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2014/10/15 ¤U¤È 10:12:32
iphone Programming Glossary: performWhere to place the “Core Data Stack” in a Cocoa/Cocoa Touch application http://stackoverflow.com/questions/1267520/where-to-place-the-core-data-stack-in-a-cocoa-cocoa-touch-application in some situations as described in the documentation you might want to use a different context to perform a discrete set of actions. The appropriate unit of currency for a view controller is therefore usually..
“wait_fences: failed to receive reply: 10004003”? http://stackoverflow.com/questions/1371346/wait-fences-failed-to-receive-reply-10004003 viewDidAppear not viewWillAppear and make sure to call super viewDidAppear . You should not perform animations when you are not on screen will appear . And the viewDidAppear docs explain that you must..
Expand/collapse section in UITableView http://stackoverflow.com/questions/1938921/expand-collapse-section-in-uitableview collapse section in UITableView Could somebody tell me the way to perform UITableView expandable collapsible animations in sections of UITableView as below or iphone uitableview..
Do I need to disable NSLog before release Application? http://stackoverflow.com/questions/2025471/do-i-need-to-disable-nslog-before-release-application NSLog before release Application When releasing an app for iPhone if I disable NSLog will it perform better iphone nslog share improve this question One way to do it is to go into your Build settings..
iPhone image stretching (skew) http://stackoverflow.com/questions/2351586/iphone-image-stretching-skew the transformation. This indicates such a transform is not linear. Therefore CATransform3D cannot perform this as a 2D transform either. However the vector x y z w 1 will be converted to the actual 3D vector.. change the matrix elements instead of relying on the CATransform3DMake functions. You may need to perform a transpose due to convention of using row or column vectors. To obtain the transform to convert a rectangle..
How to intercept click on link in UITextView? http://stackoverflow.com/questions/2543967/how-to-intercept-click-on-link-in-uitextview to intercept click on link in UITextView Is it possible to perform custom action when user touch autodetected phone link in UITextView. Please do not advice to use UIWebView..
Landscape Mode ONLY for iPhone or iPad http://stackoverflow.com/questions/2647786/landscape-mode-only-for-iphone-or-ipad on the device ™s orientation. If your application runs in landscape mode only however you must perform the following steps to make it launch in a landscape orientation initially. In your application ™s Info.plist..
How can I launch the Google Maps iPhone application from within my own native application? http://stackoverflow.com/questions/30058/how-can-i-launch-the-google-maps-iphone-application-from-within-my-own-native-ap improve this question For iOS 5.1.1 and lower use the openURL method of UIApplication . It will perform the normal iPhone magical URL reinterpretation. so someUIApplication openURL NSURL URLWithString @ http..
Using the apple FFT and accelerate Framework http://stackoverflow.com/questions/3398753/using-the-apple-fft-and-accelerate-framework perspective like as in why would we be using this function in the first place Let's say we want to perform pitch detection on microphone input and we have set it up so that some callback gets triggered every..
How do I apply a perspective transform to a UIView? http://stackoverflow.com/questions/347721/how-do-i-apply-a-perspective-transform-to-a-uiview do I apply a perspective transform to a UIView I'm looking to perform a perspective transform on a UIView such as seen in coverflow Does anyonew know if this is possible.. this question As Ben said you'll need to work with the UIView's layer using a CATransform3D to perform the layer's rotation. The trick to get perspective working as described here is to directly access one..
iPhone - Backgrounding to poll for events http://stackoverflow.com/questions/4656214/iphone-backgrounding-to-poll-for-events @ ### VOIP backgrounding callback try to do sth. According to Apple we have ONLY 30 seconds to perform this Task Else the Application will be terminated UIApplication app UIApplication sharedApplication..
iOS: how to perform an HTTP POST request? http://stackoverflow.com/questions/5537297/ios-how-to-perform-an-http-post-request how to perform an HTTP POST request I'm approaching iOS development and I'd like to have one of my first applications.. POST request I'm approaching iOS development and I'd like to have one of my first applications to perform a HTTP POST request. As far as I can understand I should manage the connection which handles the request..
CADisplayLink OpenGL rendering breaks UIScrollView behaviour http://stackoverflow.com/questions/5944050/cadisplaylink-opengl-rendering-breaks-uiscrollview-behaviour of a UIScrollView when using NSRunLoopCommonModes for the CADisplayLink. One way around this is to perform your OpenGL ES rendering actions on a background thread by using a Grand Central Dispatch serial queue...
