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2014/10/15 ¤U¤È 10:05:56
iphone Programming Glossary: dataHow can I upload a photo to a server with the iPhone? http://stackoverflow.com/questions/125306/how-can-i-upload-a-photo-to-a-server-with-the-iphone Private void upload NSURLRequest postRequestWithURL NSURL url boundry NSString boundry data NSData data NSData compress NSData data void uploadSucceeded BOOL success void connectionDidFinishLoading.. void upload NSURLRequest postRequestWithURL NSURL url boundry NSString boundry data NSData data NSData compress NSData data void uploadSucceeded BOOL success void connectionDidFinishLoading NSURLConnection.. postRequestWithURL NSURL url boundry NSString boundry data NSData data NSData compress NSData data void uploadSucceeded BOOL success void connectionDidFinishLoading NSURLConnection connection @end @implementation..
Add UIPickerView & a Button in Action sheet - How? http://stackoverflow.com/questions/1262574/add-uipickerview-a-button-in-action-sheet-how SimpleTableVC . In SimpleTableViewController.h create an NSArray property that will represent the data in the table. Also in SimpleTableViewController.h create a protocol SimpleTableViewControllerDelegate.. selection back to the parent controller. In SimpleTableViewController.m implement the tableview data source and delegate methods calling itemSelectedatRow in tableView didSelectRowAtIndexPath . This approach.. method. Then to open the modal just instantiate a new SimpleTableViewController set the table data and delegate and present it. UINavigationController navigationController UINavigationController self.storyboard..
AES Encryption for an NSString on the iPhone http://stackoverflow.com/questions/1400246/aes-encryption-for-an-nsstring-on-the-iphone in the right direction to be able to encrypt a string returning another string with the encrypted data I've been trying with AES256 encryption. I want to write a method which takes two NSString instances.. key with the passcode in a way that can be reversed if the passcode is supplied with the encrypted data. The method should then return an NSString created from the encrypted data. I've tried the technique.. with the encrypted data. The method should then return an NSString created from the encrypted data. I've tried the technique detailed in the first comment on this post but I've had no luck so far. Apple's..
Programmatically get own phone number in iOS http://stackoverflow.com/questions/193182/programmatically-get-own-phone-number-in-ios from Apple For security reasons iPhone OS restricts an application including its preferences and data to a unique location in the file system. This restriction is part of the security feature known as the..
How to take a screenshot programmatically http://stackoverflow.com/questions/2200736/how-to-take-a-screenshot-programmatically UIImage image UIGraphicsGetImageFromCurrentImageContext UIGraphicsEndImageContext NSData data UIImagePNGRepresentation image data writeToFile @ foo.png atomically YES UPDATE April 2011 for retina.. UIGraphicsEndImageContext NSData data UIImagePNGRepresentation image data writeToFile @ foo.png atomically YES UPDATE April 2011 for retina display change the first line into..
How do I export UIImage array as a movie? http://stackoverflow.com/questions/3741323/how-do-i-export-uiimage-array-as-a-movie samples Or you can use AVAssetWriterInputPixelBufferAdaptor. That lets you feed the writer input data from a CVPixelBuffer that ™s quite easy to create from a CGImage. writerInput appendSampleBuffer sampleBuffer.. status kCVReturnSuccess pxbuffer NULL CVPixelBufferLockBaseAddress pxbuffer 0 void pxdata CVPixelBufferGetBaseAddress pxbuffer NSParameterAssert pxdata NULL CGColorSpaceRef rgbColorSpace CGColorSpaceCreateDeviceRGB.. pxbuffer 0 void pxdata CVPixelBufferGetBaseAddress pxbuffer NSParameterAssert pxdata NULL CGColorSpaceRef rgbColorSpace CGColorSpaceCreateDeviceRGB CGContextRef context CGBitmapContextCreate..
parsing HTML on the iPhone [closed] http://stackoverflow.com/questions/405749/parsing-html-on-the-iphone XPath Tutorial to feel comfortable with the XPath language. Code Example #import TFHpple.h NSData data NSData alloc initWithContentsOfFile @ example.html Create parser xpathParser TFHpple alloc initWithHTMLData.. initWithContentsOfFile @ example.html Create parser xpathParser TFHpple alloc initWithHTMLData data Get all the cells of the 2nd row of the 3rd table NSArray elements xpathParser searchWithXPathQuery.. 0 Get the text within the cell tag NSString content element content xpathParser release data release Known issues As hpple is a wrapper over XPathQuery which is another wrapper this option probably..
