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2014/10/15 ¤U¤È 10:04:05
iphone Programming Glossary: assumeUIScrollView horizontal paging like Mobile Safari tabs http://stackoverflow.com/questions/1220354/uiscrollview-horizontal-paging-like-mobile-safari-tabs contain the UIScrollView and it's subviews. Essentially it should have the frame of what you would assume the UIScrollView would have under normal circumstances. Place the UIScrollView in the center of the..
iPad Web App: Detect Virtual Keyboard Using JavaScript in Safari? http://stackoverflow.com/questions/2593139/ipad-web-app-detect-virtual-keyboard-using-javascript-in-safari However I have found no way to detect when or whether the keyboard is shown. My first idea was to assume that the keyboard is visible when a text field has focus. However when an external keyboard is attached..
Universal iPhone/iPad application debug compilation error for iPhone testing http://stackoverflow.com/questions/2618889/universal-iphone-ipad-application-debug-compilation-error-for-iphone-testing OS 3.2 added the UISplitViewController and if you link it in as normal your application will assume those symbols exist on 3.0 where they don't. To weak link a framework find your application target in..
How To Make iPhone App compatible with multiple SDK (firmware) versions http://stackoverflow.com/questions/3027120/how-to-make-iphone-app-compatible-with-multiple-sdk-firmware-versions coming out soon I have already planned to include an iAd in a future update of an app of mine. I assume that this will make my app unusable for anyone on a firmware lower than 4.0. Is there a way to change..
http://stackoverflow.com/questions/3504173/detect-retina-display device is running iOS4 and if the UIScreen mainScreen .scale property is equal to 2.0. You CANNOT assume a device is running iOS4 if the scale property exists as the iPad 3.2 also contains this property. On..
iPhone - Backgrounding to poll for events http://stackoverflow.com/questions/4656214/iphone-backgrounding-to-poll-for-events wakeup executes the code for a while. According to Apple we have 30 seconds execution time left. I assume that background code like threads are being executed for nearly 30 seconds. This is useful code if you..
performSelector may cause a leak because its selector is unknown http://stackoverflow.com/questions/7017281/performselector-may-cause-a-leak-because-its-selector-is-unknown no longer used methods in the init copy family or attributed with ns_returns_retained Do nothing assume returned object value will be valid in local scope until inner most release pool is drained attributed.. most release pool is drained attributed with ns_returns_autoreleased The call to methodForSelector assumes that the return value of the method it's calling is an object but does not retain release it. So you..
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 used OpenGL..
Technology to write iPhone, BlackBerry and Android phone at the same time? [closed] http://stackoverflow.com/questions/821085/technology-to-write-iphone-blackberry-and-android-phone-at-the-same-time BlackBerry and Android I'm ignorant about the development environments for BB and Android but I assume they both support Java apps. I know that the iPhone would require an ObjectiveC portion as well as a..
UIScrollView horizontal paging like Mobile Safari tabs http://stackoverflow.com/questions/1220354/uiscrollview-horizontal-paging-like-mobile-safari-tabs as follows Create a UIView subclass i.e. ClipView that will contain the UIScrollView and it's subviews. Essentially it should have the frame of what you would assume the UIScrollView would have under normal circumstances. Place the UIScrollView in the center of the ClipView . Make sure the ClipView 's clipsToBounds is set to..
iPad Web App: Detect Virtual Keyboard Using JavaScript in Safari? http://stackoverflow.com/questions/2593139/ipad-web-app-detect-virtual-keyboard-using-javascript-in-safari to fit the remaining space when the keyboard is shown. However I have found no way to detect when or whether the keyboard is shown. My first idea was to assume that the keyboard is visible when a text field has focus. However when an external keyboard is attached to an iPad the virtual keyboard does not show up when a..