To ARC or not to ARC? What are the pros and cons? http://stackoverflow.com/questions/8760431/to-arc-or-not-to-arc-what-are-the-pros-and-cons during ObjC or C exception throws in ObjC code but this is at the cost of both time and space performance. This is yet another in a long list of reasons to minimize your use of ObjC . ARC will not work.. the rules when you start messing around with void pointers to id which you continue to need to perform KVO correctly . And blocks... well block memory management is just weird. So my point is that the underlying..
Faster alternative to glReadPixels in iPhone OpenGL ES 2.0 http://stackoverflow.com/questions/9550297/faster-alternative-to-glreadpixels-in-iphone-opengl-es-2-0 in the frame buffer to process the data further in CPU. Performance is important because I have to perform this operation repeatedly. I have searched the web and found some approach like using Pixel Buffer Object..
How to detect first time app launch on an iPhone http://stackoverflow.com/questions/9964371/how-to-detect-first-time-app-launch-on-an-iphone application didFinishLaunchingWithOptions NSDictionary launchOptions if very first launch than perform actionA else perform actionB method iphone ios share improve this question BOOL application UIApplication.. NSDictionary launchOptions if very first launch than perform actionA else perform actionB method iphone ios share improve this question BOOL application UIApplication application..
Where to place the “Core Data Stack” in a Cocoa/Cocoa Touch application http://stackoverflow.com/questions/1267520/where-to-place-the-core-data-stack-in-a-cocoa-cocoa-touch-application to access other parts of the stack if needs be. Moreover in some situations as described in the documentation you might want to use a different context to perform a discrete set of actions. The appropriate unit of currency for a view controller is therefore usually a managed object context otherwise a managed object. Using..
“wait_fences: failed to receive reply: 10004003”? http://stackoverflow.com/questions/1371346/wait-fences-failed-to-receive-reply-10004003 objective c cocoa touch share improve this question Override viewDidAppear not viewWillAppear and make sure to call super viewDidAppear . You should not perform animations when you are not on screen will appear . And the viewDidAppear docs explain that you must call super because they have their own things to do. share..
Expand/collapse section in UITableView http://stackoverflow.com/questions/1938921/expand-collapse-section-in-uitableview collapse section in UITableView Could somebody tell me the way to perform UITableView expandable collapsible animations in sections of UITableView as below or iphone uitableview share improve this question I'm pretty sure you'll..
Do I need to disable NSLog before release Application? http://stackoverflow.com/questions/2025471/do-i-need-to-disable-nslog-before-release-application I need to disable NSLog before release Application When releasing an app for iPhone if I disable NSLog will it perform better iphone nslog share improve this question One way to do it is to go into your Build settings and under the Debug configuration add a value to Preprocessor..
iPhone image stretching (skew) http://stackoverflow.com/questions/2351586/iphone-image-stretching-skew p1 and p3 and p2 and p4. Now notice the x y factor in the transformation. This indicates such a transform is not linear. Therefore CATransform3D cannot perform this as a 2D transform either. However the vector x y z w 1 will be converted to the actual 3D vector x w y w z w before projection if CA follows usual 3D compute.. struct CATransform3D CATransform3D So you can directly change the matrix elements instead of relying on the CATransform3DMake functions. You may need to perform a transpose due to convention of using row or column vectors. To obtain the transform to convert a rectangle X Y W H to any quadrilateral x1a y1a x2a y2a x3a y3a..
How to intercept click on link in UITextView? http://stackoverflow.com/questions/2543967/how-to-intercept-click-on-link-in-uitextview to intercept click on link in UITextView Is it possible to perform custom action when user touch autodetected phone link in UITextView. Please do not advice to use UIWebView instead. And please don't just repeat text from apple..
Landscape Mode ONLY for iPhone or iPad http://stackoverflow.com/questions/2647786/landscape-mode-only-for-iphone-or-ipad let its view controllers rotate the interface as needed based on the device ™s orientation. If your application runs in landscape mode only however you must perform the following steps to make it launch in a landscape orientation initially. In your application ™s Info.plist file add the UIInterfaceOrientation key and set its..
