2014/10/15 下午 10:07:15
iphone Programming Glossary: docsRetrieving a pixel alpha value for a UIImage http://stackoverflow.com/questions/1042830/retrieving-a-pixel-alpha-value-for-a-uiimage question Yes CGContexts have their y axis pointing up while in UIKit it points down. See the docs . Edit after reading code You also want to set the blend mode to replace before drawing the image since..
MKPinAnnotationView: Are there more than three colors available? http://stackoverflow.com/questions/1185611/mkpinannotationview-are-there-more-than-three-colors-available Are there more than three colors available According to the Apple docs MKPinAnnotationView's pin color is available in red green and purple. Is there any way to get other.. in red green and purple. Is there any way to get other colors also I've found nothing in the docs. iphone cocoa touch mapkit mkpinannotationview share improve this question You might find the following..
Add UIPickerView & a Button in Action sheet - How? http://stackoverflow.com/questions/1262574/add-uipickerview-a-button-in-action-sheet-how can be implemented iphone uipickerview share improve this question Update for iOS 7 Apple docs for UIActionSheet UIActionSheet is not designed to be subclassed nor should you add views to its hierarchy..
“wait_fences: failed to receive reply: 10004003”? http://stackoverflow.com/questions/1371346/wait-fences-failed-to-receive-reply-10004003 . You should not perform animations when you are not on screen will appear . And the viewDidAppear docs explain that you must call super because they have their own things to do. share improve this answer..
How to get the RGB values for a pixel on an image on the iphone http://stackoverflow.com/questions/144250/how-to-get-the-rgb-values-for-a-pixel-on-an-image-on-the-iphone bitmap to return the bitmap pixel data Get the bitmap data from the receiver's CGImage see UIImage docs self setBitmapData CGDataProviderCopyData CGImageGetDataProvider self CGImage Create a buffer to store..
Objective-C categories in static library http://stackoverflow.com/questions/2567498/objective-c-categories-in-static-library ' force_load' are no longer needed. Details I found some answers on various forums blogs and apple docs. Now I try make short summary of my searches and experiments. Problem was caused by citation from apple..
Popover with embedded navigation controller doesn't respect size on back nav http://stackoverflow.com/questions/2752394/popover-with-embedded-navigation-controller-doesnt-respect-size-on-back-nav a UINavigationController which contains a small hierarchy of view controllers. I followed the docs and for each view controller I set the view's popover context size like so self setContentSizeForViewInPopover..
How to parsing JSON object in iPhone SDK (XCode) using JSON-Framework http://stackoverflow.com/questions/3165290/how-to-parsing-json-object-in-iphone-sdk-xcode-using-json-framework the instructions to install JSON Framework into your project here's how you use it taken from the docs here Parse the string into JSON NSDictionary json myString JSONValue Get the objects you want e.g. output..
Setting direction for UISwipeGestureRecognizer http://stackoverflow.com/questions/3319209/setting-direction-for-uiswipegesturerecognizer project. Gestures in all directions right down left up should be recognized. It is stated in the docs for UISwipeGestureRecognizer You may specify multiple directions by specifying multiple UISwipeGestureRecognizerDirection.. adding four recognizers to the view but I'm curious to know why didn't it work as advertised in docs void viewDidLoad UISwipeGestureRecognizer recognizer recognizer UISwipeGestureRecognizer alloc initWithTarget..
display image from URL retrieved from ALAsset in iPhone http://stackoverflow.com/questions/3837115/display-image-from-url-retrieved-from-alasset-in-iphone ext JPG You use the ALAssetLibrary object to access the ALAsset object via the URL. so from the docs for ALAssetLibrary throw this in a header or your source typedef void ^ALAssetsLibraryAssetForURLResultBlock..
Lock-down iPhone/iPod/iPad so it can only run one app http://stackoverflow.com/questions/5011774/lock-down-iphone-ipod-ipad-so-it-can-only-run-one-app 7 now includes an 'App Lock' payload as part of the device configuration profile. From the Apple docs By installing an app lock payload the device is locked to a single application until the payload is..
