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2014/10/15 ¤U¤È 10:15:07
iphone Programming Glossary: turnsUIView doesn't resize to full screen when hiding the nav bar & tab bar http://stackoverflow.com/questions/1110052/uiview-doesnt-resize-to-full-screen-when-hiding-the-nav-bar-tab-bar bar off the bottom and top of the screen respectively leaving a 49px high white space where the tab bar was. It turns out that the reason my new fullscreen view wasn't actually filling the space was because I was adding the fullscreen view..
Can I localize a UIDatePicker? http://stackoverflow.com/questions/1151335/can-i-localize-a-uidatepicker all other country specific format properties for that matter defaults to the value returned by currentLocale which in turns depends on the iphone's country settings not the language settings. You need to set the appropriate country in the iphone..
iPhone how to check that a string is numeric only http://stackoverflow.com/questions/1320295/iphone-how-to-check-that-a-string-is-numeric-only in my Mac app the same or similar should work with the iPhone. It's based on the RegexKitLite regular expressions and turns the text red when its invalid. static bool TextIsValidValue NSString newText double value bool result false if newText isMatchedByRegex..
How to correctly setup a NSPredicate for a to-many relationship when using Core Data? http://stackoverflow.com/questions/1347776/how-to-correctly-setup-a-nspredicate-for-a-to-many-relationship-when-using-core core data Thank you in advance this is now driving me crazy. iphone core data share improve this question It turns out this is yet another problem with missing and or inconsistent documentation. The correct predicate in this case is the..
NSDateFormatter, am I doing something wrong or is this a bug? http://stackoverflow.com/questions/143075/nsdateformatter-am-i-doing-something-wrong-or-is-this-a-bug PM Am I doing something wrong or is this a bug with firmware 2.1 Edit 1 Made description clearer Edit 2 workaround It turns out this is a bug to fix it I set the AM and PM characters to dateFormatter setAMSymbol @ dateFormatter setPMSymbol @ iphone..
iphone sdk CGAffineTransform getting the angle of rotation of an object http://stackoverflow.com/questions/2051811/iphone-sdk-cgaffinetransform-getting-the-angle-of-rotation-of-an-object share improve this question Technically you can't because the transform can include a skew operation which turns the image into a parallelogram and the rotation angle isn't defined anymore. Anyway since the rotation matrix generates..
iPhone : making UIBarButtonItem that is arrow shaped http://stackoverflow.com/questions/2330157/iphone-making-uibarbuttonitem-that-is-arrow-shaped self.navigationItem.rightBarButtonItem UIBarButtonItem alloc initWithCustomView forwardButton Note it turns out that if you try to set the target and action directly on the button item after assigning a custom view using a UIButton..
Hide/Show iPhone Camera Iris/Shutter animation http://stackoverflow.com/questions/3138502/hide-show-iphone-camera-iris-shutter-animation for App Store commitment. However the NSLogs are used to figure out which subview is the actual Camera Preview which turns out to be the PLPreviewView. uncomment to se the printouts . Change it's size to fit the entire screen and scale it accordingly..
How can I programmatically force-stop scrolling in a UIScrollView? http://stackoverflow.com/questions/3410777/how-can-i-programmatically-force-stop-scrolling-in-a-uiscrollview NO on the theory that given a rect that's already known visible the scrolling will just stop where it is but it turns out that this doesn't have any effect apparently the scroll view sees that the given rect is in bounds and takes no action...
IPhone/IPad: How to get screen width programmatically? http://stackoverflow.com/questions/3655104/iphone-ipad-how-to-get-screen-width-programmatically a look at the applicationFrame property if you don't want the status bar included won't affect the width . UPDATE It turns out UIScreen bounds or applicationFrame doesn't take into account the current interface orientation. A more correct approach..
Making a custom Button using a UIView or overriding UIButton? http://stackoverflow.com/questions/3679239/making-a-custom-button-using-a-uiview-or-overriding-uibutton iphone objective c share improve this question You should not I'd almost say you can't subclass UIButton as it turns out to be a class cluster and it would be impractical read impossible to derive from that. So your two options are 1 Use..
How to animate the background color of a UILabel? http://stackoverflow.com/questions/3762561/how-to-animate-the-background-color-of-a-uilabel to animate the background color of a UILabel This looks like it should work but doesn't. The color turns green at once. self.labelCorrection.backgroundColor UIColor whiteColor UIView animateWithDuration 2.0 animations ^ self.labelCorrection.backgroundColor..
how to programmatically fake a touch event to a UIButton? http://stackoverflow.com/questions/4028734/how-to-programmatically-fake-a-touch-event-to-a-uibutton itself. What's the preferred method of doing this iphone uibutton touch event share improve this question It turns out that buttonObj sendActionsForControlEvents UIControlEventTouchUpInside got me exactly what I needed in this case. share..
