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2014/10/15 ¤U¤È 10:03:31
iphone Programming Glossary: againLazy load images in UITableView http://stackoverflow.com/questions/1130089/lazy-load-images-in-uitableview the images in separate threads but I have to load each image every time a cell becomes visible again Otherwise reuse of cells shows old images . Can someone please tell me how to duplicate this behavior...
“wait_fences: failed to receive reply: 10004003”? http://stackoverflow.com/questions/1371346/wait-fences-failed-to-receive-reply-10004003 that is instead of printing the error only the first time the keyboard is shown and never again the error is not printed the first time but every time after. This is causing a major headache for me...
How to store custom objects in NSUserDefaults http://stackoverflow.com/questions/2315948/how-to-store-custom-objects-in-nsuserdefaults where it crashes so I'm doing something wrong but I'm not sure what. Help would be appreciated again thank you I haven't gotten around to decrypting yet as I haven't gotten encrypting working yet. iphone..
JSON and Core Data on the iPhone http://stackoverflow.com/questions/2362323/json-and-core-data-on-the-iphone the relationship between the entities and 2 convert the JSON string back into core data objects again preserving the relationship between entities . I have searched unsuccessfully for a tutorial code sample..
Objective-C categories in static library http://stackoverflow.com/questions/2567498/objective-c-categories-in-static-library this question Solution As of Xcode 4.2 you only need to go to the application that is linking against the library not the library itself and click the project in the Project Navigator click your app's.. was my fault direct dependency projecct possibly was not added properly. When I remove it and add again with steps Drag drop lib project file in app project or add it with Project Add to project . Click on..
EXC_BAD_ACCESS signal received http://stackoverflow.com/questions/327082/exc-bad-access-signal-received debug and run as long as I step through the instructions one at a time. As soon as I let it run again I will hit the EXC_BAD_ACCESS signal. In this particular case it happened to be an error in the accelerometer..
Fast and Lean PDF Viewer for iPhone / iPad / iOs - tips and hints? http://stackoverflow.com/questions/3889634/fast-and-lean-pdf-viewer-for-iphone-ipad-ios-tips-and-hints so that the PDF image is ready to mask the layer before it starts drawing.Pages are destroyed again when they are 2 pages away from the focused page. Does anyone have any insights no matter how small..
Converting NSString to NSDate (and back again) http://stackoverflow.com/questions/3917250/converting-nsstring-to-nsdate-and-back-again NSString to NSDate and back again How would I convert an NSString like 01 02 10 meaning 1st February 2010 into an NSDate And how could..
How do you beta test an iphone app? http://stackoverflow.com/questions/40154/how-do-you-beta-test-an-iphone-app by selecting its private key and the File Export Items... . Go back to the Provisioning Portal again. Go to the section Provisioning . Go to the tab Distribution . Click the button New Profile . Select.. the checkbox get task allow . Bring up the Target Info pane and find the section Code Signing again. After Code Signing Entitlements enter the file name Entitlements.plist . Save clean and build the project...
iPhone - Backgrounding to poll for events http://stackoverflow.com/questions/4656214/iphone-backgrounding-to-poll-for-events If you use one of the backgrounding features the app will be launched by iOS in background again once it was quit by the system . This we will abuse later. In my case I used VoIP backgrounding enabled.. restart a long running task. This task will be terminated after 600 seconds. But there will be again a call to the expiration handler which starts another long running task etc. Now you only have to check.. over. By defining the block into a block variable one can recursively start the long running task again within the expiration handler. This leads into endless execution too. Be aware to terminate the task..
Lock-down iPhone/iPod/iPad so it can only run one app http://stackoverflow.com/questions/5011774/lock-down-iphone-ipod-ipad-so-it-can-only-run-one-app following Reboot Open the settings app FIRST don't open anything else or you will need to reboot again Settings General Profiles your profile remove it. Reboot you should be back to normal. I have included.. when the device is rebooted will be the only app that will run until you reboot the device again. As @Cawas has said this completely disables the ability to return to the home screen unless your app..
