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2014/10/15 ¤U¤È 10:03:50
iphone Programming Glossary: appropriateRemove all but numbers from NSString http://stackoverflow.com/questions/1129521/remove-all-but-numbers-from-nsstring
Any quick and dirty anti-aliasing techniques for a rotated UIImageView? http://stackoverflow.com/questions/1136110/any-quick-and-dirty-anti-aliasing-techniques-for-a-rotated-uiimageview cocoa touch uiimageview uiimage antialiasing share improve this question Remember to set the appropriate anti alias options CGContextSetAllowsAntialiasing theContext true CGContextSetShouldAntialias theContext..
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 documentation you might want to use a different context to perform a discrete set of actions. The appropriate unit of currency for a view controller is therefore usually a managed object context otherwise a managed..
How to call Objective-C from Javascript? http://stackoverflow.com/questions/1662473/how-to-call-objective-c-from-javascript delegate method look for these fake URLs extract the information you need take whatever action is appropriate and return NO to cancel the navigation. It's probably best if you defer any lengthy processing using..
iPhone image stretching (skew) http://stackoverflow.com/questions/2351586/iphone-image-stretching-skew so you could cheat by using the transform P . . Q x x' . R . S y y' . . 1 . z z' . T . U 1 w' with appropriate P Q R S T U that maps the 4 points to the expected locations. 6 unique coordinates and 6 variables should..
http://stackoverflow.com/questions/2496554/easiest-way-to-support-multiple-orientations-how-do-i-load-a-custom-nib-when-th NO The app starts in portrait. If the orientation of the device is landscape it pushes the appropriate landscapes. When the device rotates back to portrait it pops the landscape. To the user it looks like..
How do I associate file types with an iPhone application? http://stackoverflow.com/questions/2774343/how-do-i-associate-file-types-with-an-iphone-application types. There is a lot of talk in the documentation about how to set up your app to launch other appropriate apps when it encounters an unknown file type. This means the association doesn't work out of the box..
http://stackoverflow.com/questions/3097244/exit-application-in-ios-4-0 of apps that had calls to exit in them in the past. Exiting instead of suspending by setting the appropriate key in the Info.plist file is perfectly fine of course but that's not a dedicated UI Button just application..
Proper way to exit iPhone application? http://stackoverflow.com/questions/355168/proper-way-to-exit-iphone-application it to exit due to certain user actions. After cleaning up memory the app allocated what's the appropriate method to call to terminate the application iphone objective c cocoa touch ipad share improve this..
Fast and Lean PDF Viewer for iPhone / iPad / iOs - tips and hints? http://stackoverflow.com/questions/3889634/fast-and-lean-pdf-viewer-for-iphone-ipad-ios-tips-and-hints are issued. Whenever the user start zooming I acquire the CGPDFPage and render it using the appropriate CTM. The code in void drawLayer CALayer layer inContext CGContextRef context is like CGAffineTransform..
How to customize the background/border colors of a grouped table view cell? http://stackoverflow.com/questions/400965/how-to-customize-the-background-border-colors-of-a-grouped-table-view-cell backgroundView property to a custom UIView that draws the border and background itself in the appropriate colors. This view needs to be able to draw the borders in 4 different modes rounded on the top for the.. to bother drawing rounded corners so we return At this point the clip rect is set to only draw the appropriate corners so we fill and stroke a rounded rect taking the entire rect CGContextBeginPath c addRoundedRectToPath..
iOS SDK - Programmatically generate a PDF file http://stackoverflow.com/questions/4362734/ios-sdk-programmatically-generate-a-pdf-file UIView class return view return nil I then fill in various elements. I used tags to find the appropriate elements but you could do this other ways. Example UILabel label UILabel templateView viewWithTag TAG_FIRST_NAME..
How to filter NSFetchedResultsController (CoreData) with UISearchDisplayController/UISearchBar http://stackoverflow.com/questions/4471289/how-to-filter-nsfetchedresultscontroller-coredata-with-uisearchdisplaycontroll for the entity. NSFetchRequest fetchRequest NSFetchRequest alloc init Edit the entity name as appropriate. NSEntityDescription callEntity MTCall entityInManagedObjectContext self.managedObjectContext fetchRequest.. fetchRequest setSortDescriptors sortDescriptors Edit the section name key path and cache name if appropriate. nil for section name key path means no sections . NSFetchedResultsController aFetchedResultsController.. performFetch error Replace this implementation with code to handle the error appropriately. abort causes the application to generate a crash log and terminate. You should not use this function..
