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2014/10/15 ¤U¤È 10:14:40
iphone Programming Glossary: supposeHow can I upload a photo to a server with the iPhone? http://stackoverflow.com/questions/125306/how-can-i-upload-a-photo-to-a-server-with-the-iphone app that takes a photo and then uploads it to a server. How do I upload a photo to a server with Cocoa in Xcode I suppose I use NSUrl somewhere. Thanks iphone cocoa touch cocoa networking share improve this question Header @interface EPUploader..
What's the point of NSAssert, actually? http://stackoverflow.com/questions/1375786/whats-the-point-of-nsassert-actually may a 0.9 or 1.1 iphone cocoa touch uikit share improve this question Assert is to make sure a value is what its suppose to be. If assertion fails that means something went wrong and so the app quits. One reason to use assert would be if you..
Keeping a UIButton selected after a touch http://stackoverflow.com/questions/1785008/keeping-a-uibutton-selected-after-a-touch NO after my network op finishes but it doesn't seem to do anything. Same thing if I call setHighlighted . I suppose I could try swapping out the background image to denote a selected state for the duration of the network op but that seems..
Dynamic (Default.png) splashscreen in 3.0 [iPhone SDK] http://stackoverflow.com/questions/1959080/dynamic-default-png-splashscreen-in-3-0-iphone-sdk Apple don't intend the Default.png to be a splash screen . If you read the HIG you'll see that the Default.png is suppose to represent your user interface as it would be empty without any content. It is intended to give the user the illusion..
iPhone - What are reuseIdentifiers (UITableViewCell)? http://stackoverflow.com/questions/2152180/iphone-what-are-reuseidentifiers-uitableviewcell decides whether or not a cell is reusable If I've got two identical visually cells but with different texts well I suppose they aren't entirely identical can they both have the same identifier Or should they have different ones Or in what situation.. identical can they both have the same identifier Or should they have different ones Or in what situation are you supposed to use different identifiers Can anyone clarify or link to a place where it is iphone objective c uitableviewcell reuseidentifier..
Rounded UIView using CALayers - only some corners - How? http://stackoverflow.com/questions/2264083/rounded-uiview-using-calayers-only-some-corners-how Top left Bottom left Top right Bottom right Above this buttons there is an image view or we can use also UIView. Now suppose user taps on top left button. Above image view should be rounded from that particular corner. I am having some difficulty..
COMET (server push to client) on iPhone http://stackoverflow.com/questions/337985/comet-server-push-to-client-on-iphone should be pushed from the server to any clients keeping a live poll to the server. The buzzword for this is COMET I suppose. I know there is DWR out there for web browser applications so I'm thinking maybe it's best to set a hidden UIWebView in..
Is it possible to cache resources loaded in an iPhone UIWebView? http://stackoverflow.com/questions/345432/is-it-possible-to-cache-resources-loaded-in-an-iphone-uiwebview Incoming requests are at least indicating that it accepts compression accept encoding gzip deflate so that's good I suppose. I read this yui study which seems to indicate that the iPhone will cache 25k per item. The only thing referenced that is..
UIButton block equivalent to addTarget:action:forControlEvents: method? http://stackoverflow.com/questions/3908003/uibutton-block-equivalent-to-addtargetactionforcontrolevents-method blocks equivalent API to button addTarget self action @selector tappy forControlEvents UIControlEventTouchUpInside I suppose this could be implemented using a category but would rather not write this myself due to extreme laziness Something like..
Inner shadow effect on UIView layer? http://stackoverflow.com/questions/4431292/inner-shadow-effect-on-uiview-layer gradient atIndex 0 I'd like to add an inner shadow effect to it but I am not quite sure how to do this. I suppose I would be required to draw in drawRect however this would add the layer on top of other UIView objects since it's supposed.. I would be required to draw in drawRect however this would add the layer on top of other UIView objects since it's supposed to be a bar behind some buttons so I am at a loss as to what to do I could add another layer but again not sure how to..
Invoke native date picker from web-app on iOS/Android http://stackoverflow.com/questions/4946919/invoke-native-date-picker-from-web-app-on-ios-android platforms using HTML5. Currently an input type date field just opens the standard soft keyboard on Android and iOS. I suppose that in the future the mobile OS's soft keyboards will include date pickers and such just as select invokes the native select..
