2014/10/15 下午 10:11:20
iphone Programming Glossary: meansiPhone viewWillAppear not firing http://stackoverflow.com/questions/131062/iphone-viewwillappear-not-firing when you do not create your view hierarchy just right. My problem is I can't figure out what that means. If I create a RootViewController and call addSubView on that controller I would expect the added view..
Use CoreData or SQLite on iPhone? [closed] http://stackoverflow.com/questions/1318467/use-coredata-or-sqlite-on-iphone
Is there a documented way to set the iPhone orientation? http://stackoverflow.com/questions/181780/is-there-a-documented-way-to-set-the-iphone-orientation to honor the requested orientation of the view being pushed back onto the stack. That likely means that you would need to detect older iPhone OS versions and only apply the setOrientation when it is..
How do I associate file types with an iPhone application? http://stackoverflow.com/questions/2774343/how-do-i-associate-file-types-with-an-iphone-application to set up your app to launch other appropriate apps when it encounters an unknown file type. This means the association doesn't work out of the box for any app like the URL protocol registering did. This..
EXC_BAD_ACCESS signal received http://stackoverflow.com/questions/327082/exc-bad-access-signal-received factory methods e.g. NSString stringWithFormat then you'll have an autorelease reference which means it could be released at some time in the future by other code so it is vital that if you need to keep..
Using the apple FFT and accelerate Framework http://stackoverflow.com/questions/3398753/using-the-apple-fft-and-accelerate-framework on n real floats and then reverse to get back to where we started. ip stands for in place which means A gets overwritten That's the reason for all this special packing malarkey so that we can squash the.. bin. Ok Now onto the code Note the 'ip' in vDSP_fft_zrip ' in place ' ie output overwrites A 'r' means it takes real inputs Look at the documentation on vDSP_fft_zrip Real data is stored in split complex..
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 http www.drobnik.com touch 2010 04 universal static libraries There's some bugs in his script that means it only works on his machine he should be using BUILT_PRODUCTS_DIR and or BUILD_DIR instead of guesstimating..
Bold & Non-Bold Text In A Single UILabel? http://stackoverflow.com/questions/3586871/bold-non-bold-text-in-a-single-uilabel now UILabel UIButton UITextView UITextField and maybe others now support attributed strings which means we don't need to create CATextLayer s as our recipient for attributed strings. Furthermore to make the..
http://stackoverflow.com/questions/402/iphone-app-in-landscape-mode where it says and you need to use shouldAutorotateToInterfaceOrientation properly everywhere it means everywhere all your fullscreen views. Hope it helps in this nightmare An important reminder of the ADDITIONAL..
Difference between self.ivar and ivar? http://stackoverflow.com/questions/4142177/difference-between-self-ivar-and-ivar the retained string. Just calling name foo does nothing more than assigning name to foo. This also means that you can only call self.xxx when you have defined a property for the ivar otherwise the compiler..
Set the maximum character length of a UITextField http://stackoverflow.com/questions/433337/set-the-maximum-character-length-of-a-uitextfield be 0 because we're not replacing deleting anything. Inserting into the middle of a text field just means a different range.location and pasting multiple characters just means string has more than one character.. middle of a text field just means a different range.location and pasting multiple characters just means string has more than one character in it. Deleting single characters or cutting multiple characters..
How to filter NSFetchedResultsController (CoreData) with UISearchDisplayController/UISearchBar http://stackoverflow.com/questions/4471289/how-to-filter-nsfetchedresultscontroller-coredata-with-uisearchdisplaycontroll Edit the section name key path and cache name if appropriate. nil for section name key path means no sections . NSFetchedResultsController aFetchedResultsController NSFetchedResultsController alloc..
iPhone - Backgrounding to poll for events http://stackoverflow.com/questions/4656214/iphone-backgrounding-to-poll-for-events being executed for a short while. You can see this if you place 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.. have some time 5 seconds left to finish tasks. I discovered that this must be CPU time. So that means if you do nothing your app is still being executed Apple suggest to call an expirationhandler if you..
What's the best way to communicate between view controllers? http://stackoverflow.com/questions/569940/whats-the-best-way-to-communicate-between-view-controllers you think about them in the context of the dependency injection design pattern. In a nutshell this means that your controller shouldn't look up the objects it needs to do its job e.g. reference a global variable.. check out Well that's not really its job. It should DELEGATE that work to some other object which means that it DEPENDS on another object. So we might modify our BookPickerViewController init method as follows..
