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2014/10/15 ¤U¤È 10:16:05
iphone Programming Glossary: you'dHow to convert NSArray to NSData? http://stackoverflow.com/questions/1286212/how-to-convert-nsarray-to-nsdata
Use CoreData or SQLite on iPhone? [closed] http://stackoverflow.com/questions/1318467/use-coredata-or-sqlite-on-iphone benefits particularly on the iPhone. Even though it seems counterintuitive given how much overhead you'd think the framework has in most cases you can beat the performance of hand tuned SQLite using Core Data...
OpenGL ES iPhone - drawing anti aliased lines http://stackoverflow.com/questions/1813035/opengl-es-iphone-drawing-anti-aliased-lines ES iPhone drawing anti aliased lines Normally you'd use something like glBlendFunc GL_SRC_ALPHA GL_ONE_MINUS_SRC_ALPHA glEnable GL_BLEND glEnable GL_LINE_SMOOTH..
Is it even possible to change a UIButtons background color? http://stackoverflow.com/questions/2808888/is-it-even-possible-to-change-a-uibuttons-background-color .CGColor loginButton.layer.borderWidth 0.5f loginButton.layer.cornerRadius 10.0f edit ofcourse you'd have to #import QuartzCore QuartzCore.h edit to all new readers you should also consider a few options..
http://stackoverflow.com/questions/412982/iphone-unzip-code usually is used for archives created by WinZip. Those can also be decompressed using zLib but you'd have to parse the header and use other routines. To check have a look at the first two bytes of the..
Lazy load images in UITableViewCell http://stackoverflow.com/questions/531482/lazy-load-images-in-uitableviewcell like the row ID or even the name of the image as the key for each image. When loading a cell you'd send an objectForKey message to the NSMutableDictionary to retrieve the image for that particular cell..
How to distribute ios application wirelessly without managing UDIDs and recompilation http://stackoverflow.com/questions/5546581/how-to-distribute-ios-application-wirelessly-without-managing-udids-and-recompil year and is intended for internal business use. This may work with a normal developer license but you'd have to do some testing to make sure. I imagine the process is the same if it does work. I'm using XCode..
How do I create delegates in Objective-C? http://stackoverflow.com/questions/626898/how-do-i-create-delegates-in-objective-c 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 @implementation..
Understanding reference counting with Cocoa and Objective-C http://stackoverflow.com/questions/6578/understanding-reference-counting-with-cocoa-and-objective-c destroyed. NSString s NSString stringWithString @ Hello World If you want to hang onto that string you'd need to call retain explicitly and then explicitly release it when you're done. Consider the following..
What is the best way to deal with the NSDateFormatter locale “feature”? http://stackoverflow.com/questions/6613110/what-is-the-best-way-to-deal-with-the-nsdateformatter-locale-feature initializer that takes care of assigning the locale and possibly also a format string so you'd have a ready to use formatter right after initializing it. @interface NSDateFormatter LocaleAdditions..
http://stackoverflow.com/questions/8146253/animate-change-of-view-controllers-without-using-navigation-controller-stack-su directly in your app delegate eliminating the need for the TransitionController class. The logic you'd need would be the same however. Use it as follows In your app delegate add a property for the TransitionController..
How to convert NSArray to NSData? http://stackoverflow.com/questions/1286212/how-to-convert-nsarray-to-nsdata
Use CoreData or SQLite on iPhone? [closed] http://stackoverflow.com/questions/1318467/use-coredata-or-sqlite-on-iphone with it. It also provides some very significant performance benefits particularly on the iPhone. Even though it seems counterintuitive given how much overhead you'd think the framework has in most cases you can beat the performance of hand tuned SQLite using Core Data. On the iPhone it does a great job of batching fetches to..
OpenGL ES iPhone - drawing anti aliased lines http://stackoverflow.com/questions/1813035/opengl-es-iphone-drawing-anti-aliased-lines ES iPhone drawing anti aliased lines Normally you'd use something like glBlendFunc GL_SRC_ALPHA GL_ONE_MINUS_SRC_ALPHA glEnable GL_BLEND glEnable GL_LINE_SMOOTH glLineWidth 2.0f glVertexPointer 2 GL_FLOAT 0 points..
Is it even possible to change a UIButtons background color? http://stackoverflow.com/questions/2808888/is-it-even-possible-to-change-a-uibuttons-background-color whiteColor loginButton.layer.borderColor UIColor blackColor .CGColor loginButton.layer.borderWidth 0.5f loginButton.layer.cornerRadius 10.0f edit ofcourse you'd have to #import QuartzCore QuartzCore.h edit to all new readers you should also consider a few options added as another possibility . for you consideration. As..
http://stackoverflow.com/questions/412982/iphone-unzip-code Has sample.zip really been created with gZip The .zip extension usually is used for archives created by WinZip. Those can also be decompressed using zLib but you'd have to parse the header and use other routines. To check have a look at the first two bytes of the file. If it is 'PK' it's WinZip if it's 0x1F8B it's gZip. Because..