Delete/Reset all entries in Core Data? http://stackoverflow.com/questions/1077810/delete-reset-all-entries-in-core-data Reset all entries in Core Data Do you know of any way to delete all of the entries stored in Core Data My schema should stay the same.. Reset all entries in Core Data Do you know of any way to delete all of the entries stored in Core Data My schema should stay the same I just want to reset it to blank. Edit I'm looking to do this programmatically.. at runtime. Update for iOS5 With the introduction of external binary storage allowsExternalBinaryDataStorage or Store in External Record File in iOS 5 and OS X 10.7 simply deleting files pointed by storeURLs..
Where to place the “Core Data Stack” in a Cocoa/Cocoa Touch application http://stackoverflow.com/questions/1267520/where-to-place-the-core-data-stack-in-a-cocoa-cocoa-touch-application to place the &ldquo Core Data Stack&rdquo in a Cocoa Cocoa Touch application In the iPhone Core Data Template Apple places the Core.. to place the &ldquo Core Data Stack&rdquo in a Cocoa Cocoa Touch application In the iPhone Core Data Template Apple places the Core Data Stack in the App Delegate. My initial inclination however is to.. in a Cocoa Cocoa Touch application In the iPhone Core Data Template Apple places the Core Data Stack in the App Delegate. My initial inclination however is to move this code into it's own class whose..
Use CoreData or SQLite on iPhone? [closed] http://stackoverflow.com/questions/1318467/use-coredata-or-sqlite-on-iphone CoreData or SQLite on iPhone closed Since CoreData has become available for the iPhone in OS 3.0 is it meant.. CoreData or SQLite on iPhone closed Since CoreData has become available for the iPhone in OS 3.0 is it meant to be the answer to data persistence and replace.. SQLite What reasons exist to still use SQLite What are advantages disadvantages of SQLite vs. CoreData iphone ios sqlite core data share improve this question This is a common question here Core Data..
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 size_t byteCount size_t pixelCount CGContextRef context CGColorSpaceRef colorSpace UInt8 pixelByteData A pointer to an array of RGBA bytes in memory RPVW_RGBAPixel pixelData The pixel struct with alpha in.. colorSpace UInt8 pixelByteData A pointer to an array of RGBA bytes in memory RPVW_RGBAPixel pixelData The pixel struct with alpha in this version typedef struct RGBAPixel byte red byte green byte blue byte.. if colorSpace NSLog @ Error allocating color space. return nil self setPixelData malloc byteCount if pixelData NSLog @ Error allocating bitmap memory. Releasing color space. CGColorSpaceRelease..
JSON and Core Data on the iPhone http://stackoverflow.com/questions/2362323/json-and-core-data-on-the-iphone and Core Data on the iPhone I have a core data object graph consisting of two entities linked by a to many relationship..
How to Sync iPhone Core Data with web server, and then push to other devices? http://stackoverflow.com/questions/5035132/how-to-sync-iphone-core-data-with-web-server-and-then-push-to-other-devices to Sync iPhone Core Data with web server and then push to other devices I have been working on a method to sync core data stored.. such as an iPad or a Mac. There are not many if any at all sync frameworks for use with Core Data on iOS. However I have been thinking about the following concept A change is made to the local core.. about I have looked at REST frameworks such as ObjectiveResource Core Resource and RestfulCoreData . Of course these are all working with Ruby on Rails which I am not tied to but it's a place to start...
What's the best way to communicate between view controllers? http://stackoverflow.com/questions/569940/whats-the-best-way-to-communicate-between-view-controllers http cs193p.stanford.edu downloads 08 NavigationTabBarControllers.pdf Page 16 51 How Not To Share Data Global Variables or singletons This includes your application delegate Direct dependencies make your.. A bit further on we get this slide telling us what we should do. Page 18 51 Best Practices for Data Flow Figure out exactly what needs to be communicated Define input parameters for your view controller..
iPhone Data Usage Tracking/Monitoring http://stackoverflow.com/questions/7946699/iphone-data-usage-tracking-monitoring Data Usage Tracking Monitoring I've searched over this topic but found very few details which were helpful... post with other posts before marking this as DUPLICATE and not just by the subject. NSArray getDataCountersForType int type BOOL success struct ifaddrs addrs nil const struct ifaddrs cursor nil const.. still come because this method provides network bytes exchanges and not just internet . NSArray getDataCounters BOOL success struct ifaddrs addrs const struct ifaddrs cursor const struct if_data networkStatisc..