Lazy load images in UITableViewCell http://stackoverflow.com/questions/531482/lazy-load-images-in-uitableviewcell you need your background image loading thread to go retrieve it. Otherwise you will get back the appropriate image for your table cell to display. On a memory warning you could clear out this cache of images with..
What's the best way to communicate between view controllers? http://stackoverflow.com/questions/569940/whats-the-best-way-to-communicate-between-view-controllers with the previous answers which focus on the importance of putting data in model objects when appropriate per the MVC design pattern . Usually you want to avoid putting state information inside a controller..
How do I create delegates in Objective-C? http://stackoverflow.com/questions/626898/how-do-i-create-delegates-in-objective-c see if the delegate responds to the windowDidMove message using respondsToSelector and send it if appropriate. if self delegate respondsToSelector @selector windowDidMove self delegate windowDidMove notification..
Has anyone implemented the PayPal API through a native iPhone app? http://stackoverflow.com/questions/779423/has-anyone-implemented-the-paypal-api-through-a-native-iphone-app method that creates an HTTP POST to send to Paypal and makes an NSURLRequest. You can fill in the appropriate string format variables. I used HTTP Client to check what I was doing. void sendPayPalRequestPOST perfomingSetMobileCheckout..
Remove all but numbers from NSString http://stackoverflow.com/questions/1129521/remove-all-but-numbers-from-nsstring
Any quick and dirty anti-aliasing techniques for a rotated UIImageView? http://stackoverflow.com/questions/1136110/any-quick-and-dirty-anti-aliasing-techniques-for-a-rotated-uiimageview
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 if needs be. Moreover in some situations as described in the documentation you might want to use a different context to perform a discrete set of actions. The appropriate unit of currency for a view controller is therefore usually a managed object context otherwise a managed object. Using and passing a singleton object that manages..
How to call Objective-C from Javascript? http://stackoverflow.com/questions/1662473/how-to-call-objective-c-from-javascript fake myApp something_happened param1 param2 param3 In your delegate method look for these fake URLs extract the information you need take whatever action is appropriate and return NO to cancel the navigation. It's probably best if you defer any lengthy processing using some flavor of performSelector . share improve this answer..
iPhone image stretching (skew) http://stackoverflow.com/questions/2351586/iphone-image-stretching-skew projection if CA follows usual 3D compute graphics rules so you could cheat by using the transform P . . Q x x' . R . S y y' . . 1 . z z' . T . U 1 w' with appropriate P Q R S T U that maps the 4 points to the expected locations. 6 unique coordinates and 6 variables should have exactly 1 solution most of the cases. When you have..
http://stackoverflow.com/questions/2496554/easiest-way-to-support-multiple-orientations-how-do-i-load-a-custom-nib-when-th UIInterfaceOrientationPortrait self.nav popViewControllerAnimated NO The app starts in portrait. If the orientation of the device is landscape it pushes the appropriate landscapes. When the device rotates back to portrait it pops the landscape. To the user it looks like the same view reorganizing itself for a different orientation...
How do I associate file types with an iPhone application? http://stackoverflow.com/questions/2774343/how-do-i-associate-file-types-with-an-iphone-application goes a step further and allows apps to associate with file types. There is a lot of talk in the documentation about how to set up your app to launch other appropriate apps when it encounters an unknown file type. This means the association doesn't work out of the box for any app like the URL protocol registering did. This leads..
http://stackoverflow.com/questions/3097244/exit-application-in-ios-4-0 Don't Quit Programmatically . And we have seen many reports of apps that had calls to exit in them in the past. Exiting instead of suspending by setting the appropriate key in the Info.plist file is perfectly fine of course but that's not a dedicated UI Button just application specific implementation of program exit by the home..
Proper way to exit iPhone application? http://stackoverflow.com/questions/355168/proper-way-to-exit-iphone-application application I am programming an iPhone app and I need to force it to exit due to certain user actions. After cleaning up memory the app allocated what's the appropriate method to call to terminate the application iphone objective c cocoa touch ipad share improve this question Have you tried exit 0 Alternatively NSThread mainThread..
Fast and Lean PDF Viewer for iPhone / iPad / iOs - tips and hints? http://stackoverflow.com/questions/3889634/fast-and-lean-pdf-viewer-for-iphone-ipad-ios-tips-and-hints 1. Those tiles will be released automatically when memory warnings are issued. Whenever the user start zooming I acquire the CGPDFPage and render it using the appropriate CTM. The code in void drawLayer CALayer layer inContext CGContextRef context is like CGAffineTransform currentCTM CGContextGetCTM context if currentCTM.a 1.0 baseImage..