Lazy load images in UITableViewCell http://stackoverflow.com/questions/531482/lazy-load-images-in-uitableviewcell storing the images in there. You could use some unique identifier like the row ID or even the name of the image as the key for each image. When loading a cell you'd send an objectForKey message to the NSMutableDictionary to retrieve the image for that particular cell based on your unique key for it . If it returns nil that..
How to distribute ios application wirelessly without managing UDIDs and recompilation http://stackoverflow.com/questions/5546581/how-to-distribute-ios-application-wirelessly-without-managing-udids-and-recompil distributing under the Enterprise license which costs 299 a year and is intended for internal business use. This may work with a normal developer license but you'd have to do some testing to make sure. I imagine the process is the same if it does work. I'm using XCode 4 so this may be slightly different if you're using a different..
How do I create delegates in Objective-C? http://stackoverflow.com/questions/626898/how-do-i-create-delegates-in-objective-c with 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 @implementation MyClass void windowDidMove NSNotification notification..
Understanding reference counting with Cocoa and Objective-C http://stackoverflow.com/questions/6578/understanding-reference-counting-with-cocoa-and-objective-c count of 1 but after the event loop completes it will be destroyed. NSString s NSString stringWithString @ Hello World If you want to hang onto that string you'd need to call retain explicitly and then explicitly release it when you're done. Consider the following very contrived bit of code and you'll see a situation where..
What is the best way to deal with the NSDateFormatter locale “feature”? http://stackoverflow.com/questions/6613110/what-is-the-best-way-to-deal-with-the-nsdateformatter-locale-feature you could create an NSDateFormatter category with an additional initializer that takes care of assigning the locale and possibly also a format string so you'd have a ready to use formatter right after initializing it. @interface NSDateFormatter LocaleAdditions id initWithPOSIXLocaleAndFormat NSString formatString @end..
http://stackoverflow.com/questions/8146253/animate-change-of-view-controllers-without-using-navigation-controller-stack-su you don't want that you could simply implement the same logic directly in your app delegate eliminating the need for the TransitionController class. The logic you'd need would be the same however. Use it as follows In your app delegate add a property for the TransitionController BOOL application UIApplication application didFinishLaunchingWithOptions..
How to convert NSArray to NSData? http://stackoverflow.com/questions/1286212/how-to-convert-nsarray-to-nsdata
Use CoreData or SQLite on iPhone? [closed] http://stackoverflow.com/questions/1318467/use-coredata-or-sqlite-on-iphone performance benefits particularly on the iPhone. Even though it seems counterintuitive given how much overhead you'd think the framework has in most cases you can beat the performance of hand tuned SQLite using Core Data. On the iPhone it..
Multiple UITableViews on one UIView http://stackoverflow.com/questions/1416372/multiple-uitableviews-on-one-uiview
OpenGL ES iPhone - drawing anti aliased lines http://stackoverflow.com/questions/1813035/opengl-es-iphone-drawing-anti-aliased-lines ES iPhone drawing anti aliased lines Normally you'd use something like glBlendFunc GL_SRC_ALPHA GL_ONE_MINUS_SRC_ALPHA glEnable GL_BLEND glEnable GL_LINE_SMOOTH glLineWidth..
Is there a way I can capture my iPhone screen as a video? http://stackoverflow.com/questions/200049/is-there-a-way-i-can-capture-my-iphone-screen-as-a-video
Is it even possible to change a UIButtons background color? http://stackoverflow.com/questions/2808888/is-it-even-possible-to-change-a-uibuttons-background-color UIColor blackColor .CGColor loginButton.layer.borderWidth 0.5f loginButton.layer.cornerRadius 10.0f edit ofcourse you'd have to #import QuartzCore QuartzCore.h edit to all new readers you should also consider a few options added as another..
iPad/iPhone browser crashing when loading images in Javascript http://stackoverflow.com/questions/2986039/ipad-iphone-browser-crashing-when-loading-images-in-javascript the .src .width .height and so on you should never get near the 10MB limit. If you wanted to do a carousel application you'd have to use smaller placeholders first. You might find this technique might be easier to implement. I think I may actually..
http://stackoverflow.com/questions/4119117/restrict-mkmapview-scrolling or zoom inside the overlay's bounds. There aren't built in ways to restrict the map view to the overlay's bounds so you'd have to do it manually. First make sure your MKOverlay object implements the boundingMapRect property. That can then be..
http://stackoverflow.com/questions/412982/iphone-unzip-code gZip The .zip extension usually is used for archives created by WinZip. Those can also be decompressed using zLib but you'd have to parse the header and use other routines. To check have a look at the first two bytes of the file. If it is 'PK'..