Has anyone implemented the PayPal API through a native iPhone app? http://stackoverflow.com/questions/779423/has-anyone-implemented-the-paypal-api-through-a-native-iphone-app
iCloud basics and code sample [closed] http://stackoverflow.com/questions/7795629/icloud-basics-and-code-sample detailed on the developer forum there is one for iCloud and CoreData which is massive . The apple docs are OK but I still can't see the big picture. So please bear with me some of these questions are quite.. iphone objective c ios cocoa touch icloud share improve this question I just re read the docs and it appears that my general approach is wrong. I should first create the file in the sandbox and.. parties are notified of the changes you make. However if you dig a little deeper into the docs concerning setUbiquitous you'll find Use this method to move a file from its current location to iCloud...
Google plus api for posting on wall like facebook http://stackoverflow.com/questions/7857812/google-plus-api-for-posting-on-wall-like-facebook some text on google plus. But it seems like there are none. I have also tried to go through the docs provided by google for developers of mac and iphone but can't find anything that will solve my problem... have a little bit of information on the above matters I am seemed to be lost. Here is a list of docs that I had went through. http code.google.com p google api objectivec client wiki Introduction http..
Reading HTML content from a UIWebView http://stackoverflow.com/questions/992348/reading-html-content-from-a-uiwebview Javascript found in the page you load the method name loadHTMLString is somewhat ambiguous and the docs don't say much about it . For more info UIWebView class reference NSString class reference NSURL class..
Retrieving a pixel alpha value for a UIImage http://stackoverflow.com/questions/1042830/retrieving-a-pixel-alpha-value-for-a-uiimage iphone uikit core graphics quartz graphics share improve this question Yes CGContexts have their y axis pointing up while in UIKit it points down. See the docs . Edit after reading code You also want to set the blend mode to replace before drawing the image since you want the image's alpha value not the one which was in..
MKPinAnnotationView: Are there more than three colors available? http://stackoverflow.com/questions/1185611/mkpinannotationview-are-there-more-than-three-colors-available Are there more than three colors available According to the Apple docs MKPinAnnotationView's pin color is available in red green and purple. Is there any way to get other colors also I've found nothing in the docs. iphone cocoa touch.. to the Apple docs MKPinAnnotationView's pin color is available in red green and purple. Is there any way to get other colors also I've found nothing in the docs. iphone cocoa touch mapkit mkpinannotationview share improve this question You might find the following images useful and the code to use them in viewForAnnotation..
Add UIPickerView & a Button in Action sheet - How? http://stackoverflow.com/questions/1262574/add-uipickerview-a-button-in-action-sheet-how understand my requirements. Could you please explain how this can be implemented iphone uipickerview share improve this question Update for iOS 7 Apple docs for UIActionSheet UIActionSheet is not designed to be subclassed nor should you add views to its hierarchy I recommend against trying to customize the contents..
“wait_fences: failed to receive reply: 10004003”? http://stackoverflow.com/questions/1371346/wait-fences-failed-to-receive-reply-10004003
How to get the RGB values for a pixel on an image on the iphone http://stackoverflow.com/questions/144250/how-to-get-the-rgb-values-for-a-pixel-on-an-image-on-the-iphone pixelData Step 4. Subclass code I put in a method named bitmap to return the bitmap pixel data Get the bitmap data from the receiver's CGImage see UIImage docs self setBitmapData CGDataProviderCopyData CGImageGetDataProvider self CGImage Create a buffer to store bitmap data unitialized memory as long as the data self setPixelBitData..
Objective-C categories in static library http://stackoverflow.com/questions/2567498/objective-c-categories-in-static-library Flags click the button and add ' ObjC'. ' all_load' and ' force_load' are no longer needed. Details I found some answers on various forums blogs and apple docs. Now I try make short summary of my searches and experiments. Problem was caused by citation from apple Technical Q A QA1490 http developer.apple.com mac library..