NSMutableString as retain/copy http://stackoverflow.com/questions/4995254/nsmutablestring-as-retain-copy and set. If yes can I just replace retain to copy in my app and remove the release in dealloc copy like retain returns an object which you must explicitly release e.g. in dealloc in non garbage collected environments. immutable strings are.. to the NSMutable type details. the implementation of property syntax invokes copy . as we know NSMutableString copy returns an immutable NSString. this is an issue waiting to happen for a naive implementation since your NSMutableString ivar is.. declare implement your property as follows @interface MONThing NSObject @private NSMutableString str1 note passes returns NSString @property nonatomic copy NSString str1 @end @implementation MONThing no need for clients to create a mutableCopy..
Xcode won't recognize my new provisioning profile http://stackoverflow.com/questions/5291463/xcode-wont-recognize-my-new-provisioning-profile for my app for it to use iphone ios xcode ios provisioning xcode organizer share improve this question tl dr turns out I simply had to edit the project file manually to tell Xcode of the new profile. Now I don't know why I had to manually..
How to disable iOS System Sounds http://stackoverflow.com/questions/6284402/how-to-disable-ios-system-sounds damage equipment. D iphone ios ipad share improve this question It is possible to change the system sounds which turns out to be the ringer btw using the AVSystemController. However AVSystemController exists in the private Celestial framework...
Create a UIImage from two other UIImages on the iPhone http://stackoverflow.com/questions/679245/create-a-uiimage-from-two-other-uiimages-on-the-iphone something like that efficiently with example code iphone uiimage share improve this question For the record this turns out to be fairly straightforward everything you need to know is somewhere in the example below UIImage addStarToThumb UIImage..
Google plus api for posting on wall like facebook http://stackoverflow.com/questions/7857812/google-plus-api-for-posting-on-wall-like-facebook oauth2 Thanks for your help Robin. iphone objective c ios oauth 2.0 google plus share improve this question As it turns out there are only a limited number of api's available for google developers and that also only as GET calls according to..
How to change a particular color in an image? http://stackoverflow.com/questions/8046643/how-to-change-a-particular-color-in-an-image I want to change the color of the lion alone not the background color. For that I referred this SO question but it turns the color of whole image. Moreover the image is not looking great. I need the color change like photoshop. whether it is..
Faster alternative to glReadPixels in iPhone OpenGL ES 2.0 http://stackoverflow.com/questions/9550297/faster-alternative-to-glreadpixels-in-iphone-opengl-es-2-0 this question As of iOS 5.0 there is now a faster way to grab data from OpenGL ES. It isn't readily apparent but it turns out that the texture cache support added in iOS 5.0 doesn't just work for fast upload of camera frames to OpenGL ES but..
Breaking into the debugger on iPhone http://stackoverflow.com/questions/1149113/breaking-into-the-debugger-on-iphone Debugger but that gives me a linker error. Thanks Claus iphone debugging assert share improve this question edit Turns out this also works #define Debugger raise SIGINT I think it's the same principle. I use this #define Debugger kill getpid..
iPhone - Center UIImage in UIImageView http://stackoverflow.com/questions/1428816/iphone-center-uiimage-in-uiimageview to fit. iphone cocoa touch uikit uiview uiimageview share improve this question Sorry for wasting anyone's time. Turns out I didn't try all of the content modes. Seems that Content Mode of Bottom top works. This is backwards from how I understood..
UIScrollView works as expected but scrollRectToVisible: does nothing http://stackoverflow.com/questions/1446536/uiscrollview-works-as-expected-but-scrollrecttovisible-does-nothing figured it out. While the alternative above worked well it has been bugging me and I had to finally figure it out. Turns out that it was somewhat of a stupid mistake. Here's the old code in my viewDidLoad where I set up the scrollView clefScrollView..
XCode - Multiple targets, Multiple *internationalized* names? http://stackoverflow.com/questions/1807377/xcode-multiple-targets-multiple-internationalized-names so I can't replace it dynamically. Any ideas iphone xcode sdk internationalization share improve this question Turns out this is quite easy if laborious. You can have have several InfoPlist.strings one enabled per target and they can each..
iPhone Interface Builder - Moved resources to sub-directory, now IB can't see them! http://stackoverflow.com/questions/1812731/iphone-interface-builder-moved-resources-to-sub-directory-now-ib-cant-see-th how to get the images showing again iphone xcode interface builder xib share improve this question Problem solved Turns out that blue folder references are fine but IB will not read them For anyone else who cares to know if you have the following..
Can't get scrollsToTop working on iOS7 http://stackoverflow.com/questions/19059024/cant-get-scrollstotop-working-on-ios7 is transparent and applies a blur to my collection tableViews as they scroll underneath. Update #3 Figured it out. Turns out I did have more than one scrollView on the screen. My app has a left drawer menu underneath the main part of the app..
