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2014/10/15 ¤U¤È 10:05:25
iphone Programming Glossary: conclusionHow does the iOS app Display Recorder record the screen without using private API? http://stackoverflow.com/questions/11090184/how-does-the-ios-app-display-recorder-record-the-screen-without-using-private-ap from the IOMobileFramebufferGetLayerDefaultSurface function. Not quite sure what it uses IOKit for though. In conclusion this app uses some sneaky techniques to avoid detection by static analyzers it doesn't link against the private frameworks..
What is resident and dirty memory of iOS? http://stackoverflow.com/questions/13437365/what-is-resident-and-dirty-memory-of-ios is the memory really loaded in your physical memory it mean all the dirty memory and parts of your clean memory. conclusion At any time this is always true virtual memory clean memory dirty memory resident memory dirty memory If you are worrying..
Core Data: does a fetch have to make a trip to persistent store? http://stackoverflow.com/questions/13833529/core-data-does-a-fetch-have-to-make-a-trip-to-persistent-store query result is firstly NSManagedObjectIDs caching is applied to get the NSManagedObject from a NSManagedObjectID. In conclusion it caches object but doesn't cache query result. That means you execute the same NSFetchRequest for 10 times it will query..
iPhone playing video in custom view: Example Code Please? http://stackoverflow.com/questions/1437983/iphone-playing-video-in-custom-view-example-code-please is out of the question. I've been digging through stackoverflow for a while and have come to the conclusion that I would need to use some sort of custom codec video library that I assume would be written in C. My question is basically..
Typical UDP latency on iPhone over 3G - are my numbers right? http://stackoverflow.com/questions/17859732/typical-udp-latency-on-iphone-over-3g-are-my-numbers-right this was originally around 2000 ms TCP also improved but not as much as UDP. I would get 100 200 ms again on 3G. My conclusion is that iPhone powers down the antennae which severely affects UDP. TCP is better because the phone knows of the open connection..
UITextView contentOffset on iOS 7 http://stackoverflow.com/questions/19115233/uitextview-contentoffset-on-ios-7 NSAttributedString objects is Helvetica 12 point which may differ from the default system font for the platform. In conclusion if you use different fonts of different sizes you have to set those to the NSAttributeString instance as well. Otherwise..
How to access SOAP services from iPhone http://stackoverflow.com/questions/204465/how-to-access-soap-services-from-iphone in the iPhone SDK I was not able to find any support for accessing SOAP services a bit of Googling lead to the conclusion that there is no support for SOAP in the iPhone SDK. So if I do want to build that app I'll need to come up with a approach..
UITableView delegate method called twice http://stackoverflow.com/questions/2638359/uitableview-delegate-method-called-twice and most likely you can't skip it. I'm sure you can observe something similar for the numberOfSections method So my conclusion is that due to the the implementation of UITableView there are many situations where certain delegate methods will get called..
Transaction comes back after finishTransaction: has been called on it http://stackoverflow.com/questions/3139280/transaction-comes-back-after-finishtransaction-has-been-called-on-it in app purchase share improve this question This issue was also raised in the developer forums and the general conclusion was that it was down to a difference in the handling of transactions in iPhone OS 4.0. The problem only seems to occur when..
Behaviour for significant change location API when terminated/suspended? http://stackoverflow.com/questions/3421242/behaviour-for-significant-change-location-api-when-terminated-suspended do location processing. UIApplication sharedApplication .applicationState UIApplicationStateBackground I came to this conclusion with a location test harness that you are welcome to download and try out. It is a pretty simple app that allows you to..
Can I disable Home Button on my App? (full screen browser kiosk mode) http://stackoverflow.com/questions/4570511/can-i-disable-home-button-on-my-app-full-screen-browser-kiosk-mode account but we have the same problem if the user press home button he can select Safari and enter to any website. In conclusion we need to disable home button to hold the user on our website I know that if press and hold home button power button iPad..
Repeating NSTimer, weak reference, owning reference or iVar? http://stackoverflow.com/questions/4945028/repeating-nstimer-weak-reference-owning-reference-or-ivar Edit After giving it all some more thought and finding an important flaw in my reasoning I've come to a different conclusion It doesn't matter much whether you hold an owning or a non owning reference to a timer that you need to invalidate. It is..
Notification of YouTube video completion in iPhone app http://stackoverflow.com/questions/4964731/notification-of-youtube-video-completion-in-iphone-app I am afraid you are out of luck. I have searched for the same thing around six months before and came to the conclusion that it is not possible with the current SDK. I have posted a similar question in stack overflow too. http stackoverflow.com..
