-size-on-an-iphone pixel size on an iPhone Is there a way in the iPhone SDK to calculate the size in millimeters of a single pixel iphone..
How to get angle between two POI? http://stackoverflow.com/questions/6140045/how-to-get-angle-between-two-poi this question I'm guessing you try to calculate the degrees between the coordinates of two points of interest POI . Calculating the arc of a great circle float greatCircleFrom CLLocation first to CLLocation second int radius 6371 6371km is the radius..
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 distance in pixels with a distance calculated with the geolocation coordinates. I am trying to relate them as follows Calculating the distance in pixels of a known point in my map. Calculating the distance using vector distance calculation for two reference.. coordinates. I am trying to relate them as follows Calculating the distance in pixels of a known point in my map. Calculating the distance using vector distance calculation for two reference points. Equaling the two above to find the actual distance..
How can I locally detect iPhone clock advancement by a user between app runs? http://stackoverflow.com/questions/7122216/how-can-i-locally-detect-iphone-clock-advancement-by-a-user-between-app-runs Take a look at this questions iOS How to measure passed time independent of clock and time zone changes Calculating number of seconds between two points in time in Cocoa even when system clock has changed mid way CACurrentMediaTime uses..
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