How can I upload a photo to a server with the iPhone? http://stackoverflow.com/questions/125306/how-can-i-upload-a-photo-to-a-server-with-the-iphone @ uploaded #define ASSERT x NSAssert x @ @interface EPUploader Private void upload NSURLRequest postRequestWithURL NSURL url boundry NSString boundry data NSData data NSData compress NSData data void uploadSucceeded BOOL success void connectionDidFinishLoading NSURLConnection connection @end @implementation EPUploader.. #define ASSERT x NSAssert x @ @interface EPUploader Private void upload NSURLRequest postRequestWithURL NSURL url boundry NSString boundry data NSData data NSData compress NSData data void uploadSucceeded BOOL success void connectionDidFinishLoading NSURLConnection connection @end @implementation EPUploader Uploader.. x @ @interface EPUploader Private void upload NSURLRequest postRequestWithURL NSURL url boundry NSString boundry data NSData data NSData compress NSData data void uploadSucceeded BOOL success void connectionDidFinishLoading NSURLConnection connection @end @implementation EPUploader Uploader initWithURL filePath..
Add UIPickerView & a Button in Action sheet - How? http://stackoverflow.com/questions/1262574/add-uipickerview-a-button-in-action-sheet-how controller for SimpleTableViewController a Storyboard ID of SimpleTableVC . In SimpleTableViewController.h create an NSArray property that will represent the data in the table. Also in SimpleTableViewController.h create a protocol SimpleTableViewControllerDelegate with a required method itemSelectedatRow and a weak property.. . This is how we will pass the selection back to the parent controller. In SimpleTableViewController.m implement the tableview data source and delegate methods calling itemSelectedatRow in tableView didSelectRowAtIndexPath . This approach has the added benefit of being fairly reusable. To use.. the SimpleTableViewDelegate and implement the itemSelectedAtRow method. Then to open the modal just instantiate a new SimpleTableViewController set the table data and delegate and present it. UINavigationController navigationController UINavigationController self.storyboard instantiateViewControllerWithIdentifier @ SimpleTableVC..
AES Encryption for an NSString on the iPhone http://stackoverflow.com/questions/1400246/aes-encryption-for-an-nsstring-on-the-iphone for an NSString on the iPhone Can anybody point me in the right direction to be able to encrypt a string returning another string with the encrypted data I've been trying with AES256 encryption. I want to write a method which takes two NSString instances one being the message to encrypt and the other being a 'passcode'.. it with I suspect I'd have to generate the encryption key with the passcode in a way that can be reversed if the passcode is supplied with the encrypted data. The method should then return an NSString created from the encrypted data. I've tried the technique detailed in the first comment on this post but I've had no.. in a way that can be reversed if the passcode is supplied with the encrypted data. The method should then return an NSString created from the encrypted data. I've tried the technique detailed in the first comment on this post but I've had no luck so far. Apple's CryptoExercise certainly has something but I can't make..
Programmatically get own phone number in iOS http://stackoverflow.com/questions/193182/programmatically-get-own-phone-number-in-ios was just rejected for using it. Here's the response from Apple For security reasons iPhone OS restricts an application including its preferences and data to a unique location in the file system. This restriction is part of the security feature known as the application's sandbox. The sandbox is a set of fine grained..
How to take a screenshot programmatically http://stackoverflow.com/questions/2200736/how-to-take-a-screenshot-programmatically self.window.layer renderInContext UIGraphicsGetCurrentContext UIImage image UIGraphicsGetImageFromCurrentImageContext UIGraphicsEndImageContext NSData data UIImagePNGRepresentation image data writeToFile @ foo.png atomically YES UPDATE April 2011 for retina display change the first line into this if UIScreen mainScreen.. UIGraphicsGetCurrentContext UIImage image UIGraphicsGetImageFromCurrentImageContext UIGraphicsEndImageContext NSData data UIImagePNGRepresentation image data writeToFile @ foo.png atomically YES UPDATE April 2011 for retina display change the first line into this if UIScreen mainScreen respondsToSelector @selector scale..
