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2014/10/15 ¤U¤È 10:05:20
iphone Programming Glossary: comparingHow do I break down an NSTimeInterval into year, months, days, hours, minutes and seconds on iPhone? http://stackoverflow.com/questions/1237778/how-do-i-break-down-an-nstimeinterval-into-year-months-days-hours-minutes-an . Create 2 NSDate whose difference is the NSTimeInterval you want to break down. If your NSTimeInterval comes from comparing 2 NSDate you don't need to do this step and you don't even need the NSTimeInterval just apply the dates to the NSCalendar..
How to detect iPhone 5 (widescreen devices)? http://stackoverflow.com/questions/12446990/how-to-detect-iphone-5-widescreen-devices bounds .size.height double 568 DBL_EPSILON The use of fabs with the epsilon is here to prevent precision errors when comparing floating points as pointed in the comments by H2CO3. So from now on you can use it in standard if else statements if IS_IPHONE_5..
iphone: Calculating battery life http://stackoverflow.com/questions/1469549/iphone-calculating-battery-life 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 answers sometimes. Also there are..
Strange problem comparing floats in objective-C http://stackoverflow.com/questions/1614533/strange-problem-comparing-floats-in-objective-c problem comparing floats in objective C At some point in an algorithm I need to compare the float value of a property of a class to a float... casting floating point share improve this question I believe having not found the standard that says so that when comparing a float to a double the float is cast to a double before comparing. Floating point numbers without a modifier are considered.. not found the standard that says so that when comparing a float to a double the float is cast to a double before comparing. Floating point numbers without a modifier are considered to be double in C. However in C there is no exact representation..
Comparing two NSDates and ignoring the time component http://stackoverflow.com/questions/1854890/comparing-two-nsdates-and-ignoring-the-time-component two NSDates and ignoring the time component What is the most efficient recommended way of comparing two NSDates I would like to be able to see if both dates are on the same day irrespective of the time and have started writing..
iPhone Store Kit “Cannot connect to iTunes Store” http://stackoverflow.com/questions/2359739/iphone-store-kit-cannot-connect-to-itunes-store this question I assume you've done the standard sanity checks double checking your code confirming your product IDs comparing your code to the In App Purchase Programming Guide etc. This may be ridiculous but if you're certain your code is correct..
http://stackoverflow.com/questions/4707858/basic-drag-and-drop-in-ios
Comparing float and double data types in objective C http://stackoverflow.com/questions/5024913/comparing-float-and-double-data-types-in-objective-c something like float f 4.2 if f 4.2 this block of code is not executed. f is exactly 4.19999980926513671875 but you're comparing it to the double precision literal 4.2 which has the value 4.20000000000000017763568394002504646778106689453125 so the comparison..
How to check what day of the week it is (i.e. Tues, Fri?) and compare two NSDates? http://stackoverflow.com/questions/583692/how-to-check-what-day-of-the-week-it-is-i-e-tues-fri-and-compare-two-nsdate of the week Check if a day has gone by based on the date I'm not sure what the best way to solve this is since when comparing two NSDates one at 1 1 09 at 21 30 and another at 1 2 09 at 00 30 I can't just see if 24 hours has gone by since in this..
How to compare two NSDates: Which is more recent? http://stackoverflow.com/questions/5965044/how-to-compare-two-nsdates-which-is-more-recent I came up with the following but I get unexpected results. I guess I'm doing something fundamentally wrong when comparing the two dates. I simply used the operators but I guess this is no good as I am comparing two NSDate strings. Here we go.. fundamentally wrong when comparing the two dates. I simply used the operators but I guess this is no good as I am comparing two NSDate strings. Here we go NSLog @ dB...lastModified @ dbObject.lastModifiedDate NSLog @ iP...lastModified @ self getDateOfLocalFile..
Store orientation to an array - and compare http://stackoverflow.com/questions/6368618/store-orientation-to-an-array-and-compare the right way for me here. But I'm not that smart apparently so if anyone could help me out with the first steps with comparing to arrays I would be a happy man Thanks iphone android math artificial intelligence gesture recognition share improve.. 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 between A i and B j . I simply used ABS A i B j . The cost matrices for this..
http://stackoverflow.com/questions/6488732/how-does-one-compare-one-image-to-another-to-see-if-they-are-similar-by-a-certai question As a quick simple algorithm I'd suggest iterating through about 1 of the pixels in each image and either comparing them directly against each other or keeping a running average and then comparing the two average color values at the end... the pixels in each image and either comparing them directly against each other or keeping a running average and then comparing the two average color values at the end. You can look at this answer for an idea of how to determine the color of a pixel..