How do I create delegates in Objective-C? http://stackoverflow.com/questions/626898/how-do-i-create-delegates-in-objective-c
How do I get a background location update every n minutes in my iOS application? http://stackoverflow.com/questions/6347503/how-do-i-get-a-background-location-update-every-n-minutes-in-my-ios-application it does works just fine in case n is larger the location manager should be enabled and disabled again before there is no time remaining to avoid the background task being killed. This does work since location..
Understanding reference counting with Cocoa and Objective-C http://stackoverflow.com/questions/6578/understanding-reference-counting-with-cocoa-and-objective-c release for us so we don't have to and in fact we shouldn't . What's important to note is that again by convention all object creation class methods return an autoreleased object. For example in the following..
iPhone - strange error when testing on simulator http://stackoverflow.com/questions/788277/iphone-strange-error-when-testing-on-simulator button of a UIAlertView. I stopped debugging there made some changes to the code and built the app again. Now when I run the application I get this error in the console Couldn't register com.myApp.debug with.. this error when I try to run the app. What should I do to be able to run the app on my simulator again iphone unit testing ios simulator share improve this question Try quitting and restarting the simulator..
Lazy load images in UITableView http://stackoverflow.com/questions/1130089/lazy-load-images-in-uitableview freeze up while the images are being loaded. I tried getting the images in separate threads but I have to load each image every time a cell becomes visible again Otherwise reuse of cells shows old images . Can someone please tell me how to duplicate this behavior. iphone ios objective c uitableview uitableviewcontroller..
“wait_fences: failed to receive reply: 10004003”? http://stackoverflow.com/questions/1371346/wait-fences-failed-to-receive-reply-10004003 happens if I put the line in viewDidAppear instead of viewWillAppear that is instead of printing the error only the first time the keyboard is shown and never again the error is not printed the first time but every time after. This is causing a major headache for me. iphone objective c cocoa touch share improve this question..
How to store custom objects in NSUserDefaults http://stackoverflow.com/questions/2315948/how-to-store-custom-objects-in-nsuserdefaults I've narrowed it down to the encryption part of the app that's where it crashes so I'm doing something wrong but I'm not sure what. Help would be appreciated again thank you I haven't gotten around to decrypting yet as I haven't gotten encrypting working yet. iphone objective c encoding nsuserdefaults share improve this..
JSON and Core Data on the iPhone http://stackoverflow.com/questions/2362323/json-and-core-data-on-the-iphone the core data records into a JSON string whilst maintaining the relationship between the entities and 2 convert the JSON string back into core data objects again preserving the relationship between entities . I have searched unsuccessfully for a tutorial code sample on this point so any assistance would be gratefully received...
Objective-C categories in static library http://stackoverflow.com/questions/2567498/objective-c-categories-in-static-library iphone objective c static libraries categories share improve this question Solution As of Xcode 4.2 you only need to go to the application that is linking against the library not the library itself and click the project in the Project Navigator click your app's target then build settings then search for Other Linker Flags.. added as direct dependency. But later I found that it was my fault direct dependency projecct possibly was not added properly. When I remove it and add again with steps Drag drop lib project file in app project or add it with Project Add to project . Click on arrow at lib project icon mylib.a file name shown drag this..
EXC_BAD_ACCESS signal received http://stackoverflow.com/questions/327082/exc-bad-access-signal-received runs without any issue on the iPhone simulator it will also debug and run as long as I step through the instructions one at a time. As soon as I let it run again I will hit the EXC_BAD_ACCESS signal. In this particular case it happened to be an error in the accelerometer code. It would not execute within the simulator which..
Fast and Lean PDF Viewer for iPhone / iPad / iOs - tips and hints? http://stackoverflow.com/questions/3889634/fast-and-lean-pdf-viewer-for-iphone-ipad-ios-tips-and-hints appears. Im rendering 2 pages each side of the page in focus so that the PDF image is ready to mask the layer before it starts drawing.Pages are destroyed again when they are 2 pages away from the focused page. Does anyone have any insights no matter how small or obvious to improve the performance memory handling of Drawing..
