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2014/10/15 ¤U¤È 10:08:36
iphone Programming Glossary: existsHow to check for an active Internet Connection on iPhone SDK? http://stackoverflow.com/questions/1083701/how-to-check-for-an-active-internet-connection-on-iphone-sdk internetReachable startNotifier check if a pathway to a random host exists hostReachable Reachability reachabilityWithHostName @ www.apple.com hostReachable startNotifier now..
Is it possible to register a http+domain-based URL Scheme for iPhone apps, like YouTube and Maps? http://stackoverflow.com/questions/1108693/is-it-possible-to-register-a-httpdomain-based-url-scheme-for-iphone-apps-like if the user agent is that of an iPhone iPod Touch Check for an appInstalled cookie If the cookie exists and is set to true set window.location to your uri or do the redirect server side If the cookie doesn't..
Is there a good tutorial for implementing an augmented reality iPhone application? [closed] http://stackoverflow.com/questions/2084327/is-there-a-good-tutorial-for-implementing-an-augmented-reality-iphone-applicatio iphone camera augmented reality share improve this question I doubt exactly such a thing exists but what you need to do is look at the location and camera frameworks for the iPhone and go from there...
http://stackoverflow.com/questions/2496554/easiest-way-to-support-multiple-orientations-how-do-i-load-a-custom-nib-when-th that I want to use myViewController.xib and myViewControllerLandscape.xib. myViewController.xib exists in project Resources and myViewControllerLandscape.xib exists in the root project directory. What I.. myViewController.xib exists in project Resources and myViewControllerLandscape.xib exists in the root project directory. What I want to do is use a separate NIB myViewControllerLandscape.xib..
http://stackoverflow.com/questions/3504173/detect-retina-display .scale property is equal to 2.0. You CANNOT assume a device is running iOS4 if the scale property exists as the iPad 3.2 also contains this property. On an iPad running iOS3.2 scale will return 1.0 in 1x mode.. in the simulator. I test for the displayLinkWithTarget selector method on the main screen which exists in iOS4.x but not iOS3.2 and then check the screen's scale if UIScreen mainScreen respondsToSelector..
Do you need to create an NSAutoreleasePool within a block in GCD? http://stackoverflow.com/questions/4141123/do-you-need-to-create-an-nsautoreleasepool-within-a-block-in-gcd NSOperationQueue you need to create an NSAutoreleasePool for that thread or operation because none exists by default. Does the same rule apply to a block that is placed within a Grand Central Dispatch queue..
iOS SDK - Programmatically generate a PDF file http://stackoverflow.com/questions/4362734/ios-sdk-programmatically-generate-a-pdf-file is a bug with CoreGraphics PDF generation in iOS that results in corrupted PDFs. I know this issue exists up to and including iOS 4.1 I haven't tested iOS 4.2 . The issue is related to fonts and only shows..
How do I set up a simple delegate to communicate between two view controllers? http://stackoverflow.com/questions/6168919/how-do-i-set-up-a-simple-delegate-to-communicate-between-two-view-controllers of ChildViewControllerDelegate this just declares that a ChildViewControllerDelegate type exists so that we can use it later. @protocol ChildViewControllerDelegate 2. Declaration of the view controller..
performSelector may cause a leak because its selector is unknown http://stackoverflow.com/questions/7017281/performselector-may-cause-a-leak-because-its-selector-is-unknown @ someMethod Why do I get this warning I understand the compiler can't check if the selector exists or not but why would that cause a leak And how can I change my code so that I don't get this warning..
iCloud basics and code sample [closed] http://stackoverflow.com/questions/7795629/icloud-basics-and-code-sample object query _query nil we're done with it void loadDocument 2 iCloud query Looks if there exists a file called text.txt in the cloud NSMetadataQuery query NSMetadataQuery alloc init _query query SCOPE..
MKMapView: Instead of Annotation Pin, a custom view http://stackoverflow.com/questions/9814988/mkmapview-instead-of-annotation-pin-a-custom-view @ I am here return pinView Notice that animatesDrop is also commented out since that property only exists in MKPinAnnotationView . If you still want your image annotations to drop you'll have to do the animation..