Universal iPhone/iPad application debug compilation error for iPhone testing http://stackoverflow.com/questions/2618889/universal-iphone-ipad-application-debug-compilation-error-for-iphone-testing weak link the UIKit framework. The UIKit framework in iPhone OS 3.2 added the UISplitViewController and if you link it in as normal your application will assume those symbols exist on 3.0 where they don't. To weak link a framework find your application target in Xcode inspect it and go to the General tab. At the bottom..
How To Make iPhone App compatible with multiple SDK (firmware) versions http://stackoverflow.com/questions/3027120/how-to-make-iphone-app-compatible-with-multiple-sdk-firmware-versions App compatible with multiple SDK firmware versions With iOS4 coming out soon I have already planned to include an iAd in a future update of an app of mine. I assume that this will make my app unusable for anyone on a firmware lower than 4.0. Is there a way to change that variables and the .xib file based on the user's firmware..
http://stackoverflow.com/questions/3504173/detect-retina-display display reliably on all iOS devices you need to check if the device is running iOS4 and if the UIScreen mainScreen .scale property is equal to 2.0. You CANNOT assume a device is running iOS4 if the scale property exists as the iPad 3.2 also contains this property. On an iPad running iOS3.2 scale will return 1.0 in 1x mode and..
iPhone - Backgrounding to poll for events http://stackoverflow.com/questions/4656214/iphone-backgrounding-to-poll-for-events some NSLog .. into your code. This means that this short wakeup executes the code for a while. According to Apple we have 30 seconds execution time left. I assume that background code like threads are being executed for nearly 30 seconds. This is useful code if you must sometimes check something. The doc says that all background..
performSelector may cause a leak because its selector is unknown http://stackoverflow.com/questions/7017281/performselector-may-cause-a-leak-because-its-selector-is-unknown used standard assumption Release new object values when no longer used methods in the init copy family or attributed with ns_returns_retained Do nothing assume returned object value will be valid in local scope until inner most release pool is drained attributed with ns_returns_autoreleased The call to methodForSelector.. object value will be valid in local scope until inner most release pool is drained attributed with ns_returns_autoreleased The call to methodForSelector assumes that the return value of the method it's calling is an object but does not retain release it. So you could end up creating a leak if your object is supposed to..
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 used OpenGL . I am most interested in learning this for iPhone related..
Technology to write iPhone, BlackBerry and Android phone at the same time? [closed] http://stackoverflow.com/questions/821085/technology-to-write-iphone-blackberry-and-android-phone-at-the-same-time or at least best practice to write an app that runs on iPhone BlackBerry and Android I'm ignorant about the development environments for BB and Android but I assume they both support Java apps. I know that the iPhone would require an ObjectiveC portion as well as a whole new UI . Has anyone done this iphone android blackberry..
iOS Image Orientation has Strange Behavior http://stackoverflow.com/questions/10600613/ios-image-orientation-has-strange-behavior the best fix for this problem be to just blow away imageOrientation as soon as the user is done taking an image. I assume Apple has the rotation behavior done for a reason right A few people suggested that this is an Apple defect. ... if you're..
How does the iOS app Display Recorder record the screen without using private API? http://stackoverflow.com/questions/11090184/how-does-the-ios-app-display-recorder-record-the-screen-without-using-private-ap is using IOSurface to sneak past sandbox restrictions to have raw screen access. It also uses UIGetScreenImage which I assume is for the second method of generating video. It also uses some IOKit functions and IOMobileFramebuffer functions. It looks..
UIScrollView horizontal paging like Mobile Safari tabs http://stackoverflow.com/questions/1220354/uiscrollview-horizontal-paging-like-mobile-safari-tabs ClipView that will contain the UIScrollView and it's subviews. Essentially it should have the frame of what you would assume the UIScrollView would have under normal circumstances. Place the UIScrollView in the center of the ClipView . Make sure..