How to make ui responsive all the time and do background updating? http://stackoverflow.com/questions/5133731/how-to-make-ui-responsive-all-the-time-and-do-background-updating touch responsiveness I want them to run independent of the main thread which is resposible for handling touch events i suppose . Also i would like to mention that when a thumbnail is created i trigger a Async download of the image and the delegate..
how to tell if uiview is in middle of animation? http://stackoverflow.com/questions/5526476/how-to-tell-if-uiview-is-in-middle-of-animation send animationKeys to it which will give you an array of keys which identify the animations attached to the layer. I suppose that if there are any entries the animation s are running. If you want to dig even deeper have a look at the CAMediaTiming..
NSString @property, using copy instead of retain http://stackoverflow.com/questions/587414/nsstring-property-using-copy-instead-of-retain whether or not the object's property shares the same value with what you're setting it to. Consider the following code suppose the 'foo' property is declared 'retain' and the 'bar' property is declared 'copy' NSFoo foo ... NSBar bar ... someObject.foo..
Memory limit and iOS memory allocation in iphone SDK? http://stackoverflow.com/questions/6044147/memory-limit-and-ios-memory-allocation-in-iphone-sdk and iOS memory allocation in iphone SDK Does iOs use non contiguous or contiguous allocation in memory management suppose if user allocates more than 128 MB Will the App be closed or Memory will be managed by iOS as if user allocates memory and..
How do I create delegates in Objective-C? http://stackoverflow.com/questions/626898/how-do-i-create-delegates-in-objective-c delegates that use a formal protocol you must declare your delegate to implement that protocol see below. For example suppose you have an NSWindow. If you'd like to implement its delegate's windowDidMove method you could create a class like this..
Whats a simple way to get a text input popup dialog box on an iPhone http://stackoverflow.com/questions/6319417/whats-a-simple-way-to-get-a-text-input-popup-dialog-box-on-an-iphone see there are some more styles defined. Hope this helped EDIT I was playing around with the alertView a little and I suppose it needs no announcement that it's perfectly possible to edit the textField as desired you can create a reference to the.. sure if you can prevent the UIAlertView from dismissing though there is no shouldDismiss delegate function AFAIK so I suppose if the user input is invalid you have to put up a new alert or just re show this one until correct input was entered. Have..
How to programmatically determine iPhone interface orientation? http://stackoverflow.com/questions/634745/how-to-programmatically-determine-iphone-interface-orientation there a way to find the current orientation of the GUI in cases where the device is returning ambiguous information I suppose I could track orientation change events to remember the last portrait landscape orientation or check the main UIView's bounds..
http://stackoverflow.com/questions/7989864/watching-memory-usage-in-ios user experience. Is there any way that I can find out when I am about to run out of memory and stop the task instead I suppose I could put the task on a separate thread and maybe the system would send the main thread a low memory warning but that..
http://stackoverflow.com/questions/11290661/how-to-get-all-the-pending-push-notifications-from-ios-notification-center-after applicationDidFinishLaunching method in which the delegate can obtain the remote notification payload. My question is Suppose user got 3 4 Push notifications from provider and all are stored in apple's notification center. If user tapped on notification..
IOS 6 force device orientation to landscape http://stackoverflow.com/questions/12640870/ios-6-force-device-orientation-to-landscape app with say 10 view controllers. I use navigation controller to load unload them. All but one are in portrait mode. Suppose the 7th VC is in landscape. I need it to be presented in landscape when it gets loaded. Please suggest a way to force the..
-viewDidLoad not called in subclassed UIViewController http://stackoverflow.com/questions/1479576/viewdidload-not-called-in-subclassed-uiviewcontroller calls loadView to supply the extra call to viewDidLoad . In some cases the SDK will handle this behavior for you. Suppose you have a subclass of UIViewController called MyViewController then If you access myViewController.view before you call..
API for Voice recognition in among group http://stackoverflow.com/questions/1651051/api-for-voice-recognition-in-among-group they speak their liking words then i have to tell in text format who use his liking words and how many times. Suppose A store his liking word Hello B store his liking word Wow C store his liking word Mango D store his liking word Great if..
How to preserve iPhone application state before terminating the application? http://stackoverflow.com/questions/1811696/how-to-preserve-iphone-application-state-before-terminating-the-application and navigation controllers. It is working fine for now. Now I want the application to save its state before quitting. Suppose I have 6 tabs and If an incoming call comes so after relaunching the app I should see the tab selected that was lastly selected..
Need approach to show tables using segmented control? http://stackoverflow.com/questions/2078200/need-approach-to-show-tables-using-segmented-control control on a view. With the help of this segmented control I would like to display to different tables on my view Suppose I have two segments in my table on tap of segment 1 I would like to display table 1 and on tap of segment 2 I would like..
