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2014/10/15 ¤U¤È 10:13:42
iphone Programming Glossary: seemHow 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 using the Cocoa Touch libraries. I came up with a way to do this using an NSURL . The way I did it seems a bit unreliable because even Google could one day be down and relying on a 3rd party seems bad and.. did it seems a bit unreliable because even Google could one day be down and relying on a 3rd party seems bad and while I could check to see for a response from some other websites if Google didn't respond.. I could check to see for a response from some other websites if Google didn't respond it does seem wasteful and an unnecessary overhead on my application. BOOL connectedToInternet NSString URLString..
UIImagePickerController and extracting EXIF data from existing photos http://stackoverflow.com/questions/1238838/uiimagepickercontroller-and-extracting-exif-data-from-existing-photos of the photo after selection. However a couple of apps in the app store Mobile Fotos PixelPipe seem to be able to read the original files and the EXIF data stored within them enabling the app to extract.. EXIF data stored within them enabling the app to extract the geodata from the selected photo. They seem to do this by reading the original file from the private var mobile Media DCIM 100APPLE folder and running.. considering making a table of hashes and matching against the first x pixels of each image. This seems a bit over the top though and probably quite slow. Any suggestions iphone cocoa touch gps uiimagepickercontroller..
AES Encryption for an NSString on the iPhone http://stackoverflow.com/questions/1400246/aes-encryption-for-an-nsstring-on-the-iphone to know exactly which problems you're encountering. However the blog post you link to does seem to work pretty decently... aside from the extra comma in each call to CCCrypt which caused compile errors... compile errors. A later comment on that post includes this adapted code which works for me and seems a bit more straightforward. If you include their code for the NSData category you can write something..
How to customize the callout bubble for MKAnnotationView? http://stackoverflow.com/questions/1565828/how-to-customize-the-callout-bubble-for-mkannotationview tried going down a different path and just handling all touch events myself in the map and I can't seem to get this working. I read other posts related to catching touch events in the map view but they aren't..
How to programmatically sense the iPhone mute switch? http://stackoverflow.com/questions/287543/how-to-programmatically-sense-the-iphone-mute-switch to programmatically sense the iPhone mute switch I can't seem to find in the SDK how to programatically sense the mute button switch on the iPhone. When my app plays..
Managing multiple asynchronous NSURLConnection connections http://stackoverflow.com/questions/332276/managing-multiple-asynchronous-nsurlconnection-connections kCFAllocatorDefault 0 kCFTypeDictionaryKeyCallBacks kCFTypeDictionaryValueCallBacks It may seem odd to use this instead of NSMutableDictionary but I do it because this CFDictionary only retains its..
How do I detect that an iOS app is running on a jailbroken phone? http://stackoverflow.com/questions/413242/how-do-i-detect-that-an-ios-app-is-running-on-a-jailbroken-phone would I go about determining this I thought someone had asked this question before but I cannot seem to find it now. iphone jailbreak share improve this question It depends what you mean by jailbreak...
Want to display a 3D model on the iPhone: how to get started? http://stackoverflow.com/questions/413919/want-to-display-a-3d-model-on-the-iphone-how-to-get-started about XCode My main problem is that I don't know where to start All the iPhone books I found seem to be about creating GUI applications not OpenGL apps. I found an OpenGL book but I don't know how much.. read that they are outdated and much of the sample code doesn't work on the iPhone SDK plus it seems geared towards the Model View Controller paradigm which doesn't seem that suited for 3D apps. Basically.. on the iPhone SDK plus it seems geared towards the Model View Controller paradigm which doesn't seem that suited for 3D apps. Basically I'm confused about what my first steps should be. iphone ios opengl..
CSS “position: fixed;” into iPad/iPhone? http://stackoverflow.com/questions/4889601/css-position-fixed-into-ipad-iphone been strugling with fixed positioning in iPad for a while. I know iScroll and it does not always seem to work even their demo . I also know that Sencha has a fix for that but couldn't ctrl f the source..
