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2014/10/15 ¤U¤È 10:15:59
iphone Programming Glossary: wiseiPhone Obj-C: Anonymous Category or “private” Category? http://stackoverflow.com/questions/1052233/iphone-obj-c-anonymous-category-or-private-category Obj C Anonymous Category or &ldquo private&rdquo Category Style wise and functionally if there is any difference for declaring private methods which of these is better @interface MyClass @interface..
Cocoa Touch: When does an NSFetchedResultsController become necessary to manage a Core Data fetch? http://stackoverflow.com/questions/1263723/cocoa-touch-when-does-an-nsfetchedresultscontroller-become-necessary-to-manage Data backing. In every case I've used it for it significantly reduced the amount of code I had to write. Performance wise it can lead to a huge improvement as well. Rather than fetching in your entire data set if you use setFetchBatchSize with..
http://stackoverflow.com/questions/14659563/to-drawrect-or-not-to-drawrect-when-should-one-use-drawrect-core-graphics-vs-su I start seeing that drawRect is often responsible for poor responsiveness in an app is extremely expensive memory wise and really taxes the CPU. Basically that I should Avoid overriding drawRect WWDC 2012 iOS App Performance Graphics and Animations..
color replacement in image for iphone application http://stackoverflow.com/questions/15082025/color-replacement-in-image-for-iphone-application could not understand logic and not sure about my code implementation from step 3. Please find below code for each step wise with my understanding. 1 Convert the image from RGB to HSV using cvCvtColor we only want to change the hue . IplImage mainImage..
Paging UIScrollView in increments smaller than frame size http://stackoverflow.com/questions/1677085/paging-uiscrollview-in-increments-smaller-than-frame-size iphone uiscrollview share improve this question Try making your scrollview less than the size of the screen width wise but uncheck the Clip Subviews checkbox in IB. Then overlay a transparent userInteractionEnabled NO view on top of it at..
UITableView : crash when adding a section footer view in empty section http://stackoverflow.com/questions/1893712/uitableview-crash-when-adding-a-section-footer-view-in-empty-section a question here but I have to say this site has been a tremendous help for me over the last couple months iphone dev wise and I thank you for that. However I didn't find any solution for this problem I'm having I have a UITableView with 2 sections..
ABBYY Mobile OCR Engine for Iphone [closed] http://stackoverflow.com/questions/1980756/abbyy-mobile-ocr-engine-for-iphone ocr abbyy share improve this question I couldn't find anyone who actually used the mobile SDK however pricing wise I think I got an idea. It's around 15K 20 off of the revenue after Apple takes 30 so you are left with 50 . share improve..
CoreData (for iphone) storing images http://stackoverflow.com/questions/2131722/coredata-for-iphone-storing-images for iphone storing images i wonder if its a wise choice to store images with core data into binary property say i have a collection of movies and i want to save the image..
Is there a better way to determine the right size for a UITableViewCell? http://stackoverflow.com/questions/272584/is-there-a-better-way-to-determine-the-right-size-for-a-uitableviewcell laying it out getting ready to display is not wasted effort. Note you do not have to do your layout separately logic wise. Just make a call to your self prepLayoutForCellAtIndex index within your heightForRowAtIndexPath routine. If the data is..
Reduce UIImage size to a manageable size (reduce bytes) http://stackoverflow.com/questions/487316/reduce-uiimage-size-to-a-manageable-size-reduce-bytes The second parameter is the image quality of the JPEG. Both of these should produce images that are smaller memory wise than your UIImage. Resizing a UIImage to create a smaller thumbnail pixels wise using published methods is a little trickier... produce images that are smaller memory wise than your UIImage. Resizing a UIImage to create a smaller thumbnail pixels wise using published methods is a little trickier. _imageScaledToSize is from the private API and I'd highly recommend you not..
iPhone SDK: How do I pass an array of values from a ViewController onto other ViewController? http://stackoverflow.com/questions/5076878/iphone-sdk-how-do-i-pass-an-array-of-values-from-a-viewcontroller-onto-other-vi object of a SecondViewController . So you need to use that object for displaying the SecondeViewController other wise how can it won't show the array. Check the following code. In the FirstViewController void buttonClicked id sender SecondViewController..
How to Maintain VOIP socket connection in background? http://stackoverflow.com/questions/5987495/how-to-maintain-voip-socket-connection-in-background
NSURLConnection download large file (>40MB) http://stackoverflow.com/questions/6215095/nsurlconnection-download-large-file-40mb server this file will be ZIP or PDF. I achieved it using NSURLConnection that works well if the file is smaller other wise it download a part of the fill and the execution has stopped. for example I tried to download 36MB PDF file but but 16MB..
Core Data vs. SQLite for SQL experienced developers http://stackoverflow.com/questions/840634/core-data-vs-sqlite-for-sql-experienced-developers to SQL. At least for databases of the size you could fit on an iPhone it's certainly been adequate performance wise in my experience. I think the SQL vs. Core Data question is slightly misguided however. Once you get the result of a query..
http://stackoverflow.com/questions/8708543/get-selected-value-of-a-picker-view-that-is-present-in-different-view-and-use-th NSString getQuery NSString stringWithFormat @ SELECT FROM reminders WHERE Grp 'Friends' GROUP BY Name Event Date Like wise for group family office and acquaintances.Hence for shifting the context of bad programming to a good programming habit..
Retrieve month part from date saved in sqlite database table for displaying month wise data http://stackoverflow.com/questions/8725685/retrieve-month-part-from-date-saved-in-sqlite-database-table-for-displaying-mont month part from date saved in sqlite database table for displaying month wise data hope every one is doing well I have struck with retrieving the month from the date that is saved in sqlite database.First.. including date in a controller page say View Reminder page. Now I have a view controller for the user to view month wise say if the user selects month January from picker view it will navigate to view controller where I display the reminders..
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 programming a CPU intensive or GPU intensive application on the iPhone or other portable hardware you have to make wise algorithmic decisions to make your code fast. But even great algorithm choices can be slow if the language you're using..
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