How to customize the background/border colors of a grouped table view cell? http://stackoverflow.com/questions/400965/how-to-customize-the-background-border-colors-of-a-grouped-table-view-cell this when I had to do it You need to set the UITableViewCell's backgroundView property to a custom UIView that draws the border and background itself in the appropriate colors. This view needs to be able to draw the borders in 4 different modes rounded on the top for the first cell in a section rounded on the bottom for the last.. c rect.size.width 0.0f CGContextStrokePath c return no need to bother drawing rounded corners so we return At this point the clip rect is set to only draw the appropriate corners so we fill and stroke a rounded rect taking the entire rect CGContextBeginPath c addRoundedRectToPath c rect 10.0f 10.0f CGContextFillPath c CGContextSetLineWidth..
iOS SDK - Programmatically generate a PDF file http://stackoverflow.com/questions/4362734/ios-sdk-programmatically-generate-a-pdf-file owner self options nil for id view in nib if view isKindOfClass UIView class return view return nil I then fill in various elements. I used tags to find the appropriate elements but you could do this other ways. Example UILabel label UILabel templateView viewWithTag TAG_FIRST_NAME if label nil label.text firstName nil firstName..
How to filter NSFetchedResultsController (CoreData) with UISearchDisplayController/UISearchBar http://stackoverflow.com/questions/4471289/how-to-filter-nsfetchedresultscontroller-coredata-with-uisearchdisplaycontroll Set up the fetched results controller. Create the fetch request for the entity. NSFetchRequest fetchRequest NSFetchRequest alloc init Edit the entity name as appropriate. NSEntityDescription callEntity MTCall entityInManagedObjectContext self.managedObjectContext fetchRequest setEntity callEntity NSMutableArray predicateArray NSMutableArray.. size to a suitable number. fetchRequest setFetchBatchSize 20 fetchRequest setSortDescriptors sortDescriptors Edit the section name key path and cache name if appropriate. nil for section name key path means no sections . NSFetchedResultsController aFetchedResultsController NSFetchedResultsController alloc initWithFetchRequest fetchRequest.. self fetchRequest release NSError error nil if aFetchedResultsController performFetch error Replace this implementation with code to handle the error appropriately. abort causes the application to generate a crash log and terminate. You should not use this function in a shipping application although it may be useful during..
Lazy load images in UITableViewCell http://stackoverflow.com/questions/531482/lazy-load-images-in-uitableviewcell nil that means that the image is missing from the cache and you need your background image loading thread to go retrieve it. Otherwise you will get back the appropriate image for your table cell to display. On a memory warning you could clear out this cache of images with no adverse effects aside from forcing them to be reloaded..
What's the best way to communicate between view controllers? http://stackoverflow.com/questions/569940/whats-the-best-way-to-communicate-between-view-controllers do it right instead of just hacking it together. First I agree with the previous answers which focus on the importance of putting data in model objects when appropriate per the MVC design pattern . Usually you want to avoid putting state information inside a controller unless it's strictly presentation data. Second see page 10..
How do I create delegates in Objective-C? http://stackoverflow.com/questions/626898/how-do-i-create-delegates-in-objective-c On the NSWindow side it probably has code similar to this to see if the delegate responds to the windowDidMove message using respondsToSelector and send it if appropriate. if self delegate respondsToSelector @selector windowDidMove self delegate windowDidMove notification The delegate property itself is typically declared weak in..
Has anyone implemented the PayPal API through a native iPhone app? http://stackoverflow.com/questions/779423/has-anyone-implemented-the-paypal-api-through-a-native-iphone-app I figured this out after some heavy API research. Below is a method that creates an HTTP POST to send to Paypal and makes an NSURLRequest. You can fill in the appropriate string format variables. I used HTTP Client to check what I was doing. void sendPayPalRequestPOST perfomingSetMobileCheckout YES recordResults FALSE NSString parameterString..
Remove all but numbers from NSString http://stackoverflow.com/questions/1129521/remove-all-but-numbers-from-nsstring
Any quick and dirty anti-aliasing techniques for a rotated UIImageView? http://stackoverflow.com/questions/1136110/any-quick-and-dirty-anti-aliasing-techniques-for-a-rotated-uiimageview background. iphone cocoa touch uiimageview uiimage antialiasing share improve this question Remember to set the appropriate anti alias options CGContextSetAllowsAntialiasing theContext true CGContextSetShouldAntialias theContext true share improve..
