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2014/10/15 ¤U¤È 10:09:57
iphone Programming Glossary: handHow to add a breakpoint to objc_exception_throw? http://stackoverflow.com/questions/1163981/how-to-add-a-breakpoint-to-objc-exception-throw menu click on Run Show Breakpoints. A new window pops up. Select global breakpoints in the left hand menu. There should be a box on the right under the Breakpoint column with the text Double Click for..
http://stackoverflow.com/questions/1166444/mkmapview-zoom-and-region region could be described using its min and max coordinates as follows min coordinate lower left hand point latitude 4 longitude 3 max coordinate upper right hand point latitude 4 longitude 3 So you can.. as follows min coordinate lower left hand point latitude 4 longitude 3 max coordinate upper right hand point latitude 4 longitude 3 So you can specify zoom levels around a center point by using an appropriately..
Declaration/definition of variables locations in ObjectiveC? http://stackoverflow.com/questions/12632285/declaration-definition-of-variables-locations-in-objectivec puzzled by the different locations where one could be declaring and defining variables. On one hand we have the traditional C approach on the other we have the new ObjectiveC directives that add OO on..
Use CoreData or SQLite on iPhone? [closed] http://stackoverflow.com/questions/1318467/use-coredata-or-sqlite-on-iphone how much overhead you'd think the framework has in most cases you can beat the performance of hand tuned SQLite using Core Data. On the iPhone it does a great job of batching fetches to minimize memory..
Objective-C - When to use 'self' http://stackoverflow.com/questions/2385980/objective-c-when-to-use-self aController is equivalent to self setMainViewController aController On the other hand mainViewController aController just changes the mainViewController instance variable directly skipping..
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 scroll. In other words if I set the window's scrollTop it will remain at 0. If on the other hand the keyboard is shown scrolling suddenly works. So I can set scrollTop immediately test its value and..
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 they do nothing as before iphone ios cocoa touch ipad share improve this question File type handling is new with iPhone OS 3.2 and is different than the already existing custom URL schemes. You can.. is different than the already existing custom URL schemes. You can register your application to handle particular document types and any application that uses a document controller can hand off processing.. to handle particular document types and any application that uses a document controller can hand off processing of these documents to your own application. For example my application Molecules for..
Difference between [UIImage imageNamed…] and [UIImage imageWithData…]? http://stackoverflow.com/questions/316236/difference-between-uiimage-imagenamed-and-uiimage-imagewithdata representation of that image in memory instead of allocating 10 separate objects. On the other hand if you have a very large image and you're not re using it you might want to load the image from a data..
http://stackoverflow.com/questions/402/iphone-app-in-landscape-mode Hope it helps in this nightmare An important reminder of the ADDITIONAL well known problem at hand here if you are trying to swap between MORE THAN ONE view all landscape IT SIMPLY DOES NOT WORK . It..
OpenGL Texture Coordinates in Pixel Space http://stackoverflow.com/questions/5879403/opengl-texture-coordinates-in-pixel-space es share improve this question This has been asked a few times but I don't have the links at hand so a quick and rough explanation. Let's say the texture is 8 pixels wide 0 1 2 3 4 5 6 7 ^ ^ ^ ^ ^ ^..
Example or explanation of Core Data Migration with multiple passes? http://stackoverflow.com/questions/5995231/example-or-explanation-of-core-data-migration-with-multiple-passes twice the values each as a different type in a separate entitiy. To migrate we choose migration by hand and this we do with mapping models. This is also the first part of the answer to your question. We will..
http://stackoverflow.com/questions/603907/uiimage-resize-then-crop attached image shows what I am trying to achieve. Would someone please be kind enough to hold my hand Every code example I have found so far seems to smash the image be upside down look like crap draw out..
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 two implicit hidden arguments self and _cmd of every Objective C method call . This is handled in the third line the void on the right hand side simply tells the compiler that you know what you're.. _cmd of every Objective C method call . This is handled in the third line the void on the right hand side simply tells the compiler that you know what you're doing and not to generate a warning since the.. ignore the warning but it may be dangerous. I've seen Clang go through a few iterations of how it handles return values that aren't assigned to local variables. There's no reason that with ARC enabled that..