Popover with embedded navigation controller doesn't respect size on back nav http://stackoverflow.com/questions/2752394/popover-with-embedded-navigation-controller-doesnt-respect-size-on-back-nav respect size on back nav I have a UIPopoverController hosting a UINavigationController which contains a small hierarchy of view controllers. I followed the docs and for each view controller I set the view's popover context size like so self setContentSizeForViewInPopover CGSizeMake 320 500 size different for each controller..
How to parsing JSON object in iPhone SDK (XCode) using JSON-Framework http://stackoverflow.com/questions/3165290/how-to-parsing-json-object-in-iphone-sdk-xcode-using-json-framework share improve this question Assuming you've followed the instructions to install JSON Framework into your project here's how you use it taken from the docs here Parse the string into JSON NSDictionary json myString JSONValue Get the objects you want e.g. output the second item's client id NSArray items json valueForKeyPath..
Setting direction for UISwipeGestureRecognizer http://stackoverflow.com/questions/3319209/setting-direction-for-uiswipegesturerecognizer add simple swipe gesture recognition to my view based iPhone project. Gestures in all directions right down left up should be recognized. It is stated in the docs for UISwipeGestureRecognizer You may specify multiple directions by specifying multiple UISwipeGestureRecognizerDirection constants using bitwise OR operands. The.. recognizer NSLog @ Swipe received. I fixed this with adding four recognizers to the view but I'm curious to know why didn't it work as advertised in docs void viewDidLoad UISwipeGestureRecognizer recognizer recognizer UISwipeGestureRecognizer alloc initWithTarget self action @selector handleSwipeFrom recognizer setDirection..
display image from URL retrieved from ALAsset in iPhone http://stackoverflow.com/questions/3837115/display-image-from-url-retrieved-from-alasset-in-iphone URL's like this. assets library asset asset.JPG id 1000000003 ext JPG You use the ALAssetLibrary object to access the ALAsset object via the URL. so from the docs for ALAssetLibrary throw this in a header or your source typedef void ^ALAssetsLibraryAssetForURLResultBlock ALAsset asset typedef void ^ALAssetsLibraryAccessFailureBlock..
Lock-down iPhone/iPod/iPad so it can only run one app http://stackoverflow.com/questions/5011774/lock-down-iphone-ipod-ipad-so-it-can-only-run-one-app ago would have saved us a bit of hassle EDIT EDIT EDIT iOS 7 now includes an 'App Lock' payload as part of the device configuration profile. From the Apple docs By installing an app lock payload the device is locked to a single application until the payload is removed. The home button is disabled and the device returns..
Has anyone implemented the PayPal API through a native iPhone app? http://stackoverflow.com/questions/779423/has-anyone-implemented-the-paypal-api-through-a-native-iphone-app
iCloud basics and code sample [closed] http://stackoverflow.com/questions/7795629/icloud-basics-and-code-sample iCloud. There are some samples but they are usually quite detailed on the developer forum there is one for iCloud and CoreData which is massive . The apple docs are OK but I still can't see the big picture. So please bear with me some of these questions are quite fundamental but possibly easy to answer. Context I have a.. _document updateChangeCount UIDocumentChangeDone iphone objective c ios cocoa touch icloud share improve this question I just re read the docs and it appears that my general approach is wrong. I should first create the file in the sandbox and then move it to the cloud. In other words Apple seems to suggest.. file or directory at the same time and ensures that other interested parties are notified of the changes you make. However if you dig a little deeper into the docs concerning setUbiquitous you'll find Use this method to move a file from its current location to iCloud. For files located in an application 䏭 sandbox this involves..
Google plus api for posting on wall like facebook http://stackoverflow.com/questions/7857812/google-plus-api-for-posting-on-wall-like-facebook I have been searching for tutorials on google for posting some text on google plus. But it seems like there are none. I have also tried to go through the docs provided by google for developers of mac and iphone but can't find anything that will solve my problem. ALso there are little information on how to get the user.. or use UIWebView like foursquare for user login. Does anyone have a little bit of information on the above matters I am seemed to be lost. Here is a list of docs that I had went through. http code.google.com p google api objectivec client wiki Introduction http code.google.com p google api objectivec client wiki BuildingTheLibrary..