How can I launch the Google Maps iPhone application from within my own native application? http://stackoverflow.com/questions/30058/how-can-i-launch-the-google-maps-iphone-application-from-within-my-own-native-ap IN THE SIMULATOR. iphone objective c google maps share improve this question For iOS 5.1.1 and lower use the openURL method of UIApplication . It will perform the normal iPhone magical URL reinterpretation. so someUIApplication openURL NSURL URLWithString @ http maps.google.com maps q London should invoke the Google maps..
Using the apple FFT and accelerate Framework http://stackoverflow.com/questions/3398753/using-the-apple-fft-and-accelerate-framework value into the same space as the send value. To give some perspective like as in why would we be using this function in the first place Let's say we want to perform pitch detection on microphone input and we have set it up so that some callback gets triggered every time the microphone gets in 1024 floats. Supposing the microphone..
How do I apply a perspective transform to a UIView? http://stackoverflow.com/questions/347721/how-do-i-apply-a-perspective-transform-to-a-uiview do I apply a perspective transform to a UIView I'm looking to perform a perspective transform on a UIView such as seen in coverflow Does anyonew know if this is possible I've investigated using CALayer and have run through all the.. iphone ios cocoa touch core animation share improve this question As Ben said you'll need to work with the UIView's layer using a CATransform3D to perform the layer's rotation. The trick to get perspective working as described here is to directly access one of the matrix cells of the CATransform3D m34 . Matrix math..
iPhone - Backgrounding to poll for events http://stackoverflow.com/questions/4656214/iphone-backgrounding-to-poll-for-events this Handler will be called void backgroundHandler NSLog @ ### VOIP backgrounding callback try to do sth. According to Apple we have ONLY 30 seconds to perform this Task Else the Application will be terminated UIApplication app UIApplication sharedApplication NSArray oldNotifications app scheduledLocalNotifications Clear..
iOS: how to perform an HTTP POST request? http://stackoverflow.com/questions/5537297/ios-how-to-perform-an-http-post-request how to perform an HTTP POST request I'm approaching iOS development and I'd like to have one of my first applications to perform a HTTP POST request. As far as I can understand.. how to perform an HTTP POST request I'm approaching iOS development and I'd like to have one of my first applications to perform a HTTP POST request. As far as I can understand I should manage the connection which handles the request via a NSURLConnection object which forces me to have a..
CADisplayLink OpenGL rendering breaks UIScrollView behaviour http://stackoverflow.com/questions/5944050/cadisplaylink-opengl-rendering-breaks-uiscrollview-behaviour taking long enough for each frame to throw off the timing of a UIScrollView when using NSRunLoopCommonModes for the CADisplayLink. One way around this is to perform your OpenGL ES rendering actions on a background thread by using a Grand Central Dispatch serial queue. I did this in my recent update to Molecules source code..
To ARC or not to ARC? What are the pros and cons? http://stackoverflow.com/questions/8760431/to-arc-or-not-to-arc-what-are-the-pros-and-cons it incurs the penalties discussed below ARC will not leak memory during ObjC or C exception throws in ObjC code but this is at the cost of both time and space performance. This is yet another in a long list of reasons to minimize your use of ObjC . ARC will not work at all on iPhoneOS 3 or Mac OS X 10.5 or earlier. This precludes.. to know the rules for mixed ARC MRC code. And you need to know the rules when you start messing around with void pointers to id which you continue to need to perform KVO correctly . And blocks... well block memory management is just weird. So my point is that the underlying memory management is still important but where I used..
Faster alternative to glReadPixels in iPhone OpenGL ES 2.0 http://stackoverflow.com/questions/9550297/faster-alternative-to-glreadpixels-in-iphone-opengl-es-2-0 need read only access to a small rectangular rendering area in the frame buffer to process the data further in CPU. Performance is important because I have to perform this operation repeatedly. I have searched the web and found some approach like using Pixel Buffer Object and glMapBuffer but it seems that OpenGL ES 2.0 does not..