How do I export UIImage array as a movie? http://stackoverflow.com/questions/3741323/how-do-i-export-uiimage-array-as-a-movie videoWriter startSessionAtSourceTime ¦] 3 Write some samples Or you can use AVAssetWriterInputPixelBufferAdaptor. That lets you feed the writer input data from a CVPixelBuffer that ™s quite easy to create from a CGImage. writerInput appendSampleBuffer sampleBuffer 4 Finish the session writerInput markAsFinished videoWriter.. CFDictionaryRef options pxbuffer NSParameterAssert status kCVReturnSuccess pxbuffer NULL CVPixelBufferLockBaseAddress pxbuffer 0 void pxdata CVPixelBufferGetBaseAddress pxbuffer NSParameterAssert pxdata NULL CGColorSpaceRef rgbColorSpace CGColorSpaceCreateDeviceRGB CGContextRef context CGBitmapContextCreate.. status kCVReturnSuccess pxbuffer NULL CVPixelBufferLockBaseAddress pxbuffer 0 void pxdata CVPixelBufferGetBaseAddress pxbuffer NSParameterAssert pxdata NULL CGColorSpaceRef rgbColorSpace CGColorSpaceCreateDeviceRGB CGContextRef context CGBitmapContextCreate pxdata frameSize.width frameSize.height 8 4 frameSize.width..
parsing HTML on the iPhone [closed] http://stackoverflow.com/questions/405749/parsing-html-on-the-iphone XPathQuery.h XPathQuery.m Take a walk on w3school XPath Tutorial to feel comfortable with the XPath language. Code Example #import TFHpple.h NSData data NSData alloc initWithContentsOfFile @ example.html Create parser xpathParser TFHpple alloc initWithHTMLData data Get all the cells of the 2nd row of the 3rd table.. Code Example #import TFHpple.h NSData data NSData alloc initWithContentsOfFile @ example.html Create parser xpathParser TFHpple alloc initWithHTMLData data Get all the cells of the 2nd row of the 3rd table NSArray elements xpathParser searchWithXPathQuery @ table 3 tr 2 td Access the first cell TFHppleElement element.. td Access the first cell TFHppleElement element elements objectAtIndex 0 Get the text within the cell tag NSString content element content xpathParser release data release Known issues As hpple is a wrapper over XPathQuery which is another wrapper this option probably is not the most efficient. If performance is an issue in..
Delete/Reset all entries in Core Data? http://stackoverflow.com/questions/1077810/delete-reset-all-entries-in-core-data Reset all entries in Core Data Do you know of any way to delete all of the entries stored in Core Data My schema should stay the same I just want to reset it to blank. Edit I'm looking to do.. Reset all entries in Core Data Do you know of any way to delete all of the entries stored in Core Data My schema should stay the same I just want to reset it to blank. Edit I'm looking to do this programmatically so that a user can essentially hit a reset button... both fast and safe and can certainly be done programatically at runtime. Update for iOS5 With the introduction of external binary storage allowsExternalBinaryDataStorage or Store in External Record File in iOS 5 and OS X 10.7 simply deleting files pointed by storeURLs is not enough. You'll leave the external record files..
Where to place the “Core Data Stack” in a Cocoa/Cocoa Touch application http://stackoverflow.com/questions/1267520/where-to-place-the-core-data-stack-in-a-cocoa-cocoa-touch-application to place the &ldquo Core Data Stack&rdquo in a Cocoa Cocoa Touch application In the iPhone Core Data Template Apple places the Core Data Stack in the App Delegate. My initial inclination however.. to place the &ldquo Core Data Stack&rdquo in a Cocoa Cocoa Touch application In the iPhone Core Data Template Apple places the Core Data Stack in the App Delegate. My initial inclination however is to move this code into it's own class whose responsibility is to.. to place the &ldquo Core Data Stack&rdquo in a Cocoa Cocoa Touch application In the iPhone Core Data Template Apple places the Core Data Stack in the App Delegate. My initial inclination however is to move this code into it's own class whose responsibility is to handle the management of the Core..
Use CoreData or SQLite on iPhone? [closed] http://stackoverflow.com/questions/1318467/use-coredata-or-sqlite-on-iphone CoreData or SQLite on iPhone closed Since CoreData has become available for the iPhone in OS 3.0 is it meant to be the answer to data persistence and replace all need for.. CoreData or SQLite on iPhone closed Since CoreData has become available for the iPhone in OS 3.0 is it meant to be the answer to data persistence and replace all need for direct SQLite What reasons exist to still.. answer to data persistence and replace all need for direct SQLite What reasons exist to still use SQLite What are advantages disadvantages of SQLite vs. CoreData iphone ios sqlite core data share improve this question This is a common question here Core Data vs. SQLite for SQL experienced developers Core Data vs Sqlite..