UIScrollView - with paging enabled, can I “change” the page width? http://stackoverflow.com/questions/2256081/uiscrollview-with-paging-enabled-can-i-change-the-page-width set to YES have a page width set to something other than the scroll view's bounds Let me give an example. Suppose I have a scroll view with 10 items each 150 pixels wide and my scroll view is 300 pixels wide. If I start with views 1 and..
Display html text in uitextview http://stackoverflow.com/questions/2454067/display-html-text-in-uitextview display html text in textview for example string h1 Krupal testing span style font weight bold Customer WYWO span h1 Suppose text is bold so it display in textview as bold string but i want display normal text.is this possible in iphone sdk. Thanks..
http://stackoverflow.com/questions/3320355/how-should-i-approach-building-a-universal-ios-app-that-will-include-ios-4-featu OS versions on devices that do support the classes. Using methods only if they are available on the current device Suppose you'd like to do the following UIApplication sharedApplication scheduleLocalNotification n Use the following piece of code..
Passing parameters on button action:@selector http://stackoverflow.com/questions/3716633/passing-parameters-on-button-actionselector buttonClicked.argOne This was my original suggestion. There is a way to achieve the same result but it's not pretty. Suppose you want to add a parameter to your navigate method. The code below will not allow you to pass that parameter to navigate..
Concurrency and serial queues in Grand Central Dispatch http://stackoverflow.com/questions/5026043/concurrency-and-serial-queues-in-grand-central-dispatch I love Grand Central Dispatch and after using it with relative success but this is something I don't fully understand. Suppose I have created my own serial queue using dispatch_queue_t myQueue myQueue dispatch_queue_create myQueue NULL After that..
iphone: expand and collapse a UIView programmatically http://stackoverflow.com/questions/5151250/iphone-expand-and-collapse-a-uiview-programmatically field and lables which should appear and disappear with that view iphone xcode ipad share improve this question Suppose you have a UIView instance in the UIViewController class like this UIView view UIView alloc initWithFrame CGRectMake x y..
iPhone - understanding iPhone rotation http://stackoverflow.com/questions/5170010/iphone-understanding-iphone-rotation understanding iPhone rotation I am banging my head on the wall trying to understand this. See the next picture. Suppose I have an iPhone resting on a table. At this time the rotation readings thru core motion are 0 0 0 for yaw roll and pitch.. right side on the table. Home button on the left. It now reads 180 0 0 picture C . The problem comes if I roll it now. Suppose I roll it 45 degrees. I should be reading 180 45 0 but instead I am reading 180 45 180 picture D . Why is that Why is it..
iphone “unable to open database file” for call_history.db in xcode app http://stackoverflow.com/questions/5498291/iphone-unable-to-open-database-file-for-call-history-db-in-xcode-app share improve this question Your app is in a sandbox which is not able to access anything outside of itself. Suppose your targeting jailbroken devices this is another story. Xcode will install your app into a sandboxed environment. You need..
How to show and edit existing PDF files in ios application http://stackoverflow.com/questions/7644340/how-to-show-and-edit-existing-pdf-files-in-ios-application edit existing pdf file in iOS through code.. Is this possible or not and if possible than how can I do this... Update Suppose there will be text document pdf and we want to enter some other text in that file and save it..so how to do this by programming..
What is the difference between these two ways of allocating memory in Objective-C? http://stackoverflow.com/questions/8211075/what-is-the-difference-between-these-two-ways-of-allocating-memory-in-objective ways of allocating memory in Objective C I am confused about the proper means of allocating memory in Objective C. Suppose I have an NSMutableDictionary. There are two ways I can initialize it NSMutableDictionary alpha NSMutableDictionary alloc..
Loading records to a TableView - (More button) http://stackoverflow.com/questions/9179083/loading-records-to-a-tableview-more-button Display the More button after displaying all 100 records. moreButtonClickAction void moreButtonClickAction NSLog @ Suppose to load the next 10 records numberOfRowsInSection NSInteger tableView UITableView tableView numberOfRowsInSection NSInteger..
“Apple Mach-O linker command failed with exit code 1” http://stackoverflow.com/questions/9809477/apple-mach-o-linker-command-failed-with-exit-code-1 in your project it could be the problem. To avoid that compiling error use Add Files to YourProjectName instead. Suppose you have a directory that contains .h and .m files called SVProgressHUD in your desktop. Now you have to Remove previous..
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