How to detect first time app launch on an iPhone http://stackoverflow.com/questions/9964371/how-to-detect-first-time-app-launch-on-an-iphone the very first time launch of BOOL application UIApplication application didFinishLaunchingWithOptions NSDictionary launchOptions if very first launch than perform actionA else perform actionB method iphone ios share improve this question BOOL application UIApplication application didFinishLaunchingWithOptions NSDictionary.. launch of BOOL application UIApplication application didFinishLaunchingWithOptions NSDictionary launchOptions if very first launch than perform actionA else perform actionB method iphone ios share improve this question BOOL application UIApplication application didFinishLaunchingWithOptions NSDictionary launchOptions if..
Where to place the “Core Data Stack” in a Cocoa/Cocoa Touch application http://stackoverflow.com/questions/1267520/where-to-place-the-core-data-stack-in-a-cocoa-cocoa-touch-application needs be. Moreover in some situations as described in the documentation you might want to use a different context to perform a discrete set of actions. The appropriate unit of currency for a view controller is therefore usually a managed object..
“wait_fences: failed to receive reply: 10004003”? http://stackoverflow.com/questions/1371346/wait-fences-failed-to-receive-reply-10004003 this question Override viewDidAppear not viewWillAppear and make sure to call super viewDidAppear . You should not perform animations when you are not on screen will appear . And the viewDidAppear docs explain that you must call super because..
Expand/collapse section in UITableView http://stackoverflow.com/questions/1938921/expand-collapse-section-in-uitableview collapse section in UITableView Could somebody tell me the way to perform UITableView expandable collapsible animations in sections of UITableView as below or iphone uitableview share improve..
Do I need to disable NSLog before release Application? http://stackoverflow.com/questions/2025471/do-i-need-to-disable-nslog-before-release-application I need to disable NSLog before release Application When releasing an app for iPhone if I disable NSLog will it perform better iphone nslog share improve this question One way to do it is to go into your Build settings and under the Debug..
iPhone image stretching (skew) http://stackoverflow.com/questions/2351586/iphone-image-stretching-skew the x y factor in the transformation. This indicates such a transform is not linear. Therefore CATransform3D cannot perform this as a 2D transform either. However the vector x y z w 1 will be converted to the actual 3D vector x w y w z w before.. So you can directly change the matrix elements instead of relying on the CATransform3DMake functions. You may need to perform a transpose due to convention of using row or column vectors. To obtain the transform to convert a rectangle X Y W H to..
How to intercept click on link in UITextView? http://stackoverflow.com/questions/2543967/how-to-intercept-click-on-link-in-uitextview to intercept click on link in UITextView Is it possible to perform custom action when user touch autodetected phone link in UITextView. Please do not advice to use UIWebView instead. And..
Landscape Mode ONLY for iPhone or iPad http://stackoverflow.com/questions/2647786/landscape-mode-only-for-iphone-or-ipad as needed based on the device ™s orientation. If your application runs in landscape mode only however you must perform the following steps to make it launch in a landscape orientation initially. In your application ™s Info.plist file add the..
How can I launch the Google Maps iPhone application from within my own native application? http://stackoverflow.com/questions/30058/how-can-i-launch-the-google-maps-iphone-application-from-within-my-own-native-ap google maps share improve this question For iOS 5.1.1 and lower use the openURL method of UIApplication . It will perform the normal iPhone magical URL reinterpretation. so someUIApplication openURL NSURL URLWithString @ http maps.google.com..
Using the apple FFT and accelerate Framework http://stackoverflow.com/questions/3398753/using-the-apple-fft-and-accelerate-framework value. To give some perspective like as in why would we be using this function in the first place Let's say we want to perform pitch detection on microphone input and we have set it up so that some callback gets triggered every time the microphone..
How do I apply a perspective transform to a UIView? http://stackoverflow.com/questions/347721/how-do-i-apply-a-perspective-transform-to-a-uiview do I apply a perspective transform to a UIView I'm looking to perform a perspective transform on a UIView such as seen in coverflow Does anyonew know if this is possible I've investigated using.. share improve this question As Ben said you'll need to work with the UIView's layer using a CATransform3D to perform the layer's rotation. The trick to get perspective working as described here is to directly access one of the matrix cells..
iPhone - Backgrounding to poll for events http://stackoverflow.com/questions/4656214/iphone-backgrounding-to-poll-for-events backgroundHandler NSLog @ ### VOIP backgrounding callback try to do sth. According to Apple we have ONLY 30 seconds to perform this Task Else the Application will be terminated UIApplication app UIApplication sharedApplication NSArray oldNotifications..
iOS: how to perform an HTTP POST request? http://stackoverflow.com/questions/5537297/ios-how-to-perform-an-http-post-request how to perform an HTTP POST request I'm approaching iOS development and I'd like to have one of my first applications to perform a HTTP.. to perform an HTTP POST request I'm approaching iOS development and I'd like to have one of my first applications to perform a HTTP POST request. As far as I can understand I should manage the connection which handles the request via a NSURLConnection..