How to check for an active Internet Connection on iPhone SDK? http://stackoverflow.com/questions/1083701/how-to-check-for-an-active-internet-connection-on-iphone-sdk object nil internetReachable Reachability reachabilityForInternetConnection internetReachable startNotifier check if a pathway to a random host exists hostReachable Reachability reachabilityWithHostName @ www.apple.com hostReachable startNotifier now patiently wait for the notification 8 Set up the method for..
Is it possible to register a http+domain-based URL Scheme for iPhone apps, like YouTube and Maps? http://stackoverflow.com/questions/1108693/is-it-possible-to-register-a-httpdomain-based-url-scheme-for-iphone-apps-like the least intrusive way of doing this is as follows Check if the user agent is that of an iPhone iPod Touch Check for an appInstalled cookie If the cookie exists and is set to true set window.location to your uri or do the redirect server side If the cookie doesn't exist open a Did you know Your Site Name has an iPhone application..
Is there a good tutorial for implementing an augmented reality iPhone application? [closed] http://stackoverflow.com/questions/2084327/is-there-a-good-tutorial-for-implementing-an-augmented-reality-iphone-applicatio demonstrate how to make an augmented reality iPhone application iphone camera augmented reality share improve this question I doubt exactly such a thing exists but what you need to do is look at the location and camera frameworks for the iPhone and go from there. Basically you will create a UIImagePickerController the..
http://stackoverflow.com/questions/2496554/easiest-way-to-support-multiple-orientations-how-do-i-load-a-custom-nib-when-th like to support multiple orientations. I have two .xib files that I want to use myViewController.xib and myViewControllerLandscape.xib. myViewController.xib exists in project Resources and myViewControllerLandscape.xib exists in the root project directory. What I want to do is use a separate NIB myViewControllerLandscape.xib.. that I want to use myViewController.xib and myViewControllerLandscape.xib. myViewController.xib exists in project Resources and myViewControllerLandscape.xib exists in the root project directory. What I want to do is use a separate NIB myViewControllerLandscape.xib for my rotations. I try detecting rotation in viewDidLoad l..
http://stackoverflow.com/questions/3504173/detect-retina-display if the device is running iOS4 and if the UIScreen mainScreen .scale property is equal to 2.0. You CANNOT assume a device is running iOS4 if the scale property exists as the iPad 3.2 also contains this property. On an iPad running iOS3.2 scale will return 1.0 in 1x mode and 2.0 in 2x mode even though we know that device does.. 1.0 in both 1x and 2x modes. You can test this yourself in the simulator. I test for the displayLinkWithTarget selector method on the main screen which exists in iOS4.x but not iOS3.2 and then check the screen's scale if UIScreen mainScreen respondsToSelector @selector displayLinkWithTarget selector UIScreen mainScreen..
Do you need to create an NSAutoreleasePool within a block in GCD? http://stackoverflow.com/questions/4141123/do-you-need-to-create-an-nsautoreleasepool-within-a-block-in-gcd you spawn a background thread or run an NSOperation on an NSOperationQueue you need to create an NSAutoreleasePool for that thread or operation because none exists by default. Does the same rule apply to a block that is placed within a Grand Central Dispatch queue and will be run on a non main thread That is do you need to..
iOS SDK - Programmatically generate a PDF file http://stackoverflow.com/questions/4362734/ios-sdk-programmatically-generate-a-pdf-file improve this question A couple things... First there is a bug with CoreGraphics PDF generation in iOS that results in corrupted PDFs. I know this issue exists up to and including iOS 4.1 I haven't tested iOS 4.2 . The issue is related to fonts and only shows up if you include text in your PDF. The symptom is that when..
