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2014/10/15 ¤U¤È 10:14:13
iphone Programming Glossary: similarlyhttp://stackoverflow.com/questions/1215869/thumbnail-view-of-images nicely Building a view controller You could use TTPhotoViewController from the Three20 project description which acts similarly to the iPhone's built in camera roll to view images. You can look at the Scrolling sample code from apple referred to in..
How to set up gcov for code coverage analysis in iPhone SDK? http://stackoverflow.com/questions/1945229/how-to-set-up-gcov-for-code-coverage-analysis-in-iphone-sdk instructions here http www.cubiclemuses.com cm articles 2009 05 14 coverstory on the iphone which are repeated very similarly in other places. I've tried using Google's AppleScript from their toolbox for Mac to do it just in case I was entering something..
Cocos2d adding a background image to a layer? http://stackoverflow.com/questions/1954936/cocos2d-adding-a-background-image-to-a-layer and removing them. If it helps play with layers in Photoshop or a graphics editing program. Layers in cocos2d work similarly. For a simple scene adding the background to a layer or to a scene won't make much difference. But it doesn't take long..
iPhone: Changing CGImageAlphaInfo of CGImage http://stackoverflow.com/questions/2457116/iphone-changing-cgimagealphainfo-of-cgimage It works in all other context just fine. I encountered this error just by chance but obviously my users might have similarly formatted files so I will have to check my app's imported images and correct for this problem. iphone png alpha cgimage..
why most of the objects we create in iphone are pointers http://stackoverflow.com/questions/3044292/why-most-of-the-objects-we-create-in-iphone-are-pointers
Does NSURLConnection block the main thread? http://stackoverflow.com/questions/3364021/does-nsurlconnection-block-the-main-thread block whatever thread you run it in. Asynchronous mode uses the run loop to behave from the developer's perspective similarly to a background thread but with lower overhead and without any thread safety issues. If using asynchronous mode you want..
viewWillAppear, viewDidAppear not being called, not firing http://stackoverflow.com/questions/3560669/viewwillappear-viewdidappear-not-being-called-not-firing calling the various viewDidAppear etc methods on their embedded subcontrollers and that the view's should be embedded similarly. I think the OP hit this nail right on the head if we're to take UIKit design as a good lead to follow. share improve this..
MKMapView setRegion “snaps” to predefined zoom levels? http://stackoverflow.com/questions/3612007/mkmapview-setregion-snaps-to-predefined-zoom-levels but it returns the region that corresponds to the next higher predefined zoom level instead. setVisibleMapRect behaves similarly. Any further insight or information would be appreciated. I found these related posts but neither included a solution or..
Objective C - How do I use initWithCoder method? http://stackoverflow.com/questions/3943801/objective-c-how-do-i-use-initwithcoder-method aDecoder if self super initWithCoder aDecoder self.instanceVariable aDecoder decodeObjectForKey INSTANCEVARIABLE_KEY similarly for other instance variables .... return self You can initialize the object standard way i.e CustomObject customObject CustomObject..
Drawing bezier curves with my finger in iOS? http://stackoverflow.com/questions/4672646/drawing-bezier-curves-with-my-finger-in-ios stay in objective c you can use UIBezierPath's addCurveToPoint controlPoint1 controlPoint2 method. You can also use a similarly named function with CGPaths. When using bezier curves you need 4 points starting point ending point and a control point..
Does Apple reject “mobile web shell” applications? http://stackoverflow.com/questions/5478848/does-apple-reject-mobile-web-shell-applications
If you have an IBOutlet, but not a property, is it retained or not? http://stackoverflow.com/questions/5523290/if-you-have-an-iboutlet-but-not-a-property-is-it-retained-or-not it is very dubious In iOS the nib loading code uses the setValue forKey method to reconnect each outlet. That method similarly looks for an appropriate accessor method and SO WHAT HAPPENS IF THERE ISN'T ONE TELL US APPLE... falls back on other means..
How can I optimize the rendering of a large model in OpenGL ES 1.1? http://stackoverflow.com/questions/5718846/how-can-i-optimize-the-rendering-of-a-large-model-in-opengl-es-1-1 in the rendering. This will significantly compact your geometry and lead to a nice speed boost in rendering. Bin similarly colored vertices and render them as one group at a set color rather than supplying per vertex color information. The overhead..