CADisplayLink OpenGL rendering breaks UIScrollView behaviour http://stackoverflow.com/questions/5944050/cadisplaylink-opengl-rendering-breaks-uiscrollview-behaviour off the timing of a UIScrollView when using NSRunLoopCommonModes for the CADisplayLink. One way around this is to perform your OpenGL ES rendering actions on a background thread by using a Grand Central Dispatch serial queue. I did this in my..
To ARC or not to ARC? What are the pros and cons? http://stackoverflow.com/questions/8760431/to-arc-or-not-to-arc-what-are-the-pros-and-cons ARC will not leak memory during ObjC or C exception throws in ObjC code but this is at the cost of both time and space performance. This is yet another in a long list of reasons to minimize your use of ObjC . ARC will not work at all on iPhoneOS 3.. And you need to know the rules when you start messing around with void pointers to id which you continue to need to perform KVO correctly . And blocks... well block memory management is just weird. So my point is that the underlying memory management..
Faster alternative to glReadPixels in iPhone OpenGL ES 2.0 http://stackoverflow.com/questions/9550297/faster-alternative-to-glreadpixels-in-iphone-opengl-es-2-0 rendering area in the frame buffer to process the data further in CPU. Performance is important because I have to perform this operation repeatedly. I have searched the web and found some approach like using Pixel Buffer Object and glMapBuffer..
How to detect first time app launch on an iPhone http://stackoverflow.com/questions/9964371/how-to-detect-first-time-app-launch-on-an-iphone UIApplication application didFinishLaunchingWithOptions NSDictionary launchOptions if very first launch than perform actionA else perform actionB method iphone ios share improve this question BOOL application UIApplication application.. application didFinishLaunchingWithOptions NSDictionary launchOptions if very first launch than perform actionA else perform actionB method iphone ios share improve this question BOOL application UIApplication application didFinishLaunchingWithOptions..
Open Twitter Setting from ACAccountStore (iOS 5.1 TWITTER) http://stackoverflow.com/questions/11325266/open-twitter-setting-from-acaccountstore-ios-5-1-twitter nil requestMethod TWRequestMethodPOST Set the account used to post the tweet. postRequest setAccount twitterAccount Perform the request created above and create a handler block to handle the response. postRequest performRequestWithHandler ^ NSData..
iPhone- Twitter API GET Users Followers/Following http://stackoverflow.com/questions/11600621/iphone-twitter-api-get-users-followers-following accounts and Twitter may also return an error if you're doing too many requests twitterRequest setAccount account Perform the request for Twitter friends twitterRequest performRequestWithHandler ^ NSData responseData NSHTTPURLResponse urlResponse..
http://stackoverflow.com/questions/13023936/orientation-issue-in-ios-6 for the iPhone idiom.So device getting orientation changed by default. So Need To Perform Some Steps. 1 Set the Orientation From Here 2 Place This Code in FirstViewController added to the RootViewController @implementation..
Encrypted NSData to NSString in obj-c? http://stackoverflow.com/questions/1417893/encrypted-nsdata-to-nsstring-in-obj-c string and the passphrase to use for decrypting. Create an NSData from the first string then Base64 decode the data. Perform AES decryption on the data then create and return an NSString. It's really just a matter of chaining the two parts together..
How to search MKMapView with UISearchBar? http://stackoverflow.com/questions/2281798/how-to-search-mkmapview-with-uisearchbar France . 3 Code Method to handle the UISearchBar Search void searchBarSearchButtonClicked UISearchBar theSearchBar Perform the JSON query. self searchCoordinatesForAddress searchBar text Hide the keyboard. searchBar resignFirstResponder After..
iPhone app launch times and Core Data migration http://stackoverflow.com/questions/2860310/iphone-app-launch-times-and-core-data-migration migration to manual migration with a mapping model so that you can Easily back out of the migration if needed. Perform the migration in chunks in case the user quits your application. Give the user solid feedback on how far along the migration..
http://stackoverflow.com/questions/3558252/ios-keychain-security to the device. Theoretically it should be trivial to modify the jailbreak.me code and have it automate the following Perform the jailbreak as normal all this requires is for the user open a maliciously crafted PDF Run Fraunhofer's scripts after..