View Controllers: How to switch between views programmatically? http://stackoverflow.com/questions/910994/view-controllers-how-to-switch-between-views-programmatically know I could just use an Tab Bar Controller but I dont want to. I want to see how this is done by hand for learning what's going on under the hood. I have an UIViewController that acts as an root controller..
How to add a breakpoint to objc_exception_throw? http://stackoverflow.com/questions/1163981/how-to-add-a-breakpoint-to-objc-exception-throw can help if you're not finding it clear. In XCode from the top menu click on Run Show Breakpoints. A new window pops up. Select global breakpoints in the left hand menu. There should be a box on the right under the Breakpoint column with the text Double Click for symbol . Single click in this box and type in objc_exception_throw..
http://stackoverflow.com/questions/1166444/mkmapview-zoom-and-region 0 longitude 0 span latitudeDelta 8 longitudeDelta 6 The region could be described using its min and max coordinates as follows min coordinate lower left hand point latitude 4 longitude 3 max coordinate upper right hand point latitude 4 longitude 3 So you can specify zoom levels around a center point by using an appropriately.. region could be described using its min and max coordinates as follows min coordinate lower left hand point latitude 4 longitude 3 max coordinate upper right hand point latitude 4 longitude 3 So you can specify zoom levels around a center point by using an appropriately sized MKCoordinateSpan. As an approximation of Google's..
Declaration/definition of variables locations in ObjectiveC? http://stackoverflow.com/questions/12632285/declaration-definition-of-variables-locations-in-objectivec starting to work on iOS apps and objective C I've been really puzzled by the different locations where one could be declaring and defining variables. On one hand we have the traditional C approach on the other we have the new ObjectiveC directives that add OO on top of that. Could you folks helps me understand the best practice..
Use CoreData or SQLite on iPhone? [closed] http://stackoverflow.com/questions/1318467/use-coredata-or-sqlite-on-iphone on the iPhone. Even though it seems counterintuitive given how much overhead you'd think the framework has in most cases you can beat the performance of hand tuned SQLite using Core Data. On the iPhone it does a great job of batching fetches to minimize memory usage. The one downside as pointed out is that this limits..
Objective-C - When to use 'self' http://stackoverflow.com/questions/2385980/objective-c-when-to-use-self to be called rather than changing the ivar directly. self.mainViewController aController is equivalent to self setMainViewController aController On the other hand mainViewController aController just changes the mainViewController instance variable directly skipping over any additional code that might be built into UIApplication's..
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 interface to the iPad's window size the user is normally unable to scroll. In other words if I set the window's scrollTop it will remain at 0. If on the other hand the keyboard is shown scrolling suddenly works. So I can set scrollTop immediately test its value and then reset it. Here's how that might look in code using jQuery..
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 this system for choosing associated applications or will they do nothing as before iphone ios cocoa touch ipad share improve this question File type handling is new with iPhone OS 3.2 and is different than the already existing custom URL schemes. You can register your application to handle particular document types.. question File type handling is new with iPhone OS 3.2 and is different than the already existing custom URL schemes. You can register your application to handle particular document types and any application that uses a document controller can hand off processing of these documents to your own application. For example.. existing custom URL schemes. You can register your application to handle particular document types and any application that uses a document controller can hand off processing of these documents to your own application. For example my application Molecules for which the source code is available handles the .pdb and .pdb.gz..
Difference between [UIImage imageNamed…] and [UIImage imageWithData…]? http://stackoverflow.com/questions/316236/difference-between-uiimage-imagenamed-and-uiimage-imagewithdata with some text in a table view UIImage will only keep a single representation of that image in memory instead of allocating 10 separate objects. On the other hand if you have a very large image and you're not re using it you might want to load the image from a data object to make sure it's removed from memory when you're..
http://stackoverflow.com/questions/402/iphone-app-in-landscape-mode 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 to swap between MORE THAN ONE view all landscape IT SIMPLY DOES NOT WORK . It is essential to remember this or you will waste days on the..
OpenGL Texture Coordinates in Pixel Space http://stackoverflow.com/questions/5879403/opengl-texture-coordinates-in-pixel-space ATTRIB_TEXTUREPOSITON iphone objective c cocoa touch opengl es share improve this question This has been asked a few times but I don't have the links at hand so a quick and rough explanation. Let's say the texture is 8 pixels wide 0 1 2 3 4 5 6 7 ^ ^ ^ ^ ^ ^ ^ ^ ^ 0.0 1.0 0 8 1 8 2 8 3 8 4 8 5 8 6 8 7 8 8 8 The digits..