How To Get Selected Value From UIPickerView http://stackoverflow.com/questions/5725580/how-to-get-selected-value-from-uipickerview UIDatePicker you can use something like NSDate myDate picker.date But I am using a UIPickerView in my view. How can i similarly get the value selected Or do I have to setup didSelectRow type of method to do this Update This code works for picker with..
JavaScript on iOS: opening an HTML select element http://stackoverflow.com/questions/6097240/javascript-on-ios-opening-an-html-select-element 0 null element.dispatchEvent evt simulateMouseEvent mousedown select UPDATE I've asked a related but different and similarly unanswered question on select boxes here Is there a DOM event that fires when an HTML select element is closed javascript..
How can I write an iPhone app entirely in JavaScript without making it just a web app? http://stackoverflow.com/questions/64420/how-can-i-write-an-iphone-app-entirely-in-javascript-without-making-it-just-a-we I used the view based app. Drag a WebView object onto your interface and resize. Inside of your WebViewController.m or similarly named file depending on the name of your view in the viewDidLoad method NSString filePath NSBundle mainBundle pathForResource..
Need to find Distance using Gyro+Accelerometer http://stackoverflow.com/questions/6647314/need-to-find-distance-using-gyroaccelerometer my C... float dx 0.0f float vx 0.0f for int i 1 i n i vx acceleration_x i 1 acceleration_x i 2.0f dt dx vx dt and similarly for dy and dz. Here float acceleration_x n contains x acceleration values from start to end of measurement at times 0 dt..
What are the differences between nil, NULL and [NSNULL nil]? http://stackoverflow.com/questions/6814427/what-are-the-differences-between-nil-null-and-nsnull-nil
How to log all methods used in iOS app http://stackoverflow.com/questions/7270502/how-to-log-all-methods-used-in-ios-app that will log out the class and method name for every time objc_msgSend is triggered in your application. This works similarly to the DTrace script I described in this answer . To enable this breakpoint action create a new symbolic breakpoint in Xcode..
Is it possible to access a UITableView's ScrollView In Code From A Nib? http://stackoverflow.com/questions/1703023/is-it-possible-to-access-a-uitableviews-scrollview-in-code-from-a-nib
Deploy from XCode 4.6.2 to iOS 7 (beta) device http://stackoverflow.com/questions/17075894/deploy-from-xcode-4-6-2-to-ios-7-beta-device this would be what your app would look like in iOS 7 if deployed from the app store. Assuming you are targeting iOS 4 Similarly if you build the same app using Xcode 5 it tries to incorporate some iOS 7 appearance proxies by default and certainly the..
Max payload size for http request and response, iphone http://stackoverflow.com/questions/1988375/max-payload-size-for-http-request-and-response-iphone images to the server so will be sending NSData of the image as an http request. Is there any limit in that payload. Similarly will there be any limits for the respose also iphone http share improve this question There is no limit that I know..
iphone addressbook - getting null item in ABAddressBookGetPersonWithRecordID http://stackoverflow.com/questions/2138923/iphone-addressbook-getting-null-item-in-abaddressbookgetpersonwithrecordid use @ not d . NSNumber recordId NSNumber numberWithInteger ABRecordGetRecordID person NSLog @ record id is @ recordId Similarly if you have the recordID in an NSNumber object you can get the integer value using integerValue ABRecordRef person ABAddressBookGetPersonWithRecordID..
How to Start UITableView on the Last Cell? http://stackoverflow.com/questions/2156614/how-to-start-uitableview-on-the-last-cell balloons for each message the table appears scrolled all the way to the end. No animation or anything it's just there. Similarly in Tweetie 2 when you load the tweets view it appears right where you last looked at it. No animation to get there it's..
add button to navigationbar programatically http://stackoverflow.com/questions/2848055/add-button-to-navigationbar-programatically I have created the navigation bar programatically by navBar UINavigationBar alloc initWithFrame CGRectMake 0 0 320 44 Similarly I need to add the button on the right side of this navigation bar. For that I used UIView container UIView alloc init create..
javascript scroll event for iPhone/iPad? http://stackoverflow.com/questions/2863547/javascript-scroll-event-for-iphone-ipad the user stops panning ”an onscroll event is generated when the page stops moving and redraws ”as shown in Figure 6 1. Similarly scroll with 2 fingers fires onscroll only after you've stopped scrolling. The usual way of installing the handler works..
push viewcontroller using UINavigationController sometimes calls viewDidAppear: and viewWillAppear: http://stackoverflow.com/questions/2866666/push-viewcontroller-using-uinavigationcontroller-sometimes-calls-viewdidappear calls these methods directly on the controller that's being pushed when you call pushViewController animated Similarly UITabBarController calls these methods directly when you switch tabs and UIViewController calls them when you use presentModalViewController..
http://stackoverflow.com/questions/3926711/water-effect-in-cocos2d to wave an image a little bit. CCWaves3D seem ok but leave have nasty black artifacts around the edges when I run it. Similarly CCShaky3D. CCLiquid brings my app down from 20fps to 5fps.. Is there any other effect I might want to try out Or perhaps..