What's the best way to communicate between view controllers? http://stackoverflow.com/questions/569940/whats-the-best-way-to-communicate-between-view-controllers this question These are good questions and its great to see that you're doing this research and seem concerned with learning how to do it right instead of just hacking it together. First I agree with the..
How to change UIPickerView height http://stackoverflow.com/questions/573979/how-to-change-uipickerview-height change UIPickerView height Is it possible to change the height of UIPickerView Some applications seem to have shorter PickerViews but setting a smaller frame doesn't seem to work and the frame is locked.. Some applications seem to have shorter PickerViews but setting a smaller frame doesn't seem to work and the frame is locked in Interface Builder. iphone cocoa touch uikit uipickerview share.. in Interface Builder. iphone cocoa touch uikit uipickerview share improve this question It seems obvious that Apple doesn't particularly invite mucking with the default height of the UIPickerView..
Tab bar controller inside a navigation controller, or sharing a navigation root view http://stackoverflow.com/questions/576764/tab-bar-controller-inside-a-navigation-controller-or-sharing-a-navigation-root a UI structured like in the Tweetie app which behaves as so the top level view controller seems to be a navigation controller whose root view is an Accounts table view. If you click on any account.. list and lets you drill down further the subsequent levels don't show the tab bar . So this seems like the implementation hierarchy is UINavigationController Accounts UITableViewController UITabBarController.. UITableViewController Detail view of a tweet user etc Replies UITableViewController ... This seems to work ^1 but appears to be unsupported according to the SDK documentation for pushViewController..
CADisplayLink OpenGL rendering breaks UIScrollView behaviour http://stackoverflow.com/questions/5944050/cadisplaylink-opengl-rendering-breaks-uiscrollview-behaviour some aspects of scroll view behaviour on certain phones I'm testing on the 3GS and simulator seem to work fine while the iPhone4 and the 3G don't . Does anyone know how I could get around this clash..
How do I get a background location update every n minutes in my iOS application? http://stackoverflow.com/questions/6347503/how-do-i-get-a-background-location-update-every-n-minutes-in-my-ios-application This works in the background as expected based on the configured properties but it seems not possible to force it to update the location every n minutes NSTimer Does work when the app is running.. location every n minutes NSTimer Does work when the app is running in the foreground but doesn't seem to be designed for background tasks Local notifications Local notifications can be scheduled every n.. without the user having to launch the app via the notification . This approach also doesn't seem to be a clean approach as this is not what notifications should be used for. UIApplication beginBackgroundTaskWithExpirationHandler..
Reducing piracy of iPhone applications http://stackoverflow.com/questions/846309/reducing-piracy-of-iphone-applications authorizes use of the application Likewise what code would I use to access that extra data What seem to be the best available technical approaches to this problem at the present time Please refrain from..
Having trouble adding objects to NSMutableArray in Objective C http://stackoverflow.com/questions/851926/having-trouble-adding-objects-to-nsmutablearray-in-objective-c viewedCardsArray addObject cardIdObject cardIdObject release So this code executes and does not seem to leak according to the Leaks performance tool . However when stepping through the code at no point..
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 check to see if I have an Internet connection on the iPhone using the Cocoa Touch libraries. I came up with a way to do this using an NSURL . The way I did it seems a bit unreliable because even Google could one day be down and relying on a 3rd party seems bad and while I could check to see for a response from some other websites.. I came up with a way to do this using an NSURL . The way I did it seems a bit unreliable because even Google could one day be down and relying on a 3rd party seems bad and while I could check to see for a response from some other websites if Google didn't respond it does seem wasteful and an unnecessary overhead on my application... one day be down and relying on a 3rd party seems bad and while I could check to see for a response from some other websites if Google didn't respond it does seem wasteful and an unnecessary overhead on my application. BOOL connectedToInternet NSString URLString NSString stringWithContentsOfURL NSURL URLWithString @ http..