Converting NSString to NSDate (and back again) http://stackoverflow.com/questions/3917250/converting-nsstring-to-nsdate-and-back-again NSString to NSDate and back again How would I convert an NSString like 01 02 10 meaning 1st February 2010 into an NSDate And how could I turn the NSDate back into a string iphone objective c ios..
How do you beta test an iphone app? http://stackoverflow.com/questions/40154/how-do-you-beta-test-an-iphone-app the file to add it to the Keychain. Backup the certificate by selecting its private key and the File Export Items... . Go back to the Provisioning Portal again. Go to the section Provisioning . Go to the tab Distribution . Click the button New Profile . Select the radio button Ad hoc . Enter a profile name I named mine.. Entitlements . Name it Entitlements.plist . In this file uncheck the checkbox get task allow . Bring up the Target Info pane and find the section Code Signing again. After Code Signing Entitlements enter the file name Entitlements.plist . Save clean and build the project. In Groups Files find the folder MyApp Products and expand..
iPhone - Backgrounding to poll for events http://stackoverflow.com/questions/4656214/iphone-backgrounding-to-poll-for-events I am still uncertain how this may influence the reviewing process. If you use one of the backgrounding features the app will be launched by iOS in background again once it was quit by the system . This we will abuse later. In my case I used VoIP backgrounding enabled in my plist. All the code here is done in your AppDelegate.. out the VoIP expirationHandler will be called where you simply restart a long running task. This task will be terminated after 600 seconds. But there will be again a call to the expiration handler which starts another long running task etc. Now you only have to check weather the App is getting back to foreground. Then close.. block will be executed if execution time is over. By defining the block into a block variable one can recursively start the long running task again within the expiration handler. This leads into endless execution too. Be aware to terminate the task if your application enters foreground again. And terminate..
Lock-down iPhone/iPod/iPad so it can only run one app http://stackoverflow.com/questions/5011774/lock-down-iphone-ipod-ipad-so-it-can-only-run-one-app to get your device back to normal you would need to do the following Reboot Open the settings app FIRST don't open anything else or you will need to reboot again Settings General Profiles your profile remove it. Reboot you should be back to normal. I have included an example plist that will disable the home button and lock.. Once this profile is installed the first app that is launched when the device is rebooted will be the only app that will run until you reboot the device again. As @Cawas has said this completely disables the ability to return to the home screen unless your app crashes including accessibility assistive touch. Note that..
How do I create delegates in Objective-C? http://stackoverflow.com/questions/626898/how-do-i-create-delegates-in-objective-c
How do I get a background location update every n minutes in my iOS application? http://stackoverflow.com/questions/6347503/how-do-i-get-a-background-location-update-every-n-minutes-in-my-ios-application case n is smaller than UIApplication backgroundTimeRemaining it does works just fine in case n is larger the location manager should be enabled and disabled again before there is no time remaining to avoid the background task being killed. This does work since location is one of the three allowed types of background execution..
Understanding reference counting with Cocoa and Objective-C http://stackoverflow.com/questions/6578/understanding-reference-counting-with-cocoa-and-objective-c From our perspective as programmers it takes care of calling release for us so we don't have to and in fact we shouldn't . What's important to note is that again by convention all object creation class methods return an autoreleased object. For example in the following example the variable s has a reference count of 1 but..
iPhone - strange error when testing on simulator http://stackoverflow.com/questions/788277/iphone-strange-error-when-testing-on-simulator my app on the simulator when it crashed on clicking a button of a UIAlertView. I stopped debugging there made some changes to the code and built the app again. Now when I run the application I get this error in the console Couldn't register com.myApp.debug with the bootstrap server. Error unknown error code. This generally.. app from the simulator doing a clean build but I still get this error when I try to run the app. What should I do to be able to run the app on my simulator again iphone unit testing ios simulator share improve this question Try quitting and restarting the simulator If worse comes to worst you can always try restarting..
Lazy load images in UITableView http://stackoverflow.com/questions/1130089/lazy-load-images-in-uitableview loaded. I tried getting the images in separate threads but I have to load each image every time a cell becomes visible again Otherwise reuse of cells shows old images . Can someone please tell me how to duplicate this behavior. iphone ios objective..