Xcode 4 Tips and Tricks for Xcode 3 users [closed] http://stackoverflow.com/questions/5260877/xcode-4-tips-and-tricks-for-xcode-3-users
Fetch all events from EventStore EventKit iOS http://stackoverflow.com/questions/6077613/fetch-all-events-from-eventstore-eventkit-ios no good. So other A's from other Q's are not exaclty wha im looking for. Thank you EDIT I have tested and got to the conclusion that i can only fetch events in a period of 4 years maximum. Any way of getting past this Without using multiple fetches....
Embed Google Maps on page without overriding iPhone scroll behavior http://stackoverflow.com/questions/7534888/embed-google-maps-on-page-without-overriding-iphone-scroll-behavior upgrading to v3 neither in figuring out this specific solution nor in setting myself up for future compatibility. In conclusion if you want to embed Google Maps on a mobile page and be able to scroll past it you need to use API v3 disable dragging..
Loading custom UIView from nib, all subviews contained in nib are nil? http://stackoverflow.com/questions/7588066/loading-custom-uiview-from-nib-all-subviews-contained-in-nib-are-nil is that as the nib is deserialized the subviews should at least be initialized during the process The only conclusion I'm coming to on my own is that one of two things is happening either my outlet references are corrupt bad and aren't working..
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 should be to do in practice. You should probably move non ARC code into a separate xcodeproj to simplify this. In conclusion switch to ARC as soon as you can and never look back. EDIT I've seen a couple of comments along the lines of using ARC is..
iPhone: Tracking/Identifying individual touches http://stackoverflow.com/questions/913086/iphone-tracking-identifying-individual-touches touches I have a quick question regarding tracking touches on the iPhone and I seem to not be able to come to a conclusion on this so any suggestions ideas are greatly appreciated I want to be able to track and identify touches on the iphone ie...
Default dataset for Core Data based iPhone application http://stackoverflow.com/questions/978187/default-dataset-for-core-data-based-iphone-application and then deployed the prepared .sqlite file as an application resource. What's the best approach with Core Data. A conclusion In the end I wrote a generic XML handler. Element names are mapped to Objective C class names and property names. PCDATA..
Full webpage and disabled zoom viewport meta tag for all mobile browsers http://stackoverflow.com/questions/11345896/full-webpage-and-disabled-zoom-viewport-meta-tag-for-all-mobile-browsers . meta name viewport content initial scale 1.0 minimum scale 1.0 maximum scale 1.0 width device width user scalable no Conclusion You can use some fairly simple JS to set the content accordingly after some basic browser device detection. I know this..
iCloud NSUbiquitousKeyValueStore initial sync/access delay - how to handle? http://stackoverflow.com/questions/12539266/icloud-nsubiquitouskeyvaluestore-initial-sync-access-delay-how-to-handle settings. No login return enabled iphone ios icloud api nsubiquitouskeyvaluestore share improve this question Conclusion Temporary solution is call synchronize before get data from key value store to be sure it would work turn off iCloud Documents..
UITableView flexible/dynamic heightForRowAtIndexPath http://stackoverflow.com/questions/2213024/uitableview-flexible-dynamic-heightforrowatindexpath your own sizeForCell method that runs through all the options what if the cell is in Value1 style or Value2 etc. Conclusion Question It's just a theory I described in my thoughts I would like to know if what I wrote is correct. Or that maybe there..
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 who will ever see it . Follow good practices and you'll be alright. It's not harder to debug than multi threaded code. Conclusion Method swizzling is safe if used properly. A simple safety measure you can take is to only swizzle in load . Like many things..
In App Purchase user cancels tx while app in background: tx state stays on purchasing http://stackoverflow.com/questions/6311116/in-app-purchase-user-cancels-tx-while-app-in-background-tx-state-stays-on-purch this I sent the app to backgrounding and reactivate it and it will process the fomerly missing cancel transaction. Conclusion A user canceling a payment tx while the app is in background and not being logged in to the store results in late delivery..
iOS5 show numeric keypad by default without using type=“number” or type=“tel” http://stackoverflow.com/questions/8222528/ios5-show-numeric-keypad-by-default-without-using-type-number-or-type-tel type number name number value 500.01 step 0.01 and it will work in many modern browsers. See this jsfiddle for tests. Conclusion You should be able to style it to contain symbols you need. There is also a feature that according to documentation enables..
http://stackoverflow.com/questions/9445090/alarm-clock-app-in-ios so they'll be spending their first seconds of their morning closing those popups not the greatest user experience. Conclusion Alarm Clock apps are good for foreground use only. Best Alarm app out there that will work in any state is the built in..
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