Reading HTML content from a UIWebView http://stackoverflow.com/questions/992348/reading-html-content-from-a-uiwebview
Retrieving a pixel alpha value for a UIImage http://stackoverflow.com/questions/1042830/retrieving-a-pixel-alpha-value-for-a-uiimage share improve this question Yes CGContexts have their y axis pointing up while in UIKit it points down. See the docs . Edit after reading code You also want to set the blend mode to replace before drawing the image since you want the image's..
MKPinAnnotationView: Are there more than three colors available? http://stackoverflow.com/questions/1185611/mkpinannotationview-are-there-more-than-three-colors-available Are there more than three colors available According to the Apple docs MKPinAnnotationView's pin color is available in red green and purple. Is there any way to get other colors also I've found.. pin color is available in red green and purple. Is there any way to get other colors also I've found nothing in the docs. iphone cocoa touch mapkit mkpinannotationview share improve this question You might find the following images useful..
Add UIPickerView & a Button in Action sheet - How? http://stackoverflow.com/questions/1262574/add-uipickerview-a-button-in-action-sheet-how please explain how this can be implemented iphone uipickerview share improve this question Update for iOS 7 Apple docs for UIActionSheet UIActionSheet is not designed to be subclassed nor should you add views to its hierarchy I recommend against..
“wait_fences: failed to receive reply: 10004003”? http://stackoverflow.com/questions/1371346/wait-fences-failed-to-receive-reply-10004003
How to get the RGB values for a pixel on an image on the iphone http://stackoverflow.com/questions/144250/how-to-get-the-rgb-values-for-a-pixel-on-an-image-on-the-iphone in a method named bitmap to return the bitmap pixel data Get the bitmap data from the receiver's CGImage see UIImage docs self setBitmapData CGDataProviderCopyData CGImageGetDataProvider self CGImage Create a buffer to store bitmap data unitialized..
Objective-C categories in static library http://stackoverflow.com/questions/2567498/objective-c-categories-in-static-library ' all_load' and ' force_load' are no longer needed. Details I found some answers on various forums blogs and apple docs. Now I try make short summary of my searches and experiments. Problem was caused by citation from apple Technical Q A QA1490..
Popover with embedded navigation controller doesn't respect size on back nav http://stackoverflow.com/questions/2752394/popover-with-embedded-navigation-controller-doesnt-respect-size-on-back-nav hosting a UINavigationController which contains a small hierarchy of view controllers. I followed the docs and for each view controller I set the view's popover context size like so self setContentSizeForViewInPopover CGSizeMake..
How to parsing JSON object in iPhone SDK (XCode) using JSON-Framework http://stackoverflow.com/questions/3165290/how-to-parsing-json-object-in-iphone-sdk-xcode-using-json-framework you've followed the instructions to install JSON Framework into your project here's how you use it taken from the docs here Parse the string into JSON NSDictionary json myString JSONValue Get the objects you want e.g. output the second item's..
Setting direction for UISwipeGestureRecognizer http://stackoverflow.com/questions/3319209/setting-direction-for-uiswipegesturerecognizer my view based iPhone project. Gestures in all directions right down left up should be recognized. It is stated in the docs for UISwipeGestureRecognizer You may specify multiple directions by specifying multiple UISwipeGestureRecognizerDirection.. I fixed this with adding four recognizers to the view but I'm curious to know why didn't it work as advertised in docs void viewDidLoad UISwipeGestureRecognizer recognizer recognizer UISwipeGestureRecognizer alloc initWithTarget self action..
display image from URL retrieved from ALAsset in iPhone http://stackoverflow.com/questions/3837115/display-image-from-url-retrieved-from-alasset-in-iphone id 1000000003 ext JPG You use the ALAssetLibrary object to access the ALAsset object via the URL. so from the docs for ALAssetLibrary throw this in a header or your source typedef void ^ALAssetsLibraryAssetForURLResultBlock ALAsset asset..