How do I set up a simple delegate to communicate between two view controllers? http://stackoverflow.com/questions/6168919/how-do-i-set-up-a-simple-delegate-to-communicate-between-two-view-controllers ChildViewController.h #import UIKit UIKit.h 1. Forward declaration of ChildViewControllerDelegate this just declares that a ChildViewControllerDelegate type exists so that we can use it later. @protocol ChildViewControllerDelegate 2. Declaration of the view controller class as usual @interface ChildViewController UIViewController..
performSelector may cause a leak because its selector is unknown http://stackoverflow.com/questions/7017281/performselector-may-cause-a-leak-because-its-selector-is-unknown what I'm doing _controller performSelector NSSelectorFromString @ someMethod Why do I get this warning I understand the compiler can't check if the selector exists or not but why would that cause a leak And how can I change my code so that I don't get this warning anymore iphone objective c ios automatic ref counting share..
iCloud basics and code sample [closed] http://stackoverflow.com/questions/7795629/icloud-basics-and-code-sample self name NSMetadataQueryDidFinishGatheringNotification object query _query nil we're done with it void loadDocument 2 iCloud query Looks if there exists a file called text.txt in the cloud NSMetadataQuery query NSMetadataQuery alloc init _query query SCOPE query setSearchScopes NSArray arrayWithObject NSMetadataQueryUbiquitousDocumentsScope..
MKMapView: Instead of Annotation Pin, a custom view http://stackoverflow.com/questions/9814988/mkmapview-instead-of-annotation-pin-a-custom-view as suggested by Squatch else mapView.userLocation setTitle @ I am here return pinView Notice that animatesDrop is also commented out since that property only exists in MKPinAnnotationView . If you still want your image annotations to drop you'll have to do the animation yourself. You can search Stack Overflow for animatesdrop..
What do I have to do to get Core Data to automatically migrate models? http://stackoverflow.com/questions/1018155/what-do-i-have-to-do-to-get-core-data-to-automatically-migrate-models reality of implementing it. As I understand it the application should notice that the model it has and the model that exists on a device already are not the same. If you have only added attributes or relationships and similar simple changes then..
How to check for an active Internet Connection on iPhone SDK? http://stackoverflow.com/questions/1083701/how-to-check-for-an-active-internet-connection-on-iphone-sdk Reachability reachabilityForInternetConnection internetReachable startNotifier check if a pathway to a random host exists hostReachable Reachability reachabilityWithHostName @ www.apple.com hostReachable startNotifier now patiently wait for the..
Is it possible to register a http+domain-based URL Scheme for iPhone apps, like YouTube and Maps? http://stackoverflow.com/questions/1108693/is-it-possible-to-register-a-httpdomain-based-url-scheme-for-iphone-apps-like is as follows Check if the user agent is that of an iPhone iPod Touch Check for an appInstalled cookie If the cookie exists and is set to true set window.location to your uri or do the redirect server side If the cookie doesn't exist open a Did..
Is there a good tutorial for implementing an augmented reality iPhone application? [closed] http://stackoverflow.com/questions/2084327/is-there-a-good-tutorial-for-implementing-an-augmented-reality-iphone-applicatio iPhone application iphone camera augmented reality share improve this question I doubt exactly such a thing exists but what you need to do is look at the location and camera frameworks for the iPhone and go from there. Basically you will..
http://stackoverflow.com/questions/2496554/easiest-way-to-support-multiple-orientations-how-do-i-load-a-custom-nib-when-th I have two .xib files that I want to use myViewController.xib and myViewControllerLandscape.xib. myViewController.xib exists in project Resources and myViewControllerLandscape.xib exists in the root project directory. What I want to do is use a.. and myViewControllerLandscape.xib. myViewController.xib exists in project Resources and myViewControllerLandscape.xib exists in the root project directory. What I want to do is use a separate NIB myViewControllerLandscape.xib for my rotations. I..
Accordion table cell - How to dynamically expand/contract uitableviewcell? http://stackoverflow.com/questions/3066167/accordion-table-cell-how-to-dynamically-expand-contract-uitableviewcell CGFloat tableView UITableView tableView heightForRowAtIndexPath NSIndexPath indexPath check if the index actually exists if selectedRowIndex indexPath.row selectedRowIndex.row return 100 return 44 This will return height 100 for the selected..
http://stackoverflow.com/questions/3504173/detect-retina-display UIScreen mainScreen .scale property is equal to 2.0. You CANNOT assume a device is running iOS4 if the scale property exists as the iPad 3.2 also contains this property. On an iPad running iOS3.2 scale will return 1.0 in 1x mode and 2.0 in 2x mode.. can test this yourself in the simulator. I test for the displayLinkWithTarget selector method on the main screen which exists in iOS4.x but not iOS3.2 and then check the screen's scale if UIScreen mainScreen respondsToSelector @selector displayLinkWithTarget..
