iphone Programming Glossary: puts
NSBlockOperation or NSOperation with ALAsset Block to display photo-library images using ALAsset URL http://stackoverflow.com/questions/11580918/nsblockoperation-or-nsoperation-with-alasset-block-to-display-photo-library-imag simply fixed by wrapping the call with dispatch_async dispatch_get_main_queue ^ self.imageView.image topicImage This puts an asynchronous call on the main queue to update the UIImageView with the image. It's asynchronous so your other tasks can..
Objective-C/iPhone Memory Management Static Variables http://stackoverflow.com/questions/1606854/objective-c-iphone-memory-management-static-variables C iPhone Memory Management Static Variables I have a static method that creates an instance of the class and puts it in the static variable. I am wondering what the proper way of memory management is in this situation. You can't put it..
Resize UIImage with aspect ratio? http://stackoverflow.com/questions/1703100/resize-uiimage-with-aspect-ratio matches that of the new resized image. I'd like to modify this so that it keeps the correct aspect ratio and just puts a black background anywhere the image doesn't show up. So I would still end up with a 320x480 image but with black on the..
When should I initialize a view controller using initWithNibName? http://stackoverflow.com/questions/2224077/when-should-i-initialize-a-view-controller-using-initwithnibname like this MYViewController vc MYViewController alloc initWithNibName @ Myview bundle nil I say this is incorrect. It puts implementation details the name of the NIB and the fact that a NIB is even used into the caller. That breaks encapsulation...
Enable iPhone accelerometer while screen is locked http://stackoverflow.com/questions/2529422/enable-iphone-accelerometer-while-screen-is-locked One trick I use in an app is to enable the proximity sensor. This allows my app to continue running but if the user puts their phone in their pocket or otherwise trips the sensor the screen turns off and doesn't consume power. Meanwhile my app..
iPhone OS 4 Multitasking - Playing Audio In background http://stackoverflow.com/questions/3007527/iphone-os-4-multitasking-playing-audio-in-background
Exit application in iOS 4.0 http://stackoverflow.com/questions/3097244/exit-application-in-ios-4-0 programmatically exiting the application was not accepted. now everything changed in iOS4.0 clicking the home button puts your app in a suspended mode multitasking .. and I think there should be a clear way for the user to exit the app like an..
iPhone proper usage of Application Delegate http://stackoverflow.com/questions/338734/iphone-proper-usage-of-application-delegate Jason Coco suggested routing through the Application Controller. In my programs I normally avoid this as I think it puts too much responsibility at the top level I think things should self manage where possible and that higher level management..
Decode sha1 string to normal string http://stackoverflow.com/questions/3492317/decode-sha1-string-to-normal-string it usable again NSData out NSData dataWithBytes digest length CC_SHA1_DIGEST_LENGTH description converts to hex but puts around it and spaces every 4 bytes NSString hash out description hash hash stringByReplacingOccurrencesOfString @ withString..
Build fat static library (device + simulator) using Xcode and SDK 4+ http://stackoverflow.com/questions/3520977/build-fat-static-library-device-simulator-using-xcode-and-sdk-4 untick Show environment variables in build log if you're using a custom build output directory for XCode4 then XCode puts all your unexpected files in the wrong place. Build the project Click on the last icon on the right in the top left area..
Sha256 in Objective-C for iPhone http://stackoverflow.com/questions/3709204/sha256-in-objective-c-for-iphone self length hash NSData sha2 NSData dataWithBytes hash length CC_SHA256_DIGEST_LENGTH description converts to hex but puts around it and spaces every 4 bytes NSString hash sha2 description hash hash stringByReplacingOccurrencesOfString @ withString..
MPMoviePlayerController vs. MPMoviePlayerViewController http://stackoverflow.com/questions/4056844/mpmovieplayercontroller-vs-mpmovieplayerviewcontroller view controller subclass that takes care of presentation of the MPMoviePlayerController...as documentation at apple puts it An MPMoviePlayerController instance or movie player manages the playback of a movie from a file or a network stream...
UIView backgroundColor disappears when UITableViewCell is selected http://stackoverflow.com/questions/5222736/uiview-backgroundcolor-disappears-when-uitableviewcell-is-selected once I figure it out . Re assert the background colors in didSelectRowAtIndexPath . This is not so great because it puts what should be instance code outside the instance. It has the upside that it is only called when it is needed as opposed.. there is a lot of unnecessary background re assertions and a lot of extra processing overhead. On the bright side it puts the code inside the UITableViewCell subclass which is nice. Unfortunately re asserting the background colors in setHighlighted..
Suspend the application http://stackoverflow.com/questions/5360846/suspend-the-application a correction. A screen provides feedback that reassures users that there ™s nothing wrong with your application. It puts users in control letting them decide whether they want to take corrective action and continue using your application or..
iPhone and HMAC-SHA-1 encoding http://stackoverflow.com/questions/735714/iphone-and-hmac-sha-1-encoding it. using this example what is the NSData keyData NSData clearTextData what do i need to pass for these two values inputs NSData keyData NSData clearTextData uint8_t digest CC_SHA1_DIGEST_LENGTH 0 CCHmacContext hmacContext CCHmacInit hmacContext.. it usable again NSData out NSData dataWithBytes digest length CC_SHA1_DIGEST_LENGTH description converts to hex but puts around it and spaces every 4 bytes NSString hash out description hash hash stringByReplacingOccurrencesOfString @ withString..
SMB/samba support on iOS? http://stackoverflow.com/questions/8032314/smb-samba-support-on-ios reference is whatever you see on the wire. WireShark Rules ... look at JCIFS for design inspiration such as how it puts the request and response into a map by MID and encodes and decodes frames. Then implement the following commands SMB_COM_NEGOTIATE..
call exit(0) in iphone app http://stackoverflow.com/questions/8491466/call-exit0-in-iphone-app a correction. A screen provides feedback that reassures users that there ™s nothing wrong with your application. It puts users in control letting them decide whether they want to take corrective action and continue using your application or..
UIScrollView image/photo viewer with paging enabled and zooming http://stackoverflow.com/questions/975708/uiscrollview-image-photo-viewer-with-paging-enabled-and-zooming 0 0 in the scrollview updating the contentsize etc. Then when you zoom back to 1.0f it adds the other views back and puts things all back in order. Anyway that project works perfectly in the simulator but on the device there is some nasty movement..
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