Get notified when UITableView has finished asking for data? http://stackoverflow.com/questions/1483581/get-notified-when-uitableview-has-finished-asking-for-data have finished querying the data source as much as it needs to for the time being. However this seems rather nasty as I assume it is causing the data source to be asked for the same information twice once automatically and once because of the reloadData..
iPhone Store Kit “Cannot connect to iTunes Store” http://stackoverflow.com/questions/2359739/iphone-store-kit-cannot-connect-to-itunes-store It just fails with the above error. iphone objective c in app purchase storekit share improve this question I assume you've done the standard sanity checks double checking your code confirming your product IDs comparing your code to the..
iPad Web App: Detect Virtual Keyboard Using JavaScript in Safari? http://stackoverflow.com/questions/2593139/ipad-web-app-detect-virtual-keyboard-using-javascript-in-safari keyboard is shown. However I have found no way to detect when or whether the keyboard is shown. My first idea was to assume that the keyboard is visible when a text field has focus. However when an external keyboard is attached to an iPad the virtual..
Universal iPhone/iPad application debug compilation error for iPhone testing http://stackoverflow.com/questions/2618889/universal-iphone-ipad-application-debug-compilation-error-for-iphone-testing UIKit framework in iPhone OS 3.2 added the UISplitViewController and if you link it in as normal your application will assume those symbols exist on 3.0 where they don't. To weak link a framework find your application target in Xcode inspect it and..
How To Make iPhone App compatible with multiple SDK (firmware) versions http://stackoverflow.com/questions/3027120/how-to-make-iphone-app-compatible-with-multiple-sdk-firmware-versions versions With iOS4 coming out soon I have already planned to include an iAd in a future update of an app of mine. I assume that this will make my app unusable for anyone on a firmware lower than 4.0. Is there a way to change that variables and..
How to convert an NSString to hex values http://stackoverflow.com/questions/3056757/how-to-convert-an-nsstring-to-hex-values to convert an NSString to hex values I'd like to convert a regular NSString into an NSString with the what I assume are ASCII hex values and back. I need to produce the same output that the Java methods below do but I can't seem to find..
Behaviour for significant change location API when terminated/suspended? http://stackoverflow.com/questions/3421242/behaviour-for-significant-change-location-api-when-terminated-suspended location object even before you start location services. So my understanding is that if your app terminates and I assume if you don't call stopMonitoringSignificantLocationChanges from applicationWillTerminate you will get woken up with a UIApplicationLaunchOptionsLocationKey..
http://stackoverflow.com/questions/3504173/detect-retina-display need to check if the device is running iOS4 and if the UIScreen mainScreen .scale property is equal to 2.0. You CANNOT assume a device is running iOS4 if the scale property exists as the iPad 3.2 also contains this property. On an iPad running iOS3.2..
iPhone - Backgrounding to poll for events http://stackoverflow.com/questions/4656214/iphone-backgrounding-to-poll-for-events that this short wakeup executes the code for a while. According to Apple we have 30 seconds execution time left. I assume that background code like threads are being executed for nearly 30 seconds. This is useful code if you must sometimes check..
How to compare two NSDates: Which is more recent? http://stackoverflow.com/questions/5965044/how-to-compare-two-nsdates-which-is-more-recent 6903 207 ...iP is more up to date. iphone objective c cocoa touch nsdate share improve this question Let's assume two dates NSDate date1 NSDate date2 Then the following comparison will tell which is earlier later same if date1 compare..
performSelector may cause a leak because its selector is unknown http://stackoverflow.com/questions/7017281/performselector-may-cause-a-leak-because-its-selector-is-unknown object values when no longer used methods in the init copy family or attributed with ns_returns_retained Do nothing assume returned object value will be valid in local scope until inner most release pool is drained attributed with ns_returns_autoreleased.. scope until inner most release pool is drained attributed with ns_returns_autoreleased The call to methodForSelector assumes that the return value of the method it's calling is an object but does not retain release it. So you could end up creating..
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 used OpenGL . I am most interested..