UIImagePickerController and extracting EXIF data from existing photos http://stackoverflow.com/questions/1238838/uiimagepickercontroller-and-extracting-exif-data-from-existing-photos known that UIImagePickerController doesn't return the metadata of the photo after selection. However a couple of apps in the app store Mobile Fotos PixelPipe seem to be able to read the original files and the EXIF data stored within them enabling the app to extract the geodata from the selected photo. They seem to do this.. seem to be able to read the original files and the EXIF data stored within them enabling the app to extract the geodata from the selected photo. They seem to do this by reading the original file from the private var mobile Media DCIM 100APPLE folder and running it through an EXIF library. However I can't work out.. to know the file size of the image that was selected. I'm considering making a table of hashes and matching against the first x pixels of each image. This seems a bit over the top though and probably quite slow. Any suggestions iphone cocoa touch gps uiimagepickercontroller exif share improve this question Have you..
AES Encryption for an NSString on the iPhone http://stackoverflow.com/questions/1400246/aes-encryption-for-an-nsstring-on-the-iphone this question Since you haven't posted any code it's difficult to know exactly which problems you're encountering. However the blog post you link to does seem to work pretty decently... aside from the extra comma in each call to CCCrypt which caused compile errors. A later comment on that post includes this adapted code.. aside from the extra comma in each call to CCCrypt which caused compile errors. A later comment on that post includes this adapted code which works for me and seems a bit more straightforward. If you include their code for the NSData category you can write something like this Note The printf calls are only for demonstrating..
How to customize the callout bubble for MKAnnotationView? http://stackoverflow.com/questions/1565828/how-to-customize-the-callout-bubble-for-mkannotationview without having the default callout bubble view show up. I tried going down a different path and just handling all touch events myself in the map and I can't seem to get this working. I read other posts related to catching touch events in the map view but they aren't exactly what I want. Is there a way to dig into the map..
How to programmatically sense the iPhone mute switch? http://stackoverflow.com/questions/287543/how-to-programmatically-sense-the-iphone-mute-switch to programmatically sense the iPhone mute switch I can't seem to find in the SDK how to programatically sense the mute button switch on the iPhone. When my app plays background music it responds properly to the volume button..
Managing multiple asynchronous NSURLConnection connections http://stackoverflow.com/questions/332276/managing-multiple-asynchronous-nsurlconnection-connections with it. i.e. connectionToInfoMapping CFDictionaryCreateMutable kCFAllocatorDefault 0 kCFTypeDictionaryKeyCallBacks kCFTypeDictionaryValueCallBacks It may seem odd to use this instead of NSMutableDictionary but I do it because this CFDictionary only retains its keys the NSURLConnection whereas NSDictionary copies its keys..
How do I detect that an iOS app is running on a jailbroken phone? http://stackoverflow.com/questions/413242/how-do-i-detect-that-an-ios-app-is-running-on-a-jailbroken-phone I want my app to behave differently on a jailbroken iPhone how would I go about determining this I thought someone had asked this question before but I cannot seem to find it now. iphone jailbreak share improve this question It depends what you mean by jailbreak. In the simple case you should be able to see if Cydia is..
Want to display a 3D model on the iPhone: how to get started? http://stackoverflow.com/questions/413919/want-to-display-a-3d-model-on-the-iphone-how-to-get-started OpenGL or OpenGL ES which the iPhone apparently uses Anything about XCode My main problem is that I don't know where to start All the iPhone books I found seem to be about creating GUI applications not OpenGL apps. I found an OpenGL book but I don't know how much if any applies to iPhone development. And I find the Objective.. Objective C I know of books like Aaron Hillgrass' but I've also read that they are outdated and much of the sample code doesn't work on the iPhone SDK plus it seems geared towards the Model View Controller paradigm which doesn't seem that suited for 3D apps. Basically I'm confused about what my first steps should be. iphone.. they are outdated and much of the sample code doesn't work on the iPhone SDK plus it seems geared towards the Model View Controller paradigm which doesn't seem that suited for 3D apps. Basically I'm confused about what my first steps should be. iphone ios opengl es share improve this question You should probably start..
CSS “position: fixed;” into iPad/iPhone? http://stackoverflow.com/questions/4889601/css-position-fixed-into-ipad-iphone &ldquo position fixed &rdquo into iPad iPhone I have been strugling with fixed positioning in iPad for a while. I know iScroll and it does not always seem to work even their demo . I also know that Sencha has a fix for that but couldn't ctrl f the source code for that fix. I am hoping that someone may have the solution...