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 subclass I declared instance variables size_t bytesPerRow size_t byteCount size_t pixelCount CGContextRef context CGColorSpaceRef colorSpace UInt8 pixelByteData A pointer to an array of RGBA bytes in memory RPVW_RGBAPixel pixelData The pixel struct with alpha in this version typedef struct RGBAPixel byte red byte green.. size_t pixelCount CGContextRef context CGColorSpaceRef colorSpace UInt8 pixelByteData A pointer to an array of RGBA bytes in memory RPVW_RGBAPixel pixelData The pixel struct with alpha in this version typedef struct RGBAPixel byte red byte green byte blue byte alpha RGBAPixel Bitmap function returns pre calculated RGBA.. Create RGB color space self setColorSpace CGColorSpaceCreateDeviceRGB if colorSpace NSLog @ Error allocating color space. return nil self setPixelData malloc byteCount if pixelData NSLog @ Error allocating bitmap memory. Releasing color space. CGColorSpaceRelease colorSpace return nil Create the bitmap context...
JSON and Core Data on the iPhone http://stackoverflow.com/questions/2362323/json-and-core-data-on-the-iphone and Core Data on the iPhone I have a core data object graph consisting of two entities linked by a to many relationship . I was curious as a relatively inexperienced iPhone..
How to Sync iPhone Core Data with web server, and then push to other devices? http://stackoverflow.com/questions/5035132/how-to-sync-iphone-core-data-with-web-server-and-then-push-to-other-devices to Sync iPhone Core Data with web server and then push to other devices I have been working on a method to sync core data stored in an iPhone application between multiple devices such.. data stored in an iPhone application between multiple devices such as an iPad or a Mac. There are not many if any at all sync frameworks for use with Core Data on iOS. However I have been thinking about the following concept A change is made to the local core data store and the change is saved. a If the device is online.. system. Is there anything fancy that I need to be thinking about I have looked at REST frameworks such as ObjectiveResource Core Resource and RestfulCoreData . Of course these are all working with Ruby on Rails which I am not tied to but it's a place to start. The main requirements I have for my solution are Any changes..
What's the best way to communicate between view controllers? http://stackoverflow.com/questions/569940/whats-the-best-way-to-communicate-between-view-controllers I'm going to quote from this serious of slides http cs193p.stanford.edu downloads 08 NavigationTabBarControllers.pdf Page 16 51 How Not To Share Data Global Variables or singletons This includes your application delegate Direct dependencies make your code less reusable And more difficult to debug test Ok. I'm.. instances in the app delegate methods. Fair 'nuff. A bit further on we get this slide telling us what we should do. Page 18 51 Best Practices for Data Flow Figure out exactly what needs to be communicated Define input parameters for your view controller For communicating back up the hierarchy use loose coupling..
iPhone Data Usage Tracking/Monitoring http://stackoverflow.com/questions/7946699/iphone-data-usage-tracking-monitoring Data Usage Tracking Monitoring I've searched over this topic but found very few details which were helpful. With these details I've tried to cook some code as follows... code as follows. Note Please compare the details shared in this post with other posts before marking this as DUPLICATE and not just by the subject. NSArray getDataCountersForType int type BOOL success struct ifaddrs addrs nil const struct ifaddrs cursor nil const struct sockaddr_dl dlAddr nil const struct if_data networkStatisc.. via WiFi and doesn't use internet if_iobytes values still come because this method provides network bytes exchanges and not just internet . NSArray getDataCounters BOOL success struct ifaddrs addrs const struct ifaddrs cursor const struct if_data networkStatisc int WiFiSent 0 int WiFiReceived 0 int WWANSent 0 int WWANReceived..
How can I upload a photo to a server with the iPhone? http://stackoverflow.com/questions/125306/how-can-i-upload-a-photo-to-a-server-with-the-iphone x @ @interface EPUploader Private void upload NSURLRequest postRequestWithURL NSURL url boundry NSString boundry data NSData data NSData compress NSData data void uploadSucceeded BOOL success void connectionDidFinishLoading NSURLConnection.. EPUploader Private void upload NSURLRequest postRequestWithURL NSURL url boundry NSString boundry data NSData data NSData compress NSData data void uploadSucceeded BOOL success void connectionDidFinishLoading NSURLConnection connection.. upload NSURLRequest postRequestWithURL NSURL url boundry NSString boundry data NSData data NSData compress NSData data void uploadSucceeded BOOL success void connectionDidFinishLoading NSURLConnection connection @end @implementation EPUploader..