What does the Xcode 4.2 preference “Support Wirelessly Connected Devices” do? http://stackoverflow.com/questions/7266391/what-does-the-xcode-4-2-preference-support-wirelessly-connected-devices-do
Is ARC really supported in iOS 4? The iOS 4.2 SDK is missing ARC-related symbols at linking time http://stackoverflow.com/questions/7747783/is-arc-really-supported-in-ios-4-the-ios-4-2-sdk-is-missing-arc-related-symbols iPhoneOS4.2.sdk usr lib find . type f xargs nm grep i _objc_retain ... crickets ... Does this mean that Apple lied I assume instead that I'm confused and doing something wrong but I can't figure out what. This is with the GM release of Xcode 4.2..
Technology to write iPhone, BlackBerry and Android phone at the same time? [closed] http://stackoverflow.com/questions/821085/technology-to-write-iphone-blackberry-and-android-phone-at-the-same-time that runs on iPhone BlackBerry and Android I'm ignorant about the development environments for BB and Android but I assume they both support Java apps. I know that the iPhone would require an ObjectiveC portion as well as a whole new UI . Has..
http://stackoverflow.com/questions/8482327/learning-opengles-2-0-on-ios 3D Programming Developing Graphical Applications with OpenGL ES but reading the Amazon reviews I saw that they either assume previous knowledge with OpenGL or are not written specifically for iOS. I know OpenGL should be easy to port but I'm looking.. that list. iPhone 3D Programming by Philip Rideout is a great book that covers both OpenGL ES 1.1 and 2.0. It does not assume that you know OpenGL ES and he does explain a good bit of the math and other fundamentals required to understand what he's..
NSURLRequest : Post data and read the posted page http://stackoverflow.com/questions/10300353/nsurlrequest-post-data-and-read-the-posted-page receivedData_ length NSString responeString NSString alloc initWithData receivedData_ encoding NSUTF8StringEncoding Assume lowercase if responeString isEqualToString @ true Deal with true return Deal with an error Method 2 Grand Central Dispatch.. Error @ error return NSString responeString NSString alloc initWithData receivedData encoding NSUTF8StringEncoding Assume lowercase if responeString isEqualToString @ true Deal with true return Deal with an error When dealing with UI updates..
Core Data: UITableView with multiple NSFetchedResultControllers http://stackoverflow.com/questions/2308487/core-data-uitableview-with-multiple-nsfetchedresultcontrollers doing this Thanks iphone cocoa touch uitableview core data nsfetchedresultscontrolle share improve this question Assume for a moment the following in your header code below will be slightly sloppy my apologies NSFetchedResultsController fetchedResultsController1..
iPhone SDK: Launching an app after call ends http://stackoverflow.com/questions/2312666/iphone-sdk-launching-an-app-after-call-ends UIScreen mainScreen .applicationFrame webview loadRequest NSURLRequest requestWithURL url webview.hidden YES Assume we are in a view controller and have access to self.view self.view addSubview webview webview release else On 3.0 and below..
Converting iPhone xib to iPad xib? http://stackoverflow.com/questions/2488280/converting-iphone-xib-to-ipad-xib changes I would have to make to my iphone apps to convert to iPad iphone ipad sdk xib share improve this question Assume you've the SDK with Xcode 3 Open IB. Open the XIB. File Create iPad version using autoresizing masks. share improve this..
When is an autoreleased object actually released? http://stackoverflow.com/questions/2498330/when-is-an-autoreleased-object-actually-released loop . But what defines a run loop in the application So I was wondering whether the following piece of code is right. Assume an object @implementation Test NSString functionA NSString stringA stringA NSString alloc initWithString @ Hello autorelease..
Getting a list of points from a UIBezierPath http://stackoverflow.com/questions/3051760/getting-a-list-of-points-from-a-uibezierpath one knows how to do that objective c iphone share improve this question You might try this UIBezierPath yourPath Assume this has some points in it CGPath yourCGPath yourPath.CGPath NSMutableArray bezierPoints NSMutableArray array CGPathApply..