Example or explanation of Core Data Migration with multiple passes? http://stackoverflow.com/questions/5995231/example-or-explanation-of-core-data-migration-with-multiple-passes and convert the values along the migration. This results in twice the values each as a different type in a separate entitiy. To migrate we choose migration by hand and this we do with mapping models. This is also the first part of the answer to your question. We will do the migration in two steps because it's taking long to..
http://stackoverflow.com/questions/603907/uiimage-resize-then-crop at how difficult the other two steps have proved to be. The attached image shows what I am trying to achieve. Would someone please be kind enough to hold my hand Every code example I have found so far seems to smash the image be upside down look like crap draw out of bounds or otherwise just not work correctly. Thank 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 pointer that includes all of the details that ARC needs including the two implicit hidden arguments self and _cmd of every Objective C method call . This is handled in the third line the void on the right hand side simply tells the compiler that you know what you're doing and not to generate a warning since the pointer types.. ARC needs including the two implicit hidden arguments self and _cmd of every Objective C method call . This is handled in the third line the void on the right hand side simply tells the compiler that you know what you're doing and not to generate a warning since the pointer types don't match . Finally you call the function.. or other non objects you could enable compiler features to ignore the warning but it may be dangerous. I've seen Clang go through a few iterations of how it handles return values that aren't assigned to local variables. There's no reason that with ARC enabled that it can't retain and release the object value that's returned..
View Controllers: How to switch between views programmatically? http://stackoverflow.com/questions/910994/view-controllers-how-to-switch-between-views-programmatically views where I can switch between view A and view B. I know I could just use an Tab Bar Controller but I dont want to. I want to see how this is done by hand for learning what's going on under the hood. I have an UIViewController that acts as an root controller @interface MyRootController UIViewController IBOutlet UIView..
How to add a breakpoint to objc_exception_throw? http://stackoverflow.com/questions/1163981/how-to-add-a-breakpoint-to-objc-exception-throw In XCode from the top menu click on Run Show Breakpoints. A new window pops up. Select global breakpoints in the left hand menu. There should be a box on the right under the Breakpoint column with the text Double Click for symbol . Single click..
http://stackoverflow.com/questions/1166444/mkmapview-zoom-and-region longitudeDelta 6 The region could be described using its min and max coordinates as follows min coordinate lower left hand point latitude 4 longitude 3 max coordinate upper right hand point latitude 4 longitude 3 So you can specify zoom levels.. and max coordinates as follows min coordinate lower left hand point latitude 4 longitude 3 max coordinate upper right hand point latitude 4 longitude 3 So you can specify zoom levels around a center point by using an appropriately sized MKCoordinateSpan...
Declaration/definition of variables locations in ObjectiveC? http://stackoverflow.com/questions/12632285/declaration-definition-of-variables-locations-in-objectivec C I've been really puzzled by the different locations where one could be declaring and defining variables. On one hand we have the traditional C approach on the other we have the new ObjectiveC directives that add OO on top of that. Could..
Use CoreData or SQLite on iPhone? [closed] http://stackoverflow.com/questions/1318467/use-coredata-or-sqlite-on-iphone counterintuitive given how much overhead you'd think the framework has in most cases you can beat the performance of hand tuned SQLite using Core Data. On the iPhone it does a great job of batching fetches to minimize memory usage. The one downside..
Disabling iPhone screenshot feature http://stackoverflow.com/questions/1586592/disabling-iphone-screenshot-feature iPhone screenshot feature I'm working on an enterprise iPhone application for a client the issue at hand is customer information will show up on the phone. My client is worried that the information could be caught using the iphone.. profile iphone screenshot share improve this question if your customer could retain the ownership of a handset they can restrict Screen Capture feature using iPhone Configuration Utility . Make sure you don't give these phones to..
Crossplatform iPhone / Android code sharing http://stackoverflow.com/questions/2380258/crossplatform-iphone-android-code-sharing is not the spirit of this question. After experiencing a port of iPhone to Android with no code reuse at all second hand and seeing the pain that person had to endure I'd like to know how other people are avoiding it. java c iphone objective..