Add UIPickerView & a Button in Action sheet - How? http://stackoverflow.com/questions/1262574/add-uipickerview-a-button-in-action-sheet-how a Storyboard ID of SimpleTableVC . In SimpleTableViewController.h create an NSArray property that will represent the data in the table. Also in SimpleTableViewController.h create a protocol SimpleTableViewControllerDelegate with a required method.. how we will pass the selection back to the parent controller. In SimpleTableViewController.m implement the tableview data source and delegate methods calling itemSelectedatRow in tableView didSelectRowAtIndexPath . This approach has the added.. the itemSelectedAtRow method. Then to open the modal just instantiate a new SimpleTableViewController set the table data and delegate and present it. UINavigationController navigationController UINavigationController self.storyboard instantiateViewControllerWithIdentifier..
AES Encryption for an NSString on the iPhone http://stackoverflow.com/questions/1400246/aes-encryption-for-an-nsstring-on-the-iphone Can anybody point me in the right direction to be able to encrypt a string returning another string with the encrypted data I've been trying with AES256 encryption. I want to write a method which takes two NSString instances one being the message.. the encryption key with the passcode in a way that can be reversed if the passcode is supplied with the encrypted data. The method should then return an NSString created from the encrypted data. I've tried the technique detailed in the first.. the passcode is supplied with the encrypted data. The method should then return an NSString created from the encrypted data. I've tried the technique detailed in the first comment on this post but I've had no luck so far. Apple's CryptoExercise..
Programmatically get own phone number in iOS http://stackoverflow.com/questions/193182/programmatically-get-own-phone-number-in-ios Here's the response from Apple For security reasons iPhone OS restricts an application including its preferences and data to a unique location in the file system. This restriction is part of the security feature known as the application's sandbox...
How to take a screenshot programmatically http://stackoverflow.com/questions/2200736/how-to-take-a-screenshot-programmatically UIGraphicsGetCurrentContext UIImage image UIGraphicsGetImageFromCurrentImageContext UIGraphicsEndImageContext NSData data UIImagePNGRepresentation image data writeToFile @ foo.png atomically YES UPDATE April 2011 for retina display change the.. image UIGraphicsGetImageFromCurrentImageContext UIGraphicsEndImageContext NSData data UIImagePNGRepresentation image data writeToFile @ foo.png atomically YES UPDATE April 2011 for retina display change the first line into this if UIScreen mainScreen..
How do I export UIImage array as a movie? http://stackoverflow.com/questions/3741323/how-do-i-export-uiimage-array-as-a-movie ¦] 3 Write some samples Or you can use AVAssetWriterInputPixelBufferAdaptor. That lets you feed the writer input data from a CVPixelBuffer that ™s quite easy to create from a CGImage. writerInput appendSampleBuffer sampleBuffer 4 Finish the.. pxbuffer NSParameterAssert status kCVReturnSuccess pxbuffer NULL CVPixelBufferLockBaseAddress pxbuffer 0 void pxdata CVPixelBufferGetBaseAddress pxbuffer NSParameterAssert pxdata NULL CGColorSpaceRef rgbColorSpace CGColorSpaceCreateDeviceRGB.. NULL CVPixelBufferLockBaseAddress pxbuffer 0 void pxdata CVPixelBufferGetBaseAddress pxbuffer NSParameterAssert pxdata NULL CGColorSpaceRef rgbColorSpace CGColorSpaceCreateDeviceRGB CGContextRef context CGBitmapContextCreate pxdata frameSize.width..
parsing HTML on the iPhone [closed] http://stackoverflow.com/questions/405749/parsing-html-on-the-iphone a walk on w3school XPath Tutorial to feel comfortable with the XPath language. Code Example #import TFHpple.h NSData data NSData alloc initWithContentsOfFile @ example.html Create parser xpathParser TFHpple alloc initWithHTMLData data Get all.. data NSData alloc initWithContentsOfFile @ example.html Create parser xpathParser TFHpple alloc initWithHTMLData data Get all the cells of the 2nd row of the 3rd table NSArray elements xpathParser searchWithXPathQuery @ table 3 tr 2 td Access.. element elements objectAtIndex 0 Get the text within the cell tag NSString content element content xpathParser release data release Known issues As hpple is a wrapper over XPathQuery which is another wrapper this option probably is not the most..
Delete/Reset all entries in Core Data? http://stackoverflow.com/questions/1077810/delete-reset-all-entries-in-core-data Reset all entries in Core Data Do you know of any way to delete all of the entries stored in Core Data My schema should stay the same I just want to reset.. Reset all entries in Core Data Do you know of any way to delete all of the entries stored in Core Data My schema should stay the same I just want to reset it to blank. Edit I'm looking to do this programmatically so that a.. done programatically at runtime. Update for iOS5 With the introduction of external binary storage allowsExternalBinaryDataStorage or Store in External Record File in iOS 5 and OS X 10.7 simply deleting files pointed by storeURLs is not enough...