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 though you don't want to use it. From the compiler's perspective it is an object after all. That means that if the method you're calling someMethod is returning a non object including void you could end..
iPhone - strange error when testing on simulator http://stackoverflow.com/questions/788277/iphone-strange-error-when-testing-on-simulator register com.myApp.debug with the bootstrap server. Error unknown error code. This generally means that another instance of this process was already running or is hung in the debugger.Program received..
iPhone viewWillAppear not firing http://stackoverflow.com/questions/131062/iphone-viewwillappear-not-firing posts about people having problems with viewWillAppear when you do not create your view hierarchy just right. My problem is I can't figure out what that means. If I create a RootViewController and call addSubView on that controller I would expect the added view s to be wired up for viewWillAppear events. Does anyone have..
Use CoreData or SQLite on iPhone? [closed] http://stackoverflow.com/questions/1318467/use-coredata-or-sqlite-on-iphone
Is there a documented way to set the iPhone orientation? http://stackoverflow.com/questions/181780/is-there-a-documented-way-to-set-the-iphone-orientation no longer an issue on the later iPhone 3.1.2 SDK. It now appears to honor the requested orientation of the view being pushed back onto the stack. That likely means that you would need to detect older iPhone OS versions and only apply the setOrientation when it is prior to the latest release. It is not clear if Apple's static..
How do I associate file types with an iPhone application? http://stackoverflow.com/questions/2774343/how-do-i-associate-file-types-with-an-iphone-application types. There is a lot of talk in the documentation about how to set up your app to launch other appropriate apps when it encounters an unknown file type. This means the association doesn't work out of the box for any app like the URL protocol registering did. This leads me to the question have system apps like Safari or Mail..
EXC_BAD_ACCESS signal received http://stackoverflow.com/questions/327082/exc-bad-access-signal-received you get something back from just about anything else including factory methods e.g. NSString stringWithFormat then you'll have an autorelease reference which means it could be released at some time in the future by other code so it is vital that if you need to keep it around beyond the immediate function that you retain it...
Using the apple FFT and accelerate Framework http://stackoverflow.com/questions/3398753/using-the-apple-fft-and-accelerate-framework vDSP_fft_zrip setupReal A stride log2n FFT_INVERSE FFT on n real floats and then reverse to get back to where we started. ip stands for in place which means A gets overwritten That's the reason for all this special packing malarkey so that we can squash the return value into the same space as the send value. To give.. between frames to get the precise frequency for a given bin. Ok Now onto the code Note the 'ip' in vDSP_fft_zrip ' in place ' ie output overwrites A 'r' means it takes real inputs Look at the documentation on vDSP_fft_zrip Real data is stored in split complex form with odd reals stored on the imaginary side of the split..
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 a great idea it's an excellent approach but it doesn't work http www.drobnik.com touch 2010 04 universal static libraries There's some bugs in his script that means it only works on his machine he should be using BUILT_PRODUCTS_DIR and or BUILD_DIR instead of guesstimating them Apple's latest Xcode prevents you from doing what..
Bold & Non-Bold Text In A Single UILabel? http://stackoverflow.com/questions/3586871/bold-non-bold-text-in-a-single-uilabel share improve this question Update for iOS6 In iOS6 now UILabel UIButton UITextView UITextField and maybe others now support attributed strings which means we don't need to create CATextLayer s as our recipient for attributed strings. Furthermore to make the attributed string we don't need to play with CoreText anymore..
http://stackoverflow.com/questions/402/iphone-app-in-landscape-mode .. interface builder landscape design Note in particular that where it says and you need to use shouldAutorotateToInterfaceOrientation properly everywhere it means everywhere all your fullscreen views. Hope it helps in this nightmare An important reminder of the ADDITIONAL well known problem at hand here if you are trying..
Difference between self.ivar and ivar? http://stackoverflow.com/questions/4142177/difference-between-self-ivar-and-ivar string then retains the new string and finally sets name to the retained string. Just calling name foo does nothing more than assigning name to foo. This also means that you can only call self.xxx when you have defined a property for the ivar otherwise the compiler will tell you that it don't know about it. share improve this..
Set the maximum character length of a UITextField http://stackoverflow.com/questions/433337/set-the-maximum-character-length-of-a-uitextfield will be the current field's length and range.length will be 0 because we're not replacing deleting anything. Inserting into the middle of a text field just means a different range.location and pasting multiple characters just means string has more than one character in it. Deleting single characters or cutting multiple characters.. we're not replacing deleting anything. Inserting into the middle of a text field just means a different range.location and pasting multiple characters just means string has more than one character in it. Deleting single characters or cutting multiple characters is specified by a range with a non zero length and an empty..