“wait_fences: failed to receive reply: 10004003”? http://stackoverflow.com/questions/1371346/wait-fences-failed-to-receive-reply-10004003 instead of viewWillAppear that is instead of printing the error only the first time the keyboard is shown and never again the error is not printed the first time but every time after. This is causing a major headache for me. iphone objective..
How to store custom objects in NSUserDefaults http://stackoverflow.com/questions/2315948/how-to-store-custom-objects-in-nsuserdefaults part of the app that's where it crashes so I'm doing something wrong but I'm not sure what. Help would be appreciated again thank you I haven't gotten around to decrypting yet as I haven't gotten encrypting working yet. iphone objective c encoding..
JSON and Core Data on the iPhone http://stackoverflow.com/questions/2362323/json-and-core-data-on-the-iphone whilst maintaining the relationship between the entities and 2 convert the JSON string back into core data objects again preserving the relationship between entities . I have searched unsuccessfully for a tutorial code sample on this point so..
Objective-C categories in static library http://stackoverflow.com/questions/2567498/objective-c-categories-in-static-library share improve this question Solution As of Xcode 4.2 you only need to go to the application that is linking against the library not the library itself and click the project in the Project Navigator click your app's target then build settings.. I found that it was my fault direct dependency projecct possibly was not added properly. When I remove it and add again with steps Drag drop lib project file in app project or add it with Project Add to project . Click on arrow at lib project..
EXC_BAD_ACCESS signal received http://stackoverflow.com/questions/327082/exc-bad-access-signal-received simulator it will also debug and run as long as I step through the instructions one at a time. As soon as I let it run again I will hit the EXC_BAD_ACCESS signal. In this particular case it happened to be an error in the accelerometer code. It would..
Fast and Lean PDF Viewer for iPhone / iPad / iOs - tips and hints? http://stackoverflow.com/questions/3889634/fast-and-lean-pdf-viewer-for-iphone-ipad-ios-tips-and-hints of the page in focus so that the PDF image is ready to mask the layer before it starts drawing.Pages are destroyed again when they are 2 pages away from the focused page. Does anyone have any insights no matter how small or obvious to improve..
Converting NSString to NSDate (and back again) http://stackoverflow.com/questions/3917250/converting-nsstring-to-nsdate-and-back-again NSString to NSDate and back again How would I convert an NSString like 01 02 10 meaning 1st February 2010 into an NSDate And how could I turn the NSDate..
How do you beta test an iphone app? http://stackoverflow.com/questions/40154/how-do-you-beta-test-an-iphone-app Backup the certificate by selecting its private key and the File Export Items... . Go back to the Provisioning Portal again. Go to the section Provisioning . Go to the tab Distribution . Click the button New Profile . Select the radio button Ad.. . In this file uncheck the checkbox get task allow . Bring up the Target Info pane and find the section Code Signing again. After Code Signing Entitlements enter the file name Entitlements.plist . Save clean and build the project. In Groups Files..
iPhone - Backgrounding to poll for events http://stackoverflow.com/questions/4656214/iphone-backgrounding-to-poll-for-events the reviewing process. If you use one of the backgrounding features the app will be launched by iOS in background again once it was quit by the system . This we will abuse later. In my case I used VoIP backgrounding enabled in my plist. All.. called where you simply restart a long running task. This task will be terminated after 600 seconds. But there will be again a call to the expiration handler which starts another long running task etc. Now you only have to check weather the App.. if execution time is over. By defining the block into a block variable one can recursively start the long running task again within the expiration handler. This leads into endless execution too. Be aware to terminate the task if your application..
Lock-down iPhone/iPod/iPad so it can only run one app http://stackoverflow.com/questions/5011774/lock-down-iphone-ipod-ipad-so-it-can-only-run-one-app would need to do the following Reboot Open the settings app FIRST don't open anything else or you will need to reboot again Settings General Profiles your profile remove it. Reboot you should be back to normal. I have included an example plist.. first app that is launched when the device is rebooted will be the only app that will run until you reboot the device again. As @Cawas has said this completely disables the ability to return to the home screen unless your app crashes including..