What's the best way to communicate between view controllers? http://stackoverflow.com/questions/569940/whats-the-best-way-to-communicate-between-view-controllers cocoa touch delegates key value observing share improve this question These are good questions and its great to see that you're doing this research and seem concerned with learning how to do it right instead of just hacking it together. First I agree with the previous answers which focus on the importance of putting..
How to change UIPickerView height http://stackoverflow.com/questions/573979/how-to-change-uipickerview-height to change UIPickerView height Is it possible to change the height of UIPickerView Some applications seem to have shorter PickerViews but setting a smaller frame doesn't seem to work and the frame is locked in Interface Builder. iphone cocoa touch uikit uipickerview.. height Is it possible to change the height of UIPickerView Some applications seem to have shorter PickerViews but setting a smaller frame doesn't seem to work and the frame is locked in Interface Builder. iphone cocoa touch uikit uipickerview share improve this question It seems obvious that Apple doesn't.. a smaller frame doesn't seem to work and the frame is locked in Interface Builder. iphone cocoa touch uikit uipickerview share improve this question It seems obvious that Apple doesn't particularly invite mucking with the default height of the UIPickerView but I have found that you can achieve a change in the height..
Tab bar controller inside a navigation controller, or sharing a navigation root view http://stackoverflow.com/questions/576764/tab-bar-controller-inside-a-navigation-controller-or-sharing-a-navigation-root or sharing a navigation root view I'm trying to implement a UI structured like in the Tweetie app which behaves as so the top level view controller seems to be a navigation controller whose root view is an Accounts table view. If you click on any account it goes to the second level which has a tab bar across the.. has a tab bar across the bottom. Each tab item shows a different list and lets you drill down further the subsequent levels don't show the tab bar . So this seems like the implementation hierarchy is UINavigationController Accounts UITableViewController UITabBarController Tweets UITableViewController Detail view of a tweet.. Accounts UITableViewController UITabBarController Tweets UITableViewController Detail view of a tweet user etc Replies UITableViewController ... This seems to work ^1 but appears to be unsupported according to the SDK documentation for pushViewController animated emphasis added viewController The view controller that..
CADisplayLink OpenGL rendering breaks UIScrollView behaviour http://stackoverflow.com/questions/5944050/cadisplaylink-opengl-rendering-breaks-uiscrollview-behaviour instead of the default run mode but unfortunately this breaks some aspects of scroll view behaviour on certain phones I'm testing on the 3GS and simulator seem to work fine while the iPhone4 and the 3G don't . Does anyone know how I could get around this clash between the CADisplayLink and the UIScrollView or know how..
How do I get a background location update every n minutes in my iOS application? http://stackoverflow.com/questions/6347503/how-do-i-get-a-background-location-update-every-n-minutes-in-my-ios-application startUpdatingLocation startMonitoringSignificantLocationChanges This works in the background as expected based on the configured properties but it seems not possible to force it to update the location every n minutes NSTimer Does work when the app is running in the foreground but doesn't seem to be designed for.. but it seems not possible to force it to update the location every n minutes NSTimer Does work when the app is running in the foreground but doesn't seem to be designed for background tasks Local notifications Local notifications can be scheduled every n minutes but it's not possible to execute some code to get the.. it's not possible to execute some code to get the current location without the user having to launch the app via the notification . This approach also doesn't seem to be a clean approach as this is not what notifications should be used for. UIApplication beginBackgroundTaskWithExpirationHandler As far as I understand this..
Reducing piracy of iPhone applications http://stackoverflow.com/questions/846309/reducing-piracy-of-iphone-applications the application to create a valid registration token that authorizes use of the application Likewise what code would I use to access that extra data What seem to be the best available technical approaches to this problem at the present time Please refrain from non programming answers about how piracy is inevitable etc...