Lock-down iPhone/iPod/iPad so it can only run one app http://stackoverflow.com/questions/5011774/lock-down-iphone-ipod-ipad-so-it-can-only-run-one-app EDIT EDIT EDIT iOS 7 now includes an 'App Lock' payload as part of the device configuration profile. From the Apple docs By installing an app lock payload the device is locked to a single application until the payload is removed. The home button..
Has anyone implemented the PayPal API through a native iPhone app? http://stackoverflow.com/questions/779423/has-anyone-implemented-the-paypal-api-through-a-native-iphone-app
iCloud basics and code sample [closed] http://stackoverflow.com/questions/7795629/icloud-basics-and-code-sample are usually quite detailed on the developer forum there is one for iCloud and CoreData which is massive . The apple docs are OK but I still can't see the big picture. So please bear with me some of these questions are quite fundamental but possibly.. UIDocumentChangeDone iphone objective c ios cocoa touch icloud share improve this question I just re read the docs and it appears that my general approach is wrong. I should first create the file in the sandbox and then move it to the.. that other interested parties are notified of the changes you make. However if you dig a little deeper into the docs concerning setUbiquitous you'll find Use this method to move a file from its current location to iCloud. For files located..
Google plus api for posting on wall like facebook http://stackoverflow.com/questions/7857812/google-plus-api-for-posting-on-wall-like-facebook on google for posting some text on google plus. But it seems like there are none. I have also tried to go through the docs provided by google for developers of mac and iphone but can't find anything that will solve my problem. ALso there are little.. login. Does anyone have a little bit of information on the above matters I am seemed to be lost. Here is a list of docs that I had went through. http code.google.com p google api objectivec client wiki Introduction http code.google.com p google..
Reading HTML content from a UIWebView http://stackoverflow.com/questions/992348/reading-html-content-from-a-uiwebview if this will run Javascript found in the page you load the method name loadHTMLString is somewhat ambiguous and the docs don't say much about it . For more info UIWebView class reference NSString class reference NSURL class reference share..
iPhone: How to draw line between two points on MapKit? http://stackoverflow.com/questions/10598322/iphone-how-to-draw-line-between-two-points-on-mapkit or route in mkmapview 1 Draw route using mapkit 2 From versions above ios4.0 You can use MKOverlayPathView See Apple Docs Sample code create PolyLine void loadRoute NSString filePath NSBundle mainBundle pathForResource @ 𩼣oute ofType @ 𩓧sv 㷷..
iPhone viewWillAppear not firing http://stackoverflow.com/questions/131062/iphone-viewwillappear-not-firing of a complex programmatic view heirarchy that successfully recieves viewWillAppear events at every level Apple's Docs state Warning If the view belonging to a view controller is added to a view hierarchy directly the view controller will..
How do you interpret dates with NSDateFormatter? http://stackoverflow.com/questions/1559182/how-do-you-interpret-dates-with-nsdateformatter do you interpret dates with NSDateFormatter In the Apple Docs they say that NSDateFormatter uses the Unicode for spec. I've read the spec but I'm having troubles interpreting this date..
Changing the text on a UISwitch http://stackoverflow.com/questions/2711180/changing-the-text-on-a-uiswitch As of iOS 6 you can set @property nonatomic retain UIImage offImage @property nonatomic retain UIImage onImage Docs say This image represents the interior contents of the switch. The image you specify is composited with the switch 䏭 rounded..
How to make half curl animation in iPhone like the maps app? http://stackoverflow.com/questions/2863049/how-to-make-half-curl-animation-in-iphone-like-the-maps-app
Basic description on how to record video in iOs 4 http://stackoverflow.com/questions/3173822/basic-description-on-how-to-record-video-in-ios-4
http://stackoverflow.com/questions/3220695/nstimer-problem iphone xcode share improve this question Ok well for starters check this out if you haven't already Official Apple Docs about Using Timers Based on your description you probably want code that looks something like this. I've made some assumptions..