Objective-C - When to use 'self' http://stackoverflow.com/questions/2385980/objective-c-when-to-use-self directly. self.mainViewController aController is equivalent to self setMainViewController aController On the other hand mainViewController aController just changes the mainViewController instance variable directly skipping over any additional..
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 user is normally unable to scroll. In other words if I set the window's scrollTop it will remain at 0. If on the other hand the keyboard is shown scrolling suddenly works. So I can set scrollTop immediately test its value and then reset it. Here's..
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 applications or will they do nothing as before iphone ios cocoa touch ipad share improve this question File type handling is new with iPhone OS 3.2 and is different than the already existing custom URL schemes. You can register your application.. with iPhone OS 3.2 and is different than the already existing custom URL schemes. You can register your application to handle particular document types and any application that uses a document controller can hand off processing of these documents.. register your application to handle particular document types and any application that uses a document controller can hand off processing of these documents to your own application. For example my application Molecules for which the source code..
Difference between [UIImage imageNamed…] and [UIImage imageWithData…]? http://stackoverflow.com/questions/316236/difference-between-uiimage-imagenamed-and-uiimage-imagewithdata will only keep a single representation of that image in memory instead of allocating 10 separate objects. On the other hand if you have a very large image and you're not re using it you might want to load the image from a data object to make sure..
http://stackoverflow.com/questions/402/iphone-app-in-landscape-mode 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 to swap between MORE THAN ONE view all landscape IT SIMPLY DOES NOT WORK . It is essential to remember..
OpenGL Texture Coordinates in Pixel Space http://stackoverflow.com/questions/5879403/opengl-texture-coordinates-in-pixel-space c cocoa touch opengl es share improve this question This has been asked a few times but I don't have the links at hand so a quick and rough explanation. Let's say the texture is 8 pixels wide 0 1 2 3 4 5 6 7 ^ ^ ^ ^ ^ ^ ^ ^ ^ 0.0 1.0 0..
Example or explanation of Core Data Migration with multiple passes? http://stackoverflow.com/questions/5995231/example-or-explanation-of-core-data-migration-with-multiple-passes This results in twice the values each as a different type in a separate entitiy. To migrate we choose migration by hand and this we do with mapping models. This is also the first part of the answer to your question. We will do the migration..
http://stackoverflow.com/questions/603907/uiimage-resize-then-crop proved to be. The attached image shows what I am trying to achieve. Would someone please be kind enough to hold my hand Every code example I have found so far seems to smash the image be upside down look like crap draw out of bounds or otherwise..
Linking a static library to an iOS project in XCode 4 http://stackoverflow.com/questions/6124523/linking-a-static-library-to-an-ios-project-in-xcode-4 project navigator the project I'm adding the static library to and in the editor under the header TARGETS in the left hand column select my main project's target and navigate to the Build Phases tab. Click the for Target Dependencies and add the..
http://stackoverflow.com/questions/6851660/version-vs-build-in-xcode-4 .plist file s . This is extended from the how to article here . In Xcode 4.2 5.0 Load your Xcode project. In the left hand pane click on your project at the very top of the hierarchy. This will load the project settings editor. On the left hand.. pane click on your project at the very top of the hierarchy. This will load the project settings editor. On the left hand side of the center window pane click on your app under the TARGETS heading. You will need to configure this setup for each..
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 that ARC needs including the two implicit hidden arguments self and _cmd of every Objective C method call . This is handled in the third line the void on the right hand side simply tells the compiler that you know what you're doing and not to.. arguments self and _cmd of every Objective C method call . This is handled in the third line the void on the right hand side simply tells the compiler that you know what you're doing and not to generate a warning since the pointer types don't.. compiler features to ignore the warning but it may be dangerous. I've seen Clang go through a few iterations of how it handles return values that aren't assigned to local variables. There's no reason that with ARC enabled that it can't retain and..
View Controllers: How to switch between views programmatically? http://stackoverflow.com/questions/910994/view-controllers-how-to-switch-between-views-programmatically view A and view B. I know I could just use an Tab Bar Controller but I dont want to. I want to see how this is done by hand for learning what's going on under the hood. I have an UIViewController that acts as an root controller @interface MyRootController..
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