Having trouble adding objects to NSMutableArray in Objective C http://stackoverflow.com/questions/851926/having-trouble-adding-objects-to-nsmutablearray-in-objective-c NSNumber alloc initWithInt int self.currentCard cardId viewedCardsArray addObject cardIdObject cardIdObject release So this code executes and does not seem to leak according to the Leaks performance tool . However when stepping through the code at no point does CardIdObject appear in viewedCardsArray . Looking through..
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 on the iPhone using the Cocoa Touch libraries. I came up with a way to do this using an NSURL . The way I did it seems a bit unreliable because even Google could one day be down and relying on a 3rd party seems bad and while I could check.. NSURL . The way I did it seems a bit unreliable because even Google could one day be down and relying on a 3rd party seems bad and while I could check to see for a response from some other websites if Google didn't respond it does seem wasteful.. seems bad and while I could check to see for a response from some other websites if Google didn't respond it does seem wasteful and an unnecessary overhead on my application. BOOL connectedToInternet NSString URLString NSString stringWithContentsOfURL..
UIImagePickerController and extracting EXIF data from existing photos http://stackoverflow.com/questions/1238838/uiimagepickercontroller-and-extracting-exif-data-from-existing-photos return the metadata of the photo after selection. However a couple of apps in the app store Mobile Fotos PixelPipe seem to be able to read the original files and the EXIF data stored within them enabling the app to extract the geodata from.. files and the EXIF data stored within them enabling the app to extract the geodata from the selected photo. They seem to do this by reading the original file from the private var mobile Media DCIM 100APPLE folder and running it through an.. was selected. I'm considering making a table of hashes and matching against the first x pixels of each image. This seems a bit over the top though and probably quite slow. Any suggestions iphone cocoa touch gps uiimagepickercontroller exif..
AES Encryption for an NSString on the iPhone http://stackoverflow.com/questions/1400246/aes-encryption-for-an-nsstring-on-the-iphone any code it's difficult to know exactly which problems you're encountering. However the blog post you link to does seem to work pretty decently... aside from the extra comma in each call to CCCrypt which caused compile errors. A later comment.. to CCCrypt which caused compile errors. A later comment on that post includes this adapted code which works for me and seems a bit more straightforward. If you include their code for the NSData category you can write something like this Note The..
How to customize the callout bubble for MKAnnotationView? http://stackoverflow.com/questions/1565828/how-to-customize-the-callout-bubble-for-mkannotationview view show up. I tried going down a different path and just handling all touch events myself in the map and I can't seem to get this working. I read other posts related to catching touch events in the map view but they aren't exactly what I..
How to programmatically sense the iPhone mute switch? http://stackoverflow.com/questions/287543/how-to-programmatically-sense-the-iphone-mute-switch to programmatically sense the iPhone mute switch I can't seem to find in the SDK how to programatically sense the mute button switch on the iPhone. When my app plays background music..
Managing multiple asynchronous NSURLConnection connections http://stackoverflow.com/questions/332276/managing-multiple-asynchronous-nsurlconnection-connections CFDictionaryCreateMutable kCFAllocatorDefault 0 kCFTypeDictionaryKeyCallBacks kCFTypeDictionaryValueCallBacks It may seem odd to use this instead of NSMutableDictionary but I do it because this CFDictionary only retains its keys the NSURLConnection..
How do I detect that an iOS app is running on a jailbroken phone? http://stackoverflow.com/questions/413242/how-do-i-detect-that-an-ios-app-is-running-on-a-jailbroken-phone jailbroken iPhone how would I go about determining this I thought someone had asked this question before but I cannot seem to find it now. iphone jailbreak share improve this question It depends what you mean by jailbreak. In the simple case..
Want to display a 3D model on the iPhone: how to get started? http://stackoverflow.com/questions/413919/want-to-display-a-3d-model-on-the-iphone-how-to-get-started apparently uses Anything about XCode My main problem is that I don't know where to start All the iPhone books I found seem to be about creating GUI applications not OpenGL apps. I found an OpenGL book but I don't know how much if any applies to.. but I've also read that they are outdated and much of the sample code doesn't work on the iPhone SDK plus it seems geared towards the Model View Controller paradigm which doesn't seem that suited for 3D apps. Basically I'm confused about.. code doesn't work on the iPhone SDK plus it seems geared towards the Model View Controller paradigm which doesn't seem that suited for 3D apps. Basically I'm confused about what my first steps should be. iphone ios opengl es share improve..