How to filter NSFetchedResultsController (CoreData) with UISearchDisplayController/UISearchBar http://stackoverflow.com/questions/4471289/how-to-filter-nsfetchedresultscontroller-coredata-with-uisearchdisplaycontroll 20 fetchRequest setSortDescriptors sortDescriptors Edit the section name key path and cache name if appropriate. nil for section name key path means no sections . NSFetchedResultsController aFetchedResultsController NSFetchedResultsController alloc initWithFetchRequest fetchRequest managedObjectContext..
iPhone - Backgrounding to poll for events http://stackoverflow.com/questions/4656214/iphone-backgrounding-to-poll-for-events I discovered that my timers and previous running treads are being executed for a short while. You can see this if you place 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.. some Task has to be finished code. According to Apple you have some time 5 seconds left to finish tasks. I discovered that this must be CPU time. So that means if you do nothing your app is still being executed Apple suggest to call an expirationhandler if you are finished with your work. In the code below you can see..
What's the best way to communicate between view controllers? http://stackoverflow.com/questions/569940/whats-the-best-way-to-communicate-between-view-controllers the Stanford presentation are much easier to understand if you think about them in the context of the dependency injection design pattern. In a nutshell this means that your controller shouldn't look up the objects it needs to do its job e.g. reference a global variable . Instead you should always inject those dependencies.. do once the user has picked his her books and is ready to check out Well that's not really its job. It should DELEGATE that work to some other object which means that it DEPENDS on another object. So we might modify our BookPickerViewController init method as follows @implementation BookPickerViewController void initWithWarehouse..
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 the object value that's returned from methodForSelector even though you don't want to use it. From the compiler's perspective it is an object after all. That means that if the method you're calling someMethod is returning a non object including void you could end up with a garbage pointer value being retained released and..
iPhone - strange error when testing on simulator http://stackoverflow.com/questions/788277/iphone-strange-error-when-testing-on-simulator 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 means that another instance of this process was already running or is hung in the debugger.Program received signal �SIGABRT I tried removing the app from the simulator..
iPhone viewWillAppear not firing http://stackoverflow.com/questions/131062/iphone-viewwillappear-not-firing with viewWillAppear when you do not create your view hierarchy just right. My problem is I can't figure out what that means. If I create a RootViewController and call addSubView on that controller I would expect the added view s to be wired up..
Use CoreData or SQLite on iPhone? [closed] http://stackoverflow.com/questions/1318467/use-coredata-or-sqlite-on-iphone
Is there a documented way to set the iPhone orientation? http://stackoverflow.com/questions/181780/is-there-a-documented-way-to-set-the-iphone-orientation 3.1.2 SDK. It now appears to honor the requested orientation of the view being pushed back onto the stack. That likely means that you would need to detect older iPhone OS versions and only apply the setOrientation when it is prior to the latest..
How do I associate file types with an iPhone application? http://stackoverflow.com/questions/2774343/how-do-i-associate-file-types-with-an-iphone-application about how to set up your app to launch other appropriate apps when it encounters an unknown file type. This means the association doesn't work out of the box for any app like the URL protocol registering did. This leads me to the question..
EXC_BAD_ACCESS signal received http://stackoverflow.com/questions/327082/exc-bad-access-signal-received anything else including factory methods e.g. NSString stringWithFormat then you'll have an autorelease reference which means it could be released at some time in the future by other code so it is vital that if you need to keep it around beyond the..
Using the apple FFT and accelerate Framework http://stackoverflow.com/questions/3398753/using-the-apple-fft-and-accelerate-framework log2n FFT_INVERSE FFT on n real floats and then reverse to get back to where we started. ip stands for in place which means A gets overwritten That's the reason for all this special packing malarkey so that we can squash the return value into the.. frequency for a given bin. Ok Now onto the code Note the 'ip' in vDSP_fft_zrip ' in place ' ie output overwrites A 'r' means it takes real inputs Look at the documentation on vDSP_fft_zrip Real data is stored in split complex form with odd reals..
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 but it doesn't work http www.drobnik.com touch 2010 04 universal static libraries There's some bugs in his script that means it only works on his machine he should be using BUILT_PRODUCTS_DIR and or BUILD_DIR instead of guesstimating them Apple's..
Bold & Non-Bold Text In A Single UILabel? http://stackoverflow.com/questions/3586871/bold-non-bold-text-in-a-single-uilabel for iOS6 In iOS6 now UILabel UIButton UITextView UITextField and maybe others now support attributed strings which means we don't need to create CATextLayer s as our recipient for attributed strings. Furthermore to make the attributed string..
http://stackoverflow.com/questions/402/iphone-app-in-landscape-mode in particular that where it says and you need to use shouldAutorotateToInterfaceOrientation properly everywhere it means everywhere all your fullscreen views. Hope it helps in this nightmare An important reminder of the ADDITIONAL well known..
Difference between self.ivar and ivar? http://stackoverflow.com/questions/4142177/difference-between-self-ivar-and-ivar sets name to the retained string. Just calling name foo does nothing more than assigning name to foo. This also means that you can only call self.xxx when you have defined a property for the ivar otherwise the compiler will tell you that..