Any way to bottom-align UILabels with dissimilar fonts? http://stackoverflow.com/questions/4542473/any-way-to-bottom-align-uilabels-with-dissimilar-fonts uilabel share improve this question You may want to take a look at this page . There is information on Apple's Docs however this was the first I found. So it looks like you'll have to do some calculation based on the descender of the UIFont..
Game Center - Sending and receiving data http://stackoverflow.com/questions/4574119/game-center-sending-and-receiving-data Game Center multiplayer in my iphone game and having trouble understanding the samples I have at hand in the Apple Docs and from third parties concerning sending and receiving data. Could someone please explain the code samples in the Official..
iOS: Using device modifiers for loading xib files? http://stackoverflow.com/questions/5191472/ios-using-device-modifiers-for-loading-xib-files for iPhone and Default~ipad.png for iPad for example . Those two things are specifically mentioned in Apple Docs but they don't say that this will work for any other kinds of files. I've discovered quite by accident that this works for..
How do I create delegates in Objective-C? http://stackoverflow.com/questions/626898/how-do-i-create-delegates-in-objective-c own delegates you'll have to declare their methods somewhere. There are two basic approaches discussed in the Apple Docs on protocols 1 An Informal Protocol This can be done as NSWindow does in a category on NSObject. For example continuing..
how to impliment payment-gateway with iphone application? http://stackoverflow.com/questions/6689019/how-to-impliment-payment-gateway-with-iphone-application takes some of money for themselves. Refer http troybrant.net blog 2010 01 in app purchases a full walkthrough Apple Docs http developer.apple.com library ios #documentation NetworkingInternet Conceptual StoreKitGuide Introduction Introduction.html..
Keyboard Scroll on Active Text Field - Scrolling to Out of View? http://stackoverflow.com/questions/7193787/keyboard-scroll-on-active-text-field-scrolling-to-out-of-view fields are visible . Does anyone know what that problem could be caused by I'm placing the code in here from the Apple Docs so you can see exactly what code I'm using without having to click away. my .h IBOutlet UIScrollView scrollView IBOutlet..
How to download docx , pdf , image , pptx , or any file from a internet http://stackoverflow.com/questions/7420837/how-to-download-docx-pdf-image-pptx-or-any-file-from-a-internet alloc initWithString mydelegate getPassword NSLog @ In Downloading NSURL url NSURL URLWithString @ http abcdef.xyz.com Docs NewFolder myFile.docx stringByAddingPercentEscapesUsingEncoding NSUTF8StringEncoding NSMutableURLRequest req NSMutableURLRequest..
http://stackoverflow.com/questions/8057019/iclouds-loadfromcontents-how-to-deal-with-uidocumentstatesavingerror-uidocu why didn't Apple suggest in their sample code to check the documentState before loading data into UIDocument iCloud Docs I guess that I'm doing something fundamentally wrong. iphone objective c cocoa touch ios5 icloud share improve this question..
Sound stop playing [duplicate] http://stackoverflow.com/questions/8094557/sound-stop-playing
iPhone - Sound overlapping with multiple button presses http://stackoverflow.com/questions/8101870/iphone-sound-overlapping-with-multiple-button-presses
What does the property “Nonatomic” mean? http://stackoverflow.com/questions/821692/what-does-the-property-nonatomic-mean and nonatomic Thanks iphone objective c cocoa properties share improve this question Take a look at the Apple Docs . Basically if you say nonatomic and you generate the accessors using @synthesize then if multiple threads try to change..
How can I rotate an UIImageView by 20 degrees? http://stackoverflow.com/questions/852863/how-can-i-rotate-an-uiimageview-by-20-degrees do I have to do if I need to rotate an UIImageView I have an image which I want to rotate by 20 degrees. The Apple Docs talk about an transformation Matrix but that sounds incredible difficult. Are there any helpful methods or functions to..
Provide Base Data for Core Data Application? http://stackoverflow.com/questions/928177/provide-base-data-for-core-data-application persistent store. I created a Mac app that populates a store. It is copied into my bundle and at start copied to the Docs directory. This works fine. I am told the Core Data Books example was developed the same way. Please note this doesn't mean..
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