Can I make POST or GET requests from an iphone application? http://stackoverflow.com/questions/319463/can-i-make-post-or-get-requests-from-an-iphone-application to get the same results as an HTTP POST or GET methods iphone objective c cocoa touch share improve this question Assume your class has a responseData instance variable then responseData NSMutableData data retain NSURLRequest request NSURLRequest..
iPhone - Draw transparent rectangle on UIView to reveal view beneath http://stackoverflow.com/questions/3800278/iphone-draw-transparent-rectangle-on-uiview-to-reveal-view-beneath this void drawRect CGRect rect Start by filling the area with the blue color UIColor blueColor setFill UIRectFill rect Assume that there's an ivar somewhere called holeRect of type CGRect We could just fill holeRect but it's more efficient to only..
iPhone Development Environment (from scratch) http://stackoverflow.com/questions/414636/iphone-development-environment-from-scratch so forgive my ignorance on this one. What would be the steps to setup an iPhone development environment from scratch Assume that I have nothing but electricity and an internet connection. What hardware and software would I need I'm talking about..
AVFoundation, how to turn off the shutter sound when captureStillImageAsynchronouslyFromConnection? http://stackoverflow.com/questions/4401232/avfoundation-how-to-turn-off-the-shutter-sound-when-capturestillimageasynchrono
http://stackoverflow.com/questions/4707858/basic-drag-and-drop-in-ios What are the drawbacks of different strategies iphone ipad ios drag and drop touch share improve this question Assume you have a UIView scene with a background image and many vehicles you may define each new vehicle as a UIButton UIImageView..
How can an iOS app keep a TCP connection alive indefinitely while in the background? http://stackoverflow.com/questions/5840365/how-can-an-ios-app-keep-a-tcp-connection-alive-indefinitely-while-in-the-backgro are app user sends data to server and server responds data back. server might send data to app while it does nothing. Assume that if app does not send data to server for 30 minutes server will close the connection. I want to keep the connection..
how to cache a whole web page with images in iOS http://stackoverflow.com/questions/6696151/how-to-cache-a-whole-web-page-with-images-in-ios are some good examples of how to use it but I'll include one of them here for completeness IBAction loadURL NSURL url Assume request is a property of our controller First we'll cancel any in progress page load self request setDelegate nil self request..
http://stackoverflow.com/questions/6945964/uiscrollview-custom-paging consider the type of scroll view implemented in a slot machine. So say my UIScrollView has a width of 100 pixels. Assume it contains 3 inner views each with a width of 30 pixels such that they are separated by a width of 3 pixels. The type of..
Moving a Stick figure, anchorpoints, animation, or something else…? http://stackoverflow.com/questions/7808981/moving-a-stick-figure-anchorpoints-animation-or-something-else button or image to align a modified image ie artist update without modifying the node position. 1 Is easy to explain. Assume you have a full screen background image. To make it cover the entire screen you can do one of two things change the position.. move the background it's fine doing that. However for a scrolling background I wouldn't change the anchorPoint. 2 Assume your menu system calls for various buttons and images to be right aligned exactly with the right border of the screen. All..
Core Data's NSPrivateQueueConcurrencyType and sharing objects between threads http://stackoverflow.com/questions/8637921/core-datas-nsprivatequeueconcurrencytype-and-sharing-objects-between-threads solving this though You create one context that's associated with the main queue i.e. with NSMainQueueConcurrencyType Assume we have these two context They need to be set up. Assume they are. NSManagedObjectContext mainMOC NSManagedObjectContext.. with the main queue i.e. with NSMainQueueConcurrencyType Assume we have these two context They need to be set up. Assume they are. NSManagedObjectContext mainMOC NSManagedObjectContext alloc initWithConcurrencyType NSMainQueueConcurrencyType..
Best practices for handling user preferences in an iPhone MVC app? http://stackoverflow.com/questions/962591/best-practices-for-handling-user-preferences-in-an-iphone-mvc-app my first iPhone app and while implementing user preferences I have a few questions on how to best implement this. Assume the basic MVC pattern MainView displaying data stored in a Model object MainViewController handling the app logic. For the..
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