2014/10/15 下午 10:06:54
iphone Programming Glossary: discussedhttp://stackoverflow.com/questions/1342674/motionbegan-not-working in the iPhone Developer Forums requires registration as a developer . Update implementing in a subclass of UIView As discussed in the comments this also works not too surprisingly in a subclass of UIView . Here's how to construct a minimal example...
How to Add Core Data to an existing Utility Application http://stackoverflow.com/questions/1528341/how-to-add-core-data-to-an-existing-utility-application NSPersistentStoreCoordinator and NSManagedObjectContext objects. Adding Core Data to an existing application is discussed briefly in this Apple document search for existing application You should also view the Apple tutorial to get a feel for..
MFMailComposeViewController image orientation http://stackoverflow.com/questions/20204495/mfmailcomposeviewcontroller-image-orientation each step along the way and on the distant end when the images embedded in your E Mail is displayed. Everything I 脎e discussed in the answer I have personally single stepped and watched it happen. So here my final code that works gImag PIMG info valueForKey..
Make UINavigationBar transparent http://stackoverflow.com/questions/2315862/make-uinavigationbar-transparent YES Discussion Setting translucent to YES on the navigation bar does the trick due to a behavior discussed in the UINavigationBar documentation. I'll report here the relevant fragment If you set this property to YES on a navigation..
Select videos using UIImagePickerController in 2G/3G http://stackoverflow.com/questions/2758466/select-videos-using-uiimagepickercontroller-in-2g-3g to other threads. I have built the app for both 3.0 base SDK and 3.1 but with the same results. This issue is already discussed in the thread http www.iphonedevsdk.com forum iphone sdk development 36197 uiimagepickercontroller does not show movies..
Detect retina screen/iPhone 4 in iPhone SDK http://stackoverflow.com/questions/3272752/detect-retina-screen-iphone-4-in-iphone-sdk share improve this question Just did some reading on the official Apple Developers Forums and the issues has been discussed in length there. The best way to me seems to be the use of the scale property of UIScreen . Although it is only available..
iPhone Browser simulator for Windows? http://stackoverflow.com/questions/3882233/iphone-browser-simulator-for-windows on the iPhone not simulating the whole device. I know that iPhone device simulation is not possible on Windows as discussed at length here . I have a web site that looks really weird when viewed on an iPhone its some sort of CSS issue. The same..
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 no matter how small or obvious to improve the performance memory handling of Drawing PDF's or any other issues discussed here EDIT Some Tips Credit Luke Mcneice VdesmedT Matt Gallagher Johann Save any media to disk when you can. Use larger tileSizes..
Architectural and design question about uploading photos from iPhone app and S3 http://stackoverflow.com/questions/4481311/architectural-and-design-question-about-uploading-photos-from-iphone-app-and-s3 need for my server to store the photo at all. iphone ios mobile ios4 amazon s3 share improve this question I've discussed this issue on the AWS forums before. As I say there the proper solution for accessing AWS from a mobile device is to use..
Can't find momd file: Core Data problems http://stackoverflow.com/questions/4536414/cant-find-momd-file-core-data-problems of the MOC all by one step. You should use this. But note that you need to clean the build process once in a while as discussed in this SO question answer . This shows that although crawling through StackOverflow is often good that's not the best approach..
How to Sync iPhone Core Data with web server, and then push to other devices? http://stackoverflow.com/questions/5035132/how-to-sync-iphone-core-data-with-web-server-and-then-push-to-other-devices data synchronization share improve this question I suggest carefully reading and implementing the sync strategy discussed by Dan Grover at iPhone 2009 conference available here as a pdf document. This is a viable solution and is not that difficult..
http://stackoverflow.com/questions/5352457/cgfloat-based-math-functions Cocoa automatically tgmath doesn't so you'll need to declare it somewhere . There are a number of potential solutions discussed at the Cocoa mailing list thread http www.cocoabuilder.com archive cocoa 291802 math functions with cgfloat.html I would..
iPhone - Writing NSMutableDictionary to file http://stackoverflow.com/questions/5361630/iphone-writing-nsmutabledictionary-to-file it is written out to file. One particular limitation that has been known to cause problems and which is not thoroughly discussed in the official API documentation is that all of the keys in your dictionary must be of type NSString and your values must..
How do I create delegates in Objective-C? http://stackoverflow.com/questions/626898/how-do-i-create-delegates-in-objective-c contains. To define your own delegates you'll have to declare their methods somewhere. There are two basic approaches discussed in the Apple Docs on protocols 1 An Informal Protocol This can be done as NSWindow does in a category on NSObject. For example..
Storing UIImage in Core Data with the new External Storage flag http://stackoverflow.com/questions/7924840/storing-uiimage-in-core-data-with-the-new-external-storage-flag UIImage in Core Data with the new External Storage flag I know that the storing of UIImage's in core data has been discussed a lot such as here but that was pre ios5. Now that we have the external storage flag do you guys think it would be a fine..
http://stackoverflow.com/questions/845662/core-animation-or-opengl-es
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 ObjC exceptions you're using them incorrectly. This is fixable using fobjc arc exceptions but 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..
Best practices for iOS applications security http://stackoverflow.com/questions/9448632/best-practices-for-ios-applications-security you communicate with. #2 what are best ways to reduce revenue loss and minimise hacking exposure This has been discussed many times on SO. This answer includes links to several of the other discussions Secure https encryption for iPhone app.. wants. There are some basic things you can do that are worth it just as they say to keep honest people honest some are discussed in the various linked discussions . But don't lie awake nights worrying about how to thwart pirates. Lie awake worrying..
UIScrollView image/photo viewer with paging enabled and zooming http://stackoverflow.com/questions/975708/uiscrollview-image-photo-viewer-with-paging-enabled-and-zooming Apple has released the 2010 WWDC session videos to all members of the iphone developer program. One of the topics discussed is how they created the photos app They build a very similar app step by step and have made all the code available for free...
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