Set the maximum character length of a UITextField http://stackoverflow.com/questions/433337/set-the-maximum-character-length-of-a-uitextfield range.length will be 0 because we're not replacing deleting anything. Inserting into the middle of a text field just means a different range.location and pasting multiple characters just means string has more than one character in it. Deleting.. Inserting into the middle of a text field just means a different range.location and pasting multiple characters just means string has more than one character in it. Deleting single characters or cutting multiple characters is specified by a range..
How to filter NSFetchedResultsController (CoreData) with UISearchDisplayController/UISearchBar http://stackoverflow.com/questions/4471289/how-to-filter-nsfetchedresultscontroller-coredata-with-uisearchdisplaycontroll sortDescriptors Edit the section name key path and cache name if appropriate. nil for section name key path means no sections . NSFetchedResultsController aFetchedResultsController NSFetchedResultsController alloc initWithFetchRequest..
iPhone - Backgrounding to poll for events http://stackoverflow.com/questions/4656214/iphone-backgrounding-to-poll-for-events running treads are being executed for a short while. You can see this if you place 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.. According to Apple you have some time 5 seconds left to finish tasks. I discovered that this must be CPU time. So that means if you do nothing your app is still being executed Apple suggest to call an expirationhandler if you are finished with your..
What's the best way to communicate between view controllers? http://stackoverflow.com/questions/569940/whats-the-best-way-to-communicate-between-view-controllers to understand if you think about them in the context of the dependency injection design pattern. In a nutshell this means that your controller shouldn't look up the objects it needs to do its job e.g. reference a global variable . Instead you.. and is ready to check out Well that's not really its job. It should DELEGATE that work to some other object which means that it DEPENDS on another object. So we might modify our BookPickerViewController init method as follows @implementation..
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 even though you don't want to use it. From the compiler's perspective it is an object after all. That means that if the method you're calling someMethod is returning a non object including void you could end up with a garbage pointer..
iPhone - strange error when testing on simulator http://stackoverflow.com/questions/788277/iphone-strange-error-when-testing-on-simulator in the console Couldn't register com.myApp.debug with the bootstrap server. Error unknown error code. This generally means that another instance of this process was already running or is hung in the debugger.Program received signal �SIGABRT I tried..
Rotate Portrait to Landscape in pdfreader in ios6 and ios7 http://stackoverflow.com/questions/19651657/rotate-portrait-to-landscape-in-pdfreader-in-ios6-and-ios7 But at that time i rotate the view more then two times or in 360 degree then i go to back. Its not working properly. Means after landscapeviewcontroller it must transfer portraitView but it can't do this. I give my project. Please Help me. I search..
UIButton inside a view that has a UITapGestureRecognizer http://stackoverflow.com/questions/3344341/uibutton-inside-a-view-that-has-a-uitapgesturerecognizer just remove the UITapGestureRecognizer after I received it's tap. Because with it the new view can also be removed. Means I want a behavior like the fullscreen vide controls . iphone objective c cocoa touch share improve this question You..
NSRegularExpression to validate URL http://stackoverflow.com/questions/4738521/nsregularexpression-to-validate-url spaces 1 or more times ^ s non white spaces 0 or more times optionally @ @ optional Private IP Addresses Means DO NOT MATCH ahead. So do not match any of the following 10 10 10.0.0.0 10.999.999.999 . d 1 3 . 1 to 3 digits three..
Random EXC_BAD_ACCESS in a place that it cannot happen http://stackoverflow.com/questions/6359111/random-exc-bad-access-in-a-place-that-it-cannot-happen not the one from NSObject In GDB gdb print object LevelEditorScene sharedLevelEditor LevelEditorScene 06C3FF40 Tag 1 Means LevelEditorScene sharedLevelEditor is ok. gdb print bool LevelEditorScene sharedLevelEditor respondsToSelector @selector.. is ok. gdb print bool LevelEditorScene sharedLevelEditor respondsToSelector @selector setObject forKey 9 true Means it responds to the selector gdb print object object 15 gdb print object key Maze Width Means the arguments are ok it shouldn't.. setObject forKey 9 true Means it responds to the selector gdb print object object 15 gdb print object key Maze Width Means the arguments are ok it shouldn't matter anyway . What else can be causing the exception iphone objective c exc bad access..
Facebook iOS SDK - Strange Effects in Writing to Status http://stackoverflow.com/questions/7932087/facebook-ios-sdk-strange-effects-in-writing-to-status the code to call the feed dialog. Check out https developers.facebook.com docs reference dialogs feed . What Logout Means Logging out just logs the user out of your App not out of facebook. iphone ios facebook login share improve this question..
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