How do I create delegates in Objective-C? http://stackoverflow.com/questions/626898/how-do-i-create-delegates-in-objective-c
How do I get a background location update every n minutes in my iOS application? http://stackoverflow.com/questions/6347503/how-do-i-get-a-background-location-update-every-n-minutes-in-my-ios-application it does works just fine in case n is larger the location manager should be enabled and disabled again before there is no time remaining to avoid the background task being killed. This does work since location is one of the..
Understanding reference counting with Cocoa and Objective-C http://stackoverflow.com/questions/6578/understanding-reference-counting-with-cocoa-and-objective-c takes care of calling release for us so we don't have to and in fact we shouldn't . What's important to note is that again by convention all object creation class methods return an autoreleased object. For example in the following example the..
iPhone - strange error when testing on simulator http://stackoverflow.com/questions/788277/iphone-strange-error-when-testing-on-simulator on clicking a button of a UIAlertView. I stopped debugging there made some changes to the code and built the app again. Now when I run the application I get this error in the console Couldn't register com.myApp.debug with the bootstrap server... build but I still get this error when I try to run the app. What should I do to be able to run the app on my simulator again iphone unit testing ios simulator share improve this question Try quitting and restarting the simulator If worse comes..
how to remove subviews from scrollview? http://stackoverflow.com/questions/1310723/how-to-remove-subviews-from-scrollview to only remove all the UIButtons or custom subclasses of UIButton that exist in a view you could use something like Again valid UIView view for UIView subview in view subviews if subview isKindOfClass UIButton class subview removeFromSuperview..
iPhone App floating point calculations when released to the app store. http://stackoverflow.com/questions/14210621/iphone-app-floating-point-calculations-when-released-to-the-app-store below dischargeAH returns 8 if set the domesticAH to 1000 it returns 83 the float is rounded when it is displayed . Again I stress the below works fine when running on the simulator or put directly onto my iPhone 4s only once released through..
Why does instantiating a UIFont in an iphone unit test cause a crash? http://stackoverflow.com/questions/1689586/why-does-instantiating-a-uifont-in-an-iphone-unit-test-cause-a-crash Make sure your test target's Bundle Loader is set to BUILT_PRODUCTS_DIR Your Product Name.app Your Product Name Again . Take note it's ... Product.app Product that is there is no .app in the final segment of the path. If you're curious to..
iphone uiwebview download complete page with CSS and Images http://stackoverflow.com/questions/1720524/iphone-uiwebview-download-complete-page-with-css-and-images html file will monkey things up img src http google.com f r i g img.gif while this would be ok img src f r i g img.gif Again this whole solution is mucky. You might look into a pre existing open source recursive html spider. I think wget does what..
MFMailComposeViewController image orientation http://stackoverflow.com/questions/20204495/mfmailcomposeviewcontroller-image-orientation UIImageOrientationUp tells displaying software that the image is fine to display as it is no rotation is necessary. Again the underlying storage of the UIIMage is 3264w x 2448h. Once you are clear about the difference between how the data is..
UITableView Core Data reordering http://stackoverflow.com/questions/2360938/uitableview-core-data-reordering removeObjectAtIndex sourceIndexPath.row myTableViewData insertObject row atIndex destinationIndexPath.row Again the reason I don't update the displayOrder value here is because the user is still in edit mode... we don't know if the..
SQLite3 database doesn't actually insert data - iPhone http://stackoverflow.com/questions/2785211/sqlite3-database-doesnt-actually-insert-data-iphone statement else NSAssert1 0 @ Error while inserting data. ' s' sqlite3_errmsg db Database closeDatabase db Again no errors have been thrown. The prepare and step statements return SQLITE_OK and SQLITE_DONE respectively yet nothing happens...
Practical rules for premature optimization [closed] http://stackoverflow.com/questions/2978460/practical-rules-for-premature-optimization any meaningful answer requires the author to define the term. That's why I don't really think this is a CW question. Again if people disagree I'll change it. iphone algorithm design patterns share improve this question What is premature optimization..