Do you need to create an NSAutoreleasePool within a block in GCD? http://stackoverflow.com/questions/4141123/do-you-need-to-create-an-nsautoreleasepool-within-a-block-in-gcd NSOperation on an NSOperationQueue you need to create an NSAutoreleasePool for that thread or operation because none exists by default. Does the same rule apply to a block that is placed within a Grand Central Dispatch queue and will be run on..
iOS SDK - Programmatically generate a PDF file http://stackoverflow.com/questions/4362734/ios-sdk-programmatically-generate-a-pdf-file First there is a bug with CoreGraphics PDF generation in iOS that results in corrupted PDFs. I know this issue exists up to and including iOS 4.1 I haven't tested iOS 4.2 . The issue is related to fonts and only shows up if you include text..
What is the difference between -viewWillAppear: and -viewDidAppear:? http://stackoverflow.com/questions/5630649/what-is-the-difference-between-viewwillappear-and-viewdidappear example doing a webservice call to get extra data for the form above.The good thing is that because the view already exists and is being displayed to the user you can show a nice Waiting message to the user while you get the data. share improve..
How do I set up a simple delegate to communicate between two view controllers? http://stackoverflow.com/questions/6168919/how-do-i-set-up-a-simple-delegate-to-communicate-between-two-view-controllers 1. Forward declaration of ChildViewControllerDelegate this just declares that a ChildViewControllerDelegate type exists so that we can use it later. @protocol ChildViewControllerDelegate 2. Declaration of the view controller class as usual..
How to disable iOS System Sounds http://stackoverflow.com/questions/6284402/how-to-disable-ios-system-sounds change the system sounds which turns out to be the ringer btw using the AVSystemController. However AVSystemController exists in the private Celestial framework. Since this framework is referenced by UIKit it is still possible to use this class without..
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 loadView if it's defined or by loading the view from the NIB that was specified in initWithNibName bundle . If neither exists UIKit just loads an empty view. UIKit calls viewDidLoad once the view and its subviews have been fully loaded. At this point..
performSelector may cause a leak because its selector is unknown http://stackoverflow.com/questions/7017281/performselector-may-cause-a-leak-because-its-selector-is-unknown NSSelectorFromString @ someMethod Why do I get this warning I understand the compiler can't check if the selector exists or not but why would that cause a leak And how can I change my code so that I don't get this warning anymore iphone objective..
Can you reference Xib files from static libraries on the iPhone? http://stackoverflow.com/questions/707429/can-you-reference-xib-files-from-static-libraries-on-the-iphone directory that may contain all manner of files including resource files xib executable files and static libraries. It exists on the filesystem as a group of individual files. A static library is a single file that contains classes code and variables..
iCloud basics and code sample [closed] http://stackoverflow.com/questions/7795629/icloud-basics-and-code-sample object query _query nil we're done with it void loadDocument 2 iCloud query Looks if there exists a file called text.txt in the cloud NSMetadataQuery query NSMetadataQuery alloc init _query query SCOPE query setSearchScopes..
Application crashed while importing songs from Ipod library in Iphone for iOs 5.0 http://stackoverflow.com/questions/8077725/application-crashed-while-importing-songs-from-ipod-library-in-iphone-for-ios-5 data writeToFile filePath atomically YES if NSFileManager defaultManager fileExistsAtPath filePath NSLog @ file exists else NSLog @ file doesn't exist NSLog @ archiving playlist success d success archiver release data release self UpdateMediaCollection..
MKMapView: Instead of Annotation Pin, a custom view http://stackoverflow.com/questions/9814988/mkmapview-instead-of-annotation-pin-a-custom-view setTitle @ I am here return pinView Notice that animatesDrop is also commented out since that property only exists in MKPinAnnotationView . If you still want your image annotations to drop you'll have to do the animation yourself. You..
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