Best Way to Perform Several Sequential UIView Animations? http://stackoverflow.com/questions/3849460/best-way-to-perform-several-sequential-uiview-animations Way to Perform Several Sequential UIView Animations I have a series of 8 UIView animations that occur directly after my view is loaded...
How to Perform a Insert/Update With Core Data http://stackoverflow.com/questions/4102460/how-to-perform-a-insert-update-with-core-data to Perform a Insert Update With Core Data I've got the basics of inserting records and deleting records with Core Data however I'd..
Detect horizontal panning in UITableView http://stackoverflow.com/questions/5426306/detect-horizontal-panning-in-uitableview recognizer.state UIGestureRecognizerStateCancelled horizontalScrolling NO if horizontalScrolling Perform some code else Maybe pass the touch from here It's panning vertically So any advice on how to pass the touches Addition..
Custom transition between two UIViews http://stackoverflow.com/questions/5511514/custom-transition-between-two-uiviews self.view.transform transform UIApplication easybookDelegate rootViewController .view addSubview self.view Perform the animation later since implicit animations don't seem to work due to view B just being added above and hasn't had a chance..
facebook-ios-sdk logout question http://stackoverflow.com/questions/6226950/facebook-ios-sdk-logout-question like to know if it is possible have the following situation Enter in the app no accessToken expirationDate created . Perform a login using SSO by calling authorize delegate method application goes background and the login is made in the 'global'.. credentials. Enter back in the app now logged in both accessToken and expirationDate are saved to NSUserDefaults . Perform a logout by calling the logout method now logged out both accessToken and expirationDate are removed from NSUserDefaults..
Access to iPhone music library http://stackoverflow.com/questions/625625/access-to-iphone-music-library support lets you play all audio types supported by the iPod application. Construct queues of audio items to play back. Perform searches of the user ™s audio library. Access the user ™s playlists including smart on the go and genius playlists . For more..
Performing iPhone optimization on externally downloaded PNGs http://stackoverflow.com/questions/640909/performing-iphone-optimization-on-externally-downloaded-pngs iPhone optimization on externally downloaded PNGs When a PNG is added to an XCode iPhone project the compiler optimizes.. the non native format and the fact that the alpha must be computed separately for each color. So you have two options Perform the same work that pngcrush does and swap ordering pre multiply alpha. The speed up may be due to one or both of these...
Perform copy/cut from UIResponderStandardEditActions http://stackoverflow.com/questions/8031175/perform-copy-cut-from-uiresponderstandardeditactions copy cut from UIResponderStandardEditActions These are standart actions for UIMenuController declared http developer.apple.com..
How do I draw a shadow under a UIView? http://stackoverflow.com/questions/805872/how-do-i-draw-a-shadow-under-a-uiview guide is a little vague Save the graphics state. Call the function CGContextSetShadow passing the appropriate values. Perform all the drawing to which you want to apply shadows. Restore the graphics state I've tried the following in a UIView subclass..
iOS 5 Attach photo to Twitter with Twitter API http://stackoverflow.com/questions/8129079/ios-5-attach-photo-to-twitter-with-twitter-api @ media type @ multipart form data Set the account used to post the tweet. postRequest setAccount twitterAccount Perform the request created above and create a handler block to handle the response. postRequest performRequestWithHandler ^ NSData..
Loop through all object properties at runtime http://stackoverflow.com/questions/9269372/loop-through-all-object-properties-at-runtime how can I do something like this @implementation SomeBaseClass NSString checkAllProperties for property in properties Perform a check on the property EDIT This would be particularly useful in a custom NSString description override. iphone objective..
Adding json data into UITableView http://stackoverflow.com/questions/9875641/adding-json-data-into-uitableview NSURLRequest request NSURLRequest requestWithURL NSURL URLWithString @ http twitter.com statuses public_timeline.json Perform request and get JSON back as a NSData object NSData response NSURLConnection sendSynchronousRequest request returningResponse..
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