Lazy load images in UITableViewCell http://stackoverflow.com/questions/531482/lazy-load-images-in-uitableviewcell some unique identifier like the row ID or even the name of the image as the key for each image. When loading a cell you'd send an objectForKey message to the NSMutableDictionary to retrieve the image for that particular cell based on your unique..
What are the Dangers of Method Swizzling in Objective C? http://stackoverflow.com/questions/5339276/what-are-the-dangers-of-method-swizzling-in-objective-c of method swizzling that is safe to use concurrently 1 . This is actually not a problem in 95 of cases that you'd want to use method swizzling. Usually you simply want to replace the implementation of a method and you want that implementation..
Difference between protocol and delegates? http://stackoverflow.com/questions/5431413/difference-between-protocol-and-delegates should implement. In other words if you want to assign a delegate to a UITextField using the delegate property you'd better make sure that this class conforms to UITextFieldDelegate . In fact because the delegate property of UITextField..
How to distribute ios application wirelessly without managing UDIDs and recompilation http://stackoverflow.com/questions/5546581/how-to-distribute-ios-application-wirelessly-without-managing-udids-and-recompil which costs 299 a year and is intended for internal business use. This may work with a normal developer license but you'd have to do some testing to make sure. I imagine the process is the same if it does work. I'm using XCode 4 so this may be..
How do I create delegates in Objective-C? http://stackoverflow.com/questions/626898/how-do-i-create-delegates-in-objective-c 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 @implementation MyClass void windowDidMove..
Understanding reference counting with Cocoa and Objective-C http://stackoverflow.com/questions/6578/understanding-reference-counting-with-cocoa-and-objective-c it will be destroyed. NSString s NSString stringWithString @ Hello World If you want to hang onto that string you'd need to call retain explicitly and then explicitly release it when you're done. Consider the following very contrived bit..
What is the best way to deal with the NSDateFormatter locale “feature”? http://stackoverflow.com/questions/6613110/what-is-the-best-way-to-deal-with-the-nsdateformatter-locale-feature category with an additional initializer that takes care of assigning the locale and possibly also a format string so you'd have a ready to use formatter right after initializing it. @interface NSDateFormatter LocaleAdditions id initWithPOSIXLocaleAndFormat..
Why am I having to manually set my view's frame in viewDidLoad? http://stackoverflow.com/questions/6757018/why-am-i-having-to-manually-set-my-views-frame-in-viewdidload to do so is in loadView. Since you construct the view yourself in this method you can initialize its frame to whatever you'd like. The size you choose doesn't matter much since UIKit is likely to change it on you anyway. Just make sure you set your..
http://stackoverflow.com/questions/8146253/animate-change-of-view-controllers-without-using-navigation-controller-stack-su the same logic directly in your app delegate eliminating the need for the TransitionController class. The logic you'd need would be the same however. Use it as follows In your app delegate add a property for the TransitionController BOOL..
Set ringtone in iPhone SDK [closed] http://stackoverflow.com/questions/829369/set-ringtone-in-iphone-sdk
http://stackoverflow.com/questions/8482327/learning-opengles-2-0-on-ios
How to change thin image to fat image in iPhone SDK? http://stackoverflow.com/questions/10186200/how-to-change-thin-image-to-fat-image-in-iphone-sdk all the features trace their outlines and then figure out how to transform the image to get a convincing fat effect. You'd need high resolution source images that were posed lit and shot under carefully controlled conditions in order to get good..
How to download audio/video files from internet and store in iPhone app? http://stackoverflow.com/questions/10245345/how-to-download-audio-video-files-from-internet-and-store-in-iphone-app deal of documentation on downloading and storing a file. Take a look at the Downloading a File section on this page. You'd just do something like NSURL url NSURL URLWithString @ http www.fileurl.com example.mp3 ASIHTTPRequest request ASIHTTPRequest..
HTTP Live Streaming, FFMPEG & FFSERVER, and iPhone OS 3 http://stackoverflow.com/questions/1093667/http-live-streaming-ffmpeg-ffserver-and-iphone-os-3 Apple's segmenter. The segmenter spits out segmented video files and M3U playlists pointing to the segmented files. You'd serve the segmented files and playlists via a web server like Apache. Obviously you'll want to tweak the ffmpeg and segmenter..
UILocalizedIndexedCollation for Japanese giving different ordering to contacts/music apps http://stackoverflow.com/questions/11630184/uilocalizedindexedcollation-for-japanese-giving-different-ordering-to-contacts-m
Best way to implement Enums with Core Data http://stackoverflow.com/questions/1624297/best-way-to-implement-enums-with-core-data is the best way of going about this. iphone objective c cocoa cocoa touch core data share improve this question You'd have to create custom accessors if you want to restrict the values to an enum. So first you'd declare an enum like so typedef..