Where to place the “Core Data Stack” in a Cocoa/Cocoa Touch application http://stackoverflow.com/questions/1267520/where-to-place-the-core-data-stack-in-a-cocoa-cocoa-touch-application to place the &ldquo Core Data Stack&rdquo in a Cocoa Cocoa Touch application In the iPhone Core Data Template Apple places the Core Data Stack in the.. to place the &ldquo Core Data Stack&rdquo in a Cocoa Cocoa Touch application In the iPhone Core Data Template Apple places the Core Data Stack in the App Delegate. My initial inclination however is to move this code into.. Core Data Stack&rdquo in a Cocoa Cocoa Touch application In the iPhone Core Data Template Apple places the Core Data Stack in the App Delegate. My initial inclination however is to move this code into it's own class whose responsibility..
Use CoreData or SQLite on iPhone? [closed] http://stackoverflow.com/questions/1318467/use-coredata-or-sqlite-on-iphone CoreData or SQLite on iPhone closed Since CoreData has become available for the iPhone in OS 3.0 is it meant to be the answer to.. CoreData or SQLite on iPhone closed Since CoreData has become available for the iPhone in OS 3.0 is it meant to be the answer to data persistence and replace all need for.. all need for direct SQLite What reasons exist to still use SQLite What are advantages disadvantages of SQLite vs. CoreData iphone ios sqlite core data share improve this question This is a common question here Core Data vs. SQLite for SQL..
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 size_t bytesPerRow size_t byteCount size_t pixelCount CGContextRef context CGColorSpaceRef colorSpace UInt8 pixelByteData A pointer to an array of RGBA bytes in memory RPVW_RGBAPixel pixelData The pixel struct with alpha in this version typedef.. CGColorSpaceRef colorSpace UInt8 pixelByteData A pointer to an array of RGBA bytes in memory RPVW_RGBAPixel pixelData The pixel struct with alpha in this version typedef struct RGBAPixel byte red byte green byte blue byte alpha RGBAPixel.. setColorSpace CGColorSpaceCreateDeviceRGB if colorSpace NSLog @ Error allocating color space. return nil self setPixelData malloc byteCount if pixelData NSLog @ Error allocating bitmap memory. Releasing color space. CGColorSpaceRelease colorSpace..
JSON and Core Data on the iPhone http://stackoverflow.com/questions/2362323/json-and-core-data-on-the-iphone and Core Data on the iPhone I have a core data object graph consisting of two entities linked by a to many relationship . I was curious..
How to Sync iPhone Core Data with web server, and then push to other devices? http://stackoverflow.com/questions/5035132/how-to-sync-iphone-core-data-with-web-server-and-then-push-to-other-devices to Sync iPhone Core Data with web server and then push to other devices I have been working on a method to sync core data stored in an iPhone application.. between multiple devices such as an iPad or a Mac. There are not many if any at all sync frameworks for use with Core Data on iOS. However I have been thinking about the following concept A change is made to the local core data store and the change.. I need to be thinking about I have looked at REST frameworks such as ObjectiveResource Core Resource and RestfulCoreData . Of course these are all working with Ruby on Rails which I am not tied to but it's a place to start. The main requirements..
What's the best way to communicate between view controllers? http://stackoverflow.com/questions/569940/whats-the-best-way-to-communicate-between-view-controllers serious of slides http cs193p.stanford.edu downloads 08 NavigationTabBarControllers.pdf Page 16 51 How Not To Share Data Global Variables or singletons This includes your application delegate Direct dependencies make your code less reusable.. methods. Fair 'nuff. A bit further on we get this slide telling us what we should do. Page 18 51 Best Practices for Data Flow Figure out exactly what needs to be communicated Define input parameters for your view controller For communicating..
iPhone Data Usage Tracking/Monitoring http://stackoverflow.com/questions/7946699/iphone-data-usage-tracking-monitoring Data Usage Tracking Monitoring I've searched over this topic but found very few details which were helpful. With these details.. details shared in this post with other posts before marking this as DUPLICATE and not just by the subject. NSArray getDataCountersForType int type BOOL success struct ifaddrs addrs nil const struct ifaddrs cursor nil const struct sockaddr_dl dlAddr.. if_iobytes values still come because this method provides network bytes exchanges and not just internet . NSArray getDataCounters BOOL success struct ifaddrs addrs const struct ifaddrs cursor const struct if_data networkStatisc int WiFiSent 0..