Objective C - How do I use initWithCoder method? http://stackoverflow.com/questions/3943801/objective-c-how-do-i-use-initwithcoder-method NSCoder enCoder super encodeWithCoder enCoder enCoder encodeObject instanceVariable forKey INSTANCEVARIABLE_KEY Similarly for the other instance variables. .... And in the initWithCoder method initialize as follows id initWithCoder NSCoder aDecoder..
Is there a way to toggle bluetooth and/or wifi on and off programatically in iOS? http://stackoverflow.com/questions/4518406/is-there-a-way-to-toggle-bluetooth-and-or-wifi-on-and-off-programatically-in-ios on Springboard that I can just tap and it will turn off the wifi if it's on and vice versa then immediately quit. Similarly with an App for toggling bluetooth ™s state. I have the developer SDK and am comfortable in Xcode and with iOS development..
UISegmentedControl setSelectedSegmentIndex: without valueChanged Action http://stackoverflow.com/questions/4570941/uisegmentedcontrol-setselectedsegmentindex-without-valuechanged-action a UISlider's value doesn't emit a Value Changed event. Setting a UISwitch's on doesn't emit a Value Changed event. Similarly setting a UITextField's text doesn't emit an Editing Changed event. So the fact that changing a UISegmentedControl's selectedSegmentIndex..
http://stackoverflow.com/questions/4862707/floodfill-in-iphone is X so that stops down is O so that stops but left 2 2 is the same a dot so it starts a new flood fill from there. Similarly the right branch from the original flood fill began from 4 3 . The only branch it can use is down 4 4 . Now we have this..
Set to nil in viewDidUnload, but release in dealloc http://stackoverflow.com/questions/5737312/set-to-nil-in-viewdidunload-but-release-in-dealloc dealloc label release super dealloc If we look at viewDidUnload first it's pretty simple. self.label nil is correct. Similarly correct would be self setLabel nil . And while not quite as good it would also be acceptable to write label release label..
Why does Cocoa return an empty string occasionally? http://stackoverflow.com/questions/608608/why-does-cocoa-return-an-empty-string-occasionally so the question remains. hash is certainly returning with a non NULL value. If I force a NULL here the app crashes. Similarly postHash is not nil as that would also crash the app for the same reason . I am thinking that this is possibly memory related...
Xcode: Connection Between View Controllers and App Delegate http://stackoverflow.com/questions/6560772/xcode-connection-between-view-controllers-and-app-delegate appDelegate.myVC self At this point you now have a direct connection to your view controller from the app delegate. Similarly you could do the opposite to call app delegate methods from the view controller. In that case you'd set up a delegate in..
Two views Multiple UIPickerViews Single outlet http://stackoverflow.com/questions/6704357/two-views-multiple-uipickerviews-single-outlet And it sounds like you're selecting the appropriate view in willAnimateRotationToInterfaceOrientation duration . Similarly you could declare two outlets for your picker views @property nonatomic retain IBOutlet UIPickerView landscapePickerView..
Programmatically build / navigate a Navigation Controller http://stackoverflow.com/questions/7241923/programmatically-build-navigate-a-navigation-controller view controller. Then the user chooses their model and you pushViewController animated the Color view controller. Similarly the user chooses a color and you push the Pippo view controller. Now if the user presses back or you call popViewControllerAnimated..
Changing the position of custom UIButton in custom UITableViewCell http://stackoverflow.com/questions/8352530/changing-the-position-of-custom-uibutton-in-custom-uitableviewcell when the table is initially displayed. But when I scroll past the cells and come back to it it gets displayed. Similarly when I first scroll to cells not visible initially there is no change. The change occurs when I scroll to it the second..
iPhone - Problem with UITextView http://stackoverflow.com/questions/889925/iphone-problem-with-uitextview on the internet. Searching for Apple documentation UITextView gives you this link to the class documentation. Similarly here is the documentation for the UITextViewDelegate. Searching for UITextView simple example gives you this useful example..
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