Expand/collapse section in UITableView http://stackoverflow.com/questions/1938921/expand-collapse-section-in-uitableview reloadSections NSIndexSet indexSetWithIndex indexPath.section withRowAnimation UITableViewRowAnimationFade You'd then setup your number numberOfRowsInSection to check the mybooleans value and return either 1 if the section isn't expanded..
How to implement pedometer in iphone? http://stackoverflow.com/questions/1984003/how-to-implement-pedometer-in-iphone pedometer data. The simplest way to do this would be to setup an Accelerometer listener and watch for 'step events'. You'd have to do some experimentation to determine the type and size range of these but that wouldn't be too difficult. share..
How to implement views to the pagecontrol http://stackoverflow.com/questions/2230665/how-to-implement-views-to-the-pagecontrol
iPad/iPhone browser crashing when loading images in Javascript http://stackoverflow.com/questions/2986039/ipad-iphone-browser-crashing-when-loading-images-in-javascript to this. Basically you'll need to do some deeper image management and explicitly shrink any image you don't need. You'd normally do this by using document.removeChild divMyImageContainer or myimagecontainer .empty or what have you but on Mobile..
How do I measure the distance traveled by an iPhone using the accelerometer? http://stackoverflow.com/questions/3707726/how-do-i-measure-the-distance-traveled-by-an-iphone-using-the-accelerometer distance by using the iPhone's accelerometer. Say I want to measure a height of a box using an iPhone application. You'd start the application press a button to start measurement at the bottom of a box move your iPhone from to the top of the..
Pass a variable between lots of UIVIewControllers http://stackoverflow.com/questions/3984702/pass-a-variable-between-lots-of-uiviewcontrollers for example #import UIKit UIKit.h extern NSString myGlobalString @interface MyFirstViewController UIViewController ... You'd then redeclare it in your .m file without the extern. #import MyFirstViewController.h NSString myGlobalString @implementation..
How can i get the name of image picked through photo library in iphone? http://stackoverflow.com/questions/4314405/how-can-i-get-the-name-of-image-picked-through-photo-library-in-iphone it's possible that you could get it from the UIImagePickerControllerReferenceURL object in the info dictionary. You'd need to parse the path and grab the last bit of it. I haven't tried this but it's worth a shot. Added If it works you'd..
How to overwrite a file with NSFileManager when copying? http://stackoverflow.com/questions/6137423/how-to-overwrite-a-file-with-nsfilemanager-when-copying device goes OFF and renaming doesn't happen iphone ios ipad filesystems nsfilemanager share improve this question You'd want to do an atomic save in this case which would be best achieved by using NSData or NSString 's writeToFile atomically..
Blur Effect (Wet in Wet effect) in Paint Application Using OpenGL-ES http://stackoverflow.com/questions/6980402/blur-effect-wet-in-wet-effect-in-paint-application-using-opengl-es buffer but instead of using subpixel offsets you would use multi pixel offsets as big as you want the blur effect. You'd would want to probably render around 16 times to make it look smooth. http www.opengl.org resources code samples advanced..
physical path for application documents directory http://stackoverflow.com/questions/8307265/physical-path-for-application-documents-directory
kCVPixelFormatType_420YpCbCr8BiPlanarFullRange frame to UIImage conversion http://stackoverflow.com/questions/8838481/kcvpixelformattype-420ypcbcr8biplanarfullrange-frame-to-uiimage-conversion
how to make iphone apps like ibeer, imilk, ibug, ibeer http://stackoverflow.com/questions/885152/how-to-make-iphone-apps-like-ibeer-imilk-ibug-ibeer use that technology but it seems like 2d animation would be sufficient. The coin animation seems like a perfect fit. You'd need to create the artwork for any animation frames that aren't the result of rotating or moving an image. Core Animation..
When using GPX in Xcode to simulate location changes, is there a way to control the speed? http://stackoverflow.com/questions/9439495/when-using-gpx-in-xcode-to-simulate-location-changes-is-there-a-way-to-control think know that this is possible in the GPX directly but you can test location change with Instruments Automation. You'd use a script like var target UIATarget.localTarget target.setLocation location target.delay 5 target.setLocation ... And..
switch between uiviews with buttons and not uinavigation controllers http://stackoverflow.com/questions/959023/switch-between-uiviews-with-buttons-and-not-uinavigation-controllers is broken at the view controller's superview likely your window . That is why you are getting a blank screen. You'd likely want to keep a reference around to the original view and then swap it out to the new view by setting the view controller's..
UINavigationController and autorotation http://stackoverflow.com/questions/970482/uinavigationcontroller-and-autorotation that allows it. You would manually handle the transition to and from the root controller and the child controller. You'd have to patch up the child navigation controller to have the correct back button. And of course you'd have to handle the..
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