How can we programmatically detect which iOS version is device running on? [duplicate] http://stackoverflow.com/questions/7848766/how-can-we-programmatically-detect-which-ios-version-is-device-running-on like this Both values floatValue intValue will be stripped due to its type 5.0.1 will become 5.0 or 5 float or int for comparing precisely you will have to separate it to array of INTs check accepted answer here Check iPhone iOS Version NSString ver..
Will my iPhone app take a performance hit if I use Objective-C for low level code? http://stackoverflow.com/questions/926728/will-my-iphone-app-take-a-performance-hit-if-i-use-objective-c-for-low-level-cod algorithm choices can be slow if the language you're using performs more poorly than another. Is there any hard data comparing Objective C to C specifically on the iPhone but maybe just on the Mac desktop for performance of various similar language.. maybe just on the Mac desktop for performance of various similar language aspects I am very familiar with this article comparing C and Objective C but this is a larger question of comparing two object oriented languages to each other. For example is.. language aspects I am very familiar with this article comparing C and Objective C but this is a larger question of comparing two object oriented languages to each other. For example is a C vtable lookup really faster than an Obj C message How much..
iOS : comparing the two images http://stackoverflow.com/questions/10055739/ios-comparing-the-two-images
iPhone Accelerate Framework FFT vs Matlab FFT http://stackoverflow.com/questions/10820488/iphone-accelerate-framework-fft-vs-matlab-fft 7 8 1.5913 Unpacked output 0 136 0 1 8 40.2187 2 8 19.3137 3 8 11.9728 4 8 8 5 8 5.34543 6 8 3.31371 7 8 1.5913 8 8 0 Comparing with Octave we get octave 3.4.0 15 x 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 x 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 octave..
Why isn't my String comparison working in iOS 6? [duplicate] http://stackoverflow.com/questions/12762444/why-isnt-my-string-comparison-working-in-ios-6 to do colorpicker self doColorPicker iphone ios6 share improve this question Because it never really worked. Comparing strings doesn't work using the operator since strings NSString objects are pointers doing a numerical comparison only compares..
http://stackoverflow.com/questions/1475636/comparing-two-arrays Two Arrays I have two NSArrays what I'm looking to do is to compare two arrays which contain strings find the similarities..
Comparing two NSDates and ignoring the time component http://stackoverflow.com/questions/1854890/comparing-two-nsdates-and-ignoring-the-time-component two NSDates and ignoring the time component What is the most efficient recommended way of comparing two NSDates I would..
Cocoa Touch - Comparing Images http://stackoverflow.com/questions/3400707/cocoa-touch-comparing-images Touch Comparing Images How can I compare an image to another one Thanks iphone cocoa touch uiimage share improve this question If..
iphone / Objective C - Comparing doubles not working http://stackoverflow.com/questions/4732645/iphone-objective-c-comparing-doubles-not-working Objective C Comparing doubles not working I think I'm going insane. counter and interval are both doubles. This is happening on accelerometer..
Comparing float and double data types in objective C http://stackoverflow.com/questions/5024913/comparing-float-and-double-data-types-in-objective-c float and double data types in objective C When using double or float data type in an iPhone app I am running into problems..
iPhone - Comparing strings with a German umlaut http://stackoverflow.com/questions/7656938/iphone-comparing-strings-with-a-german-umlaut Comparing strings with a German umlaut I've few German strings with umlauts like åä etc in NSArray. For example consider a word like..
Comparing two dates with nsdate http://stackoverflow.com/questions/7901061/comparing-two-dates-with-nsdate two dates with nsdate In my app I have to compare two times current which is 12 44 and given I tried NSDateFormatter dateFormatter..
http://stackoverflow.com/questions/8352466/comparing-text-in-uitextview text in UITextView How can we compare the text entered in UITextVIew with my default text in code to determine whether..
Creating a Time Based Reminder App in iPhone http://stackoverflow.com/questions/8892619/creating-a-time-based-reminder-app-in-iphone because i am stuck on this point. iphone objective c xcode nsdate date comparison share improve this question Comparing the current time vs. the user defined one is not the right design pattern. UIKit offers the NSLocalNotification object that..
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