CSS “position: fixed;” into iPad/iPhone? http://stackoverflow.com/questions/4889601/css-position-fixed-into-ipad-iphone iPad iPhone I have been strugling with fixed positioning in iPad for a while. I know iScroll and it does not always seem to work even their demo . I also know that Sencha has a fix for that but couldn't ctrl f the source code for that fix. I..
What's the best way to communicate between view controllers? http://stackoverflow.com/questions/569940/whats-the-best-way-to-communicate-between-view-controllers share improve this question These are good questions and its great to see that you're doing this research and seem concerned with learning how to do it right instead of just hacking it together. First I agree with the previous answers..
How to change UIPickerView height http://stackoverflow.com/questions/573979/how-to-change-uipickerview-height to change UIPickerView height Is it possible to change the height of UIPickerView Some applications seem to have shorter PickerViews but setting a smaller frame doesn't seem to work and the frame is locked in Interface Builder... the height of UIPickerView Some applications seem to have shorter PickerViews but setting a smaller frame doesn't seem to work and the frame is locked in Interface Builder. iphone cocoa touch uikit uipickerview share improve this question.. the frame is locked in Interface Builder. iphone cocoa touch uikit uipickerview share improve this question It seems obvious that Apple doesn't particularly invite mucking with the default height of the UIPickerView but I have found that..
Tab bar controller inside a navigation controller, or sharing a navigation root view http://stackoverflow.com/questions/576764/tab-bar-controller-inside-a-navigation-controller-or-sharing-a-navigation-root I'm trying to implement a UI structured like in the Tweetie app which behaves as so the top level view controller seems to be a navigation controller whose root view is an Accounts table view. If you click on any account it goes to the second.. tab item shows a different list and lets you drill down further the subsequent levels don't show the tab bar . So this seems like the implementation hierarchy is UINavigationController Accounts UITableViewController UITabBarController Tweets UITableViewController.. UITabBarController Tweets UITableViewController Detail view of a tweet user etc Replies UITableViewController ... This seems to work ^1 but appears to be unsupported according to the SDK documentation for pushViewController animated emphasis added..
CADisplayLink OpenGL rendering breaks UIScrollView behaviour http://stackoverflow.com/questions/5944050/cadisplaylink-opengl-rendering-breaks-uiscrollview-behaviour unfortunately this breaks some aspects of scroll view behaviour on certain phones I'm testing on the 3GS and simulator seem to work fine while the iPhone4 and the 3G don't . Does anyone know how I could get around this clash between the CADisplayLink..
How do I get a background location update every n minutes in my iOS application? http://stackoverflow.com/questions/6347503/how-do-i-get-a-background-location-update-every-n-minutes-in-my-ios-application This works in the background as expected based on the configured properties but it seems not possible to force it to update the location every n minutes NSTimer Does work when the app is running in the foreground.. it to update the location every n minutes NSTimer Does work when the app is running in the foreground but doesn't seem to be designed for background tasks Local notifications Local notifications can be scheduled every n minutes but it's not.. get the current location without the user having to launch the app via the notification . This approach also doesn't seem to be a clean approach as this is not what notifications should be used for. UIApplication beginBackgroundTaskWithExpirationHandler..
Reducing piracy of iPhone applications http://stackoverflow.com/questions/846309/reducing-piracy-of-iphone-applications token that authorizes use of the application Likewise what code would I use to access that extra data What seem to be the best available technical approaches to this problem at the present time Please refrain from non programming answers..
Having trouble adding objects to NSMutableArray in Objective C http://stackoverflow.com/questions/851926/having-trouble-adding-objects-to-nsmutablearray-in-objective-c cardId viewedCardsArray addObject cardIdObject cardIdObject release So this code executes and does not seem to leak according to the Leaks performance tool . However when stepping through the code at no point does CardIdObject appear..
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