Play local notification default sound when displaying UIAlertView? http://stackoverflow.com/questions/3277811/play-local-notification-default-sound-when-displaying-uialertview outside of the app the device vibrates and the sound specified by UILocalNotificationDefaultSoundName is played. Again I'd like to mimic this in the app when displaying the UIAlertView . I can vibrate the device by calling AudioServicesPlaySystemSound..
http://stackoverflow.com/questions/4194394/client-server-gksessions GK has a highly unusual P2P mode and the documentation focusses on the P2P mode which can be confusing to newcomers. Again P2P is incredibly clever but as a rule you do not want the P2P mode. You want a normal clients with server spoke model which..
iOS SDK - Programmatically generate a PDF file http://stackoverflow.com/questions/4362734/ios-sdk-programmatically-generate-a-pdf-file in a generic way so you don't have to hard code everything. I used this approach and it worked out great for my needs. Again this may or may not make sense for your situation depending on the formatting layout needs of your PDF. EDIT response to..
iPhone Development - Setting UIWebView font http://stackoverflow.com/questions/449773/iphone-development-setting-uiwebview-font myRichTextView setScalesPageToFit NO myRichTextView loadHTMLString myString baseURL NSURL URLWithString myBaseURL Again need to control the display font. If i can't control the font please let me know other alternatives to UIWebView. Thanks..
UIWebView - Enabling Action Sheets on <img> tags http://stackoverflow.com/questions/5163831/uiwebview-enabling-action-sheets-on-img-tags url they are clicking on but we need to change the void openContextualMenuAtPoint method to provide extra options. Again here's mine I tried to copy Safari's behaviour for this void openContextualMenuAt CGPoint pt Load the JavaScript code from..
What are the Dangers of Method Swizzling in Objective C? http://stackoverflow.com/questions/5339276/what-are-the-dangers-of-method-swizzling-in-objective-c of setFrame . This is a bit confusing but this is the correct order. How can we ensure this order of things Again just use load to swizzle things. If you swizzle in load and you only make changes to the class being loaded you'll be safe... is seeing a strange backtrace where the swizzled names are mixed up and everything gets jumbled in your head. Again the alternative implementation addresses this. You'll see clearly named functions in backtraces. Still swizzling can be..
CADisplayLink OpenGL rendering breaks UIScrollView behaviour http://stackoverflow.com/questions/5944050/cadisplaylink-opengl-rendering-breaks-uiscrollview-behaviour it won't overload the queue with pending rendering actions if a frame takes longer than 1 60th of a second to process. Again I tried this on my iPad here and found no disruption to the scrolling action of a table view just a little slowdown as the..
Why am I having to manually set my view's frame in viewDidLoad? http://stackoverflow.com/questions/6757018/why-am-i-having-to-manually-set-my-views-frame-in-viewdidload whatever it was set to in the NIB or in loadView . Something calls for UIKit to display your view controller's view. Again this may be a user action like tapping on a tab or an explicit method call in your code like pushViewController animated..
Objective-C: Asynchronously populate UITableView - how to do this? http://stackoverflow.com/questions/7491517/objective-c-asynchronously-populate-uitableview-how-to-do-this be fed into a data structure not the UI. I recommend Core Data. The data structure should feed your UITableView . Again I recommend Core Data. I would suggest reviewing how MVC works you are short circuiting the design and that is the core..
How to build ICU so I can use it in an iPhone app? http://stackoverflow.com/questions/8126233/how-to-build-icu-so-i-can-use-it-in-an-iphone-app above script source ICU_PATH is an absolute path because libicu configure so requires for the with cross build option. Again check your values for the SDK and compilers but this should be ok for 4.3. Finally you should take into account that Apple..
Crash when using gesture recognizers in StoryBoard http://stackoverflow.com/questions/9035826/crash-when-using-gesture-recognizers-in-storyboard at some point. MORE INFO In the simulator I get __NSCFString setView unrecognized selector sent to instance 0x6d2db70 Again need debugging techniques for example is there a way to find out what object 0x6d2db70 is Which is exactly like this question..
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