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2014/10/15 ¤U¤Č 10:09:56
iphone Programming Glossary: guaranteeDetect at runtime which country's App Store my iPhone app was downloaded from? http://stackoverflow.com/questions/1112046/detect-at-runtime-which-countrys-app-store-my-iphone-app-was-downloaded-from locale objectForKey NSLocaleCountryCode if countryCode isEqualToString @ US US Only However since there's no guarantee that the user won't change their international settings you might have no choice but to release separate apps one for a..
NSManagedObjectContext performBlockAndWait: doesn't execute on background thread? http://stackoverflow.com/questions/11831946/nsmanagedobjectcontext-performblockandwait-doesnt-execute-on-background-thread performBlock ^ NSLog @ Two context performBlockAndWait ^ NSLog @ Three Note that strict adherence to the FIFO guarantee of the queue would mean that the nested performBlockAndWait Three would run after the asynchronous block Two since it was..
Get notified when UITableView has finished asking for data? http://stackoverflow.com/questions/1483581/get-notified-when-uitableview-has-finished-asking-for-data view controller UITableViewController are of use here as they all fire too early. None of them entirely understandably guarantee that queries to the data source have finished for the time being eg until the view is scrolled . One workaround I have found.. . One workaround I have found is to call reloadData in viewDidAppear since when reloadData returns the table view is guaranteed to have finished querying the data source as much as it needs to for the time being. However this seems rather nasty as..
http://stackoverflow.com/questions/1934187/oauth-secrets-in-mobile-apps hear some knowledgeable peoples' opinions on this. It doesn't seem to me that most apps are going to these lengths to guarantee security for example Facebook Connect seems to assume that you put the secret into a string right in your app . Another..
how to check installed application in iphone device http://stackoverflow.com/questions/3243567/how-to-check-installed-application-in-iphone-device
Subclassing NSOperation to be concurrent and cancellable http://stackoverflow.com/questions/3859631/subclassing-nsoperation-to-be-concurrent-and-cancellable checking your own _isCancelled instance variable to determine whether the operation has been cancelled. NSOperation guarantees that self isCancelled will return YES if the operation has been cancelled. It does not guarantee that your custom setter.. NSOperation guarantees that self isCancelled will return YES if the operation has been cancelled. It does not guarantee that your custom setter method will be called nor that your own instance variable is up to date. You should be checking..
Getting displacement from accelerometer data with Core Motion http://stackoverflow.com/questions/4449565/getting-displacement-from-accelerometer-data-with-core-motion 10 cm and a given minimum velocity for your motions then I believe there might be the chance to find a solution no guarantee at all. If so it will take you a pretty hard time of research and a lot of frustration but if you get it it will be very..
Alternatives For iOS Development Under Windows [duplicate] http://stackoverflow.com/questions/4533847/alternatives-for-ios-development-under-windows
HTML <select> element is abbreviated in iPhone or Android browsers http://stackoverflow.com/questions/4554831/html-select-element-is-abbreviated-in-iphone-or-android-browsers looking jQuery UI Selectmenu prototype . Unfortunately it's not yet compatible with jquery ui 1.8.5 and there is no guarantee when it will be stable. I am using jquery and jquery ui 1.8.5 so any ideas references to plugins are very welcome. Any other..
NSMutableString as retain/copy http://stackoverflow.com/questions/4995254/nsmutablestring-as-retain-copy expected behavior. in other words there is not a use for retaining a string if it is in fact immutable. in order to guarantee that you're dealing with an immutable string you simply copy at creation and set. If yes can I just replace retain to copy.. string is small or does not change frequently. by adding the mutable string to the interface as above you'll have to guarantee thread safety manually. in many cases it is optimal to do something along these lines @interface MONThing NSObject NSString..
Can somebody explain the process of a UIViewController birth (which method follows which)? http://stackoverflow.com/questions/5107604/can-somebody-explain-the-process-of-a-uiviewcontroller-birth-which-method-follo The awakeFromNib method is called for every object that is instantiated when a nib file is loaded and there is no guarantee that the other objects in the nib file will have been fully loaded when it is called. 3. Displaying views viewWillAppear..
what is the difference between Delegate and Notification? http://stackoverflow.com/questions/5325226/what-is-the-difference-between-delegate-and-notification so you know when you compile if you're missing any required methods. With NSNotificationCenter you have no such guarantee. NSNotificationCenter is kind of hack ish and is frequently used novice programmers which can lead to poor architecture...
Post photo on user's wall using Facebook iOS SDK http://stackoverflow.com/questions/6702135/post-photo-on-users-wall-using-facebook-ios-sdk iphone objective c facebook share improve this question It's clearer what you wish to do post a photo to FB and guarantee that a post goes on the user's wall stream. Unfortunately there are some things in the way. FB Graph API appears to only..
UITableView - scroll to the top http://stackoverflow.com/questions/724892/uitableview-scroll-to-the-top scroll to the top In my table view I have to scroll to the top. But I cannot guarantee that the first object is going to be section 0 row 0. May be that my table view will start from section number 5. So I get..
Need some help understanding transient properties in Core Data http://stackoverflow.com/questions/7504391/need-some-help-understanding-transient-properties-in-core-data any time but are you telling me they might not even be instances of my class Or if you use a custom subclass are they guaranteed to be the sort of faults that are instances of NSManagedObject specifically my subclass If they aren't instances of the.. grid if the value of grid depends on the values of any modeled properties of the Board class. That is the only way to guarantee that grid will always be populated when you access it. I thought if it depended on the values of modeled properties then.. They can't have any instance methods that aren't modeled property getters or setters because the object can't be guaranteed to exist in a useable state when they are called. Exception instance methods that are just helper methods for property..
applicationWillTerminate when is it called and when not http://stackoverflow.com/questions/7818045/applicationwillterminate-when-is-it-called-and-when-not In short unless you have UIApplicationExitsOnSuspend in your Info.plist set to YES in iOS4 and above there is no guarantee that applicationWillTerminate will ever get called. As the documentation says For applications that support background execution..
why is “error:&error” used here (objective-c) http://stackoverflow.com/questions/8334518/why-is-errorerror-used-here-objective-c executeFetchRequest someRequest error error if error nil handle error First of all the variable scoping rules guarantee that error can not be nil so the if error nil ... condition will always be true but even if you wanted to check for specific..
How to capture current view screenshot and reuse in code? (iPhone SDK) http://stackoverflow.com/questions/879064/how-to-capture-current-view-screenshot-and-reuse-in-code-iphone-sdk in the manually rotated view etc. Thoughts iphone core animation rotation share improve this question I can guarantee you window drawRect won't work. Most views don't implement drawRect and it's certainly not recursive like on the mac. drawInContext..
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