How to swizzle a class method on iOS? http://stackoverflow.com/questions/3267506/how-to-swizzle-a-class-method-on-ios origMethod newMethod iphone objective c class methods swizzling share improve this question Turns out I wasn't far away. This implementation works for me void SwizzleClassMethod Class c SEL orig SEL new Method origMethod..
http://stackoverflow.com/questions/3295000/uitabbar-unresponsive-on-ipad actual tabs are tappable. Does anyone have any ideas iphone ipad uitabbarcontroller share improve this question Turns out the automagic option that Apple put into Xcode to convert iPhone projects to universal iPhone iPad projects didn't set..
Circumvent screenshot for iOS 4 http://stackoverflow.com/questions/3350145/circumvent-screenshot-for-ios-4 c ipad ios share improve this question applicationDidEnterBackground does get called before the screenshot. Turns out I was simply hiding my view improperly. A simple way to clear the view was to set the hidden property on my UIViews...
iPod Touch 4G thinks it's an iPad http://stackoverflow.com/questions/4476294/ipod-touch-4g-thinks-its-an-ipad thought the second key would apply to the iPod Touch also as there is no Main nib file base name iPodTouch key. Turns out this is wrong and the iPod Touch actually looks for the Main nib file base name key. So now I have it setup like this..
Reachability network change event not firing http://stackoverflow.com/questions/4501864/reachability-network-change-event-not-firing a better design to start with. iphone objective c reachability nsnotificationcenter share improve this question Turns out it was a memory management issue as I was not retaining the reachability variable so as soon as it would go out of scope..
Crash in ABPeoplePicker when called from another modal viewcontroller and both dismissed http://stackoverflow.com/questions/4856728/crash-in-abpeoplepicker-when-called-from-another-modal-viewcontroller-and-both-d identifier ABMultiValueIdentifier identifier return NO @end iphone abpeoplepickerview share improve this question Turns out this is an actual bug. It is indeed true that if you do a double ModalVC dismiss to ABPeoplePicker when the user clicks..
how do you link directly to app store app update page? http://stackoverflow.com/questions/4904207/how-do-you-link-directly-to-app-store-app-update-page tab that shows all the updates they have available for download. iphone ios hyperlink share improve this question Turns out the phobos links do still work and you can link directly to the update page using this URL format itms apps phobos.apple.com..
Core Data Migration - Can't find mapping model for migration http://stackoverflow.com/questions/5369872/core-data-migration-cant-find-mapping-model-for-migration SVN version of it. Thanks. iphone objective c core data data migration mapping model share improve this question Turns out the Mapping Model needs to be part of the .xcdatamodeld package which is impossible to do within xcode 4. With it in..
Posting attachments with Facebook Graph API using iPhone SDK http://stackoverflow.com/questions/5568642/posting-attachments-with-facebook-graph-api-using-iphone-sdk together with my stream post. I discovered it by taking a look at the html in the actual Facebook Wall page. Turns out the parameters for the POST object are considered the attachment so the only thing to be done is add the properties..
iPhone - Why can the compiler not find some includes when building for ARM architecture? http://stackoverflow.com/questions/5878292/iphone-why-can-the-compiler-not-find-some-includes-when-building-for-arm-archi is a Objective C wrapper for the library you are using. No point reinventing the wheel ADDITIONAL INFORMATION 5 8 11 Turns out the Objective C wrapper is aimed at Mac OS X not iOS Here's what you need to do to get this to compile Get the sources..
What h.264 format loads on android AND IOS? http://stackoverflow.com/questions/6364190/what-h-264-format-loads-on-android-and-ios rather than CABAC entropy encoding CABAC not supported on Android trellis 0 Should be shut off requires CABAC bf 0 Turns off B frames not supported on Android or other h.264 Baseline Profile devices subq 6 Determines what algorithms are used..
jQuery not loading on the iPhone http://stackoverflow.com/questions/792585/jquery-not-loading-on-the-iphone 1.3.2.js and no dice for either. Any ideas jquery iphone uiwebview webkit share improve this question Gah EBCAK Turns out when I copied the jquery javascript source into the project it was copied into the target's Compile Sources which of..
Memory leak drawInRect on iOS5.0.1 http://stackoverflow.com/questions/8236837/memory-leak-drawinrect-on-ios5-0-1 occurred to me that its something about the way its being started from Xcode. Must be a debug setting in the project. Turns out the problem was caused by having NSZombieEnabled while debugging. To disable this setting in Xcode 4 right click on..
Why is object not dealloc'ed when using ARC + NSZombieEnabled http://stackoverflow.com/questions/8408071/why-is-object-not-dealloced-when-using-arc-nszombieenabled may be a bug in XCode. thanks all iphone ios automatic ref counting nszombieenabled share improve this question Turns out I've written some serious nonsense If zombies worked like I originally wrote turning on zombies would directly lead..
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