How to reloadData in tableView with didSelectedRowAtIndexPath and call group of methods in it http://stackoverflow.com/questions/19952691/how-to-reloaddata-in-tableview-with-didselectedrowatindexpath-and-call-group-of error userInfo objectForKey NSURLErrorFailingURLStringErrorKey NSLog @ @ errorString errorString release GET FULL DATA HERE void connectionDidFinishLoading NSURLConnection connection NSString dataString NSString alloc initWithData _receivedData..
Installing a configuration profile on iPhone - programmatically http://stackoverflow.com/questions/2338035/installing-a-configuration-profile-on-iphone-programmatically UIWebView works as expected... EDIT2 tried feeding a data URL to Safari via openURL does not work see here iPhone Open DATA Url In Safari EDIT3 found a lot of info on how Safari does not support file URLs. UIWebView however very much does. Also..
http://stackoverflow.com/questions/3499663/sending-post-data-from-iphone
http://stackoverflow.com/questions/4772341/is-it-possible-for-a-uiwebview-to-save-and-autofill-previously-entered-form-valu UPDATE Following Michael's basic model see accepted answer I was able to get this done. Here's what I did SETTING DATA BOOL webView UIWebView webView shouldStartLoadWithRequest NSURLRequest request navigationType UIWebViewNavigationType navigationType.. storeUsername username andPassword password forServiceName @ MyService updateExisting YES error nil GETTING DATA void webViewDidFinishLoad UIWebView webView verify view is on the login page of the site simplified NSURL requestURL self.webView.request..
Tap pressure strength detection using accelerometer http://stackoverflow.com/questions/5179426/tap-pressure-strength-detection-using-accelerometer OR CONSEQUENTIAL DAMAGES INCLUDING BUT NOT LIMITED TO PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES LOSS OF USE DATA OR PROFITS OR BUSINESS INTERRUPTION HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY WHETHER IN CONTRACT STRICT LIABILITY OR.. OR CONSEQUENTIAL DAMAGES INCLUDING BUT NOT LIMITED TO PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES LOSS OF USE DATA OR PROFITS OR BUSINESS INTERRUPTION HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY WHETHER IN CONTRACT STRICT LIABILITY OR..
Memory leak problem and i need help #1 http://stackoverflow.com/questions/5696471/memory-leak-problem-and-i-need-help-1 int questionNr NSMutableArray read_Question NSMutableArray alloc initWithCapacity 0 NSError error PREPARE CORE DATA DB if managedObjectContext nil managedObjectContext FamQuiz_R0_1AppDelegate UIApplication sharedApplication delegate managedObjectContext..
About geting transaction id from paypal in iphone http://stackoverflow.com/questions/7482965/about-geting-transaction-id-from-paypal-in-iphone forHTTPHeaderField @ X PAYPAL SECURITY SIGNATURE theRequest addValue @ NV forHTTPHeaderField @ X PAYPAL REQUEST DATA FORMAT theRequest addValue @ NV forHTTPHeaderField @ X PAYPAL RESPONSE DATA FORMAT theRequest addValue app_id forHTTPHeaderField.. @ NV forHTTPHeaderField @ X PAYPAL REQUEST DATA FORMAT theRequest addValue @ NV forHTTPHeaderField @ X PAYPAL RESPONSE DATA FORMAT theRequest addValue app_id forHTTPHeaderField @ X PAYPAL APPLICATION ID theRequest setHTTPBody parameterString dataUsingEncoding..
Array nil (even when addObject:) [duplicate] http://stackoverflow.com/questions/8569495/array-nil-even-when-addobject count Favourites A CLASS ON TAB BAR CONTROLLER WEBVIEWCONROLLER CONTROLLER FOR DIFFERENT WEB VIEWS LISTVIEWCONTROLLER DATA PROVIDER Actually what happens is when i shake i reload the table view data and i add an object to an array array of favorites..
http://stackoverflow.com/questions/8706828/application-windows-are-expected-to-have-a-root-view-controller-at-the-end-of-a application didFinishLaunchingWithOptions NSDictionary launchOptions some dropbox setup stuff INIT VIEW AND CORE DATA RootViewController rootViewController RootViewController alloc initWithNibName @ RootViewController bundle nil NSManagedObjectContext..
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