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 as described in the documentation you might want to use a different context to perform a discrete set of actions. The appropriate unit of currency for a view controller is therefore usually a managed object context otherwise a managed object. Using and..
How to call Objective-C from Javascript? http://stackoverflow.com/questions/1662473/how-to-call-objective-c-from-javascript param3 In your delegate method look for these fake URLs extract the information you need take whatever action is appropriate and return NO to cancel the navigation. It's probably best if you defer any lengthy processing using some flavor of performSelector..
iPhone image stretching (skew) http://stackoverflow.com/questions/2351586/iphone-image-stretching-skew graphics rules so you could cheat by using the transform P . . Q x x' . R . S y y' . . 1 . z z' . T . U 1 w' with appropriate P Q R S T U that maps the 4 points to the expected locations. 6 unique coordinates and 6 variables should have exactly 1..
http://stackoverflow.com/questions/2496554/easiest-way-to-support-multiple-orientations-how-do-i-load-a-custom-nib-when-th popViewControllerAnimated NO The app starts in portrait. If the orientation of the device is landscape it pushes the appropriate landscapes. When the device rotates back to portrait it pops the landscape. To the user it looks like the same view reorganizing..
How do I associate file types with an iPhone application? http://stackoverflow.com/questions/2774343/how-do-i-associate-file-types-with-an-iphone-application to associate with file types. There is a lot of talk in the documentation about how to set up your app to launch other appropriate apps when it encounters an unknown file type. This means the association doesn't work out of the box for any app like the..
http://stackoverflow.com/questions/3097244/exit-application-in-ios-4-0 seen many reports of apps that had calls to exit in them in the past. Exiting instead of suspending by setting the appropriate key in the Info.plist file is perfectly fine of course but that's not a dedicated UI Button just application specific implementation..
Proper way to exit iPhone application? http://stackoverflow.com/questions/355168/proper-way-to-exit-iphone-application app and I need to force it to exit due to certain user actions. After cleaning up memory the app allocated what's the appropriate method to call to terminate the application iphone objective c cocoa touch ipad share improve this question Have you..
Fast and Lean PDF Viewer for iPhone / iPad / iOs - tips and hints? http://stackoverflow.com/questions/3889634/fast-and-lean-pdf-viewer-for-iphone-ipad-ios-tips-and-hints when memory warnings are issued. Whenever the user start zooming I acquire the CGPDFPage and render it using the appropriate CTM. The code in void drawLayer CALayer layer inContext CGContextRef context is like CGAffineTransform currentCTM CGContextGetCTM..
How to customize the background/border colors of a grouped table view cell? http://stackoverflow.com/questions/400965/how-to-customize-the-background-border-colors-of-a-grouped-table-view-cell the UITableViewCell's backgroundView property to a custom UIView that draws the border and background itself in the appropriate colors. This view needs to be able to draw the borders in 4 different modes rounded on the top for the first cell in a section.. c return no need to bother drawing rounded corners so we return At this point the clip rect is set to only draw the appropriate corners so we fill and stroke a rounded rect taking the entire rect CGContextBeginPath c addRoundedRectToPath c rect 10.0f..
iOS SDK - Programmatically generate a PDF file http://stackoverflow.com/questions/4362734/ios-sdk-programmatically-generate-a-pdf-file if view isKindOfClass UIView class return view return nil I then fill in various elements. I used tags to find the appropriate elements but you could do this other ways. Example UILabel label UILabel templateView viewWithTag TAG_FIRST_NAME if label..
How to filter NSFetchedResultsController (CoreData) with UISearchDisplayController/UISearchBar http://stackoverflow.com/questions/4471289/how-to-filter-nsfetchedresultscontroller-coredata-with-uisearchdisplaycontroll Create the fetch request for the entity. NSFetchRequest fetchRequest NSFetchRequest alloc init Edit the entity name as appropriate. NSEntityDescription callEntity MTCall entityInManagedObjectContext self.managedObjectContext fetchRequest setEntity callEntity.. setFetchBatchSize 20 fetchRequest setSortDescriptors sortDescriptors Edit the section name key path and cache name if appropriate. nil for section name key path means no sections . NSFetchedResultsController aFetchedResultsController NSFetchedResultsController.. error nil if aFetchedResultsController performFetch error Replace this implementation with code to handle the error appropriately. abort causes the application to generate a crash log and terminate. You should not use this function in a shipping application..
Lazy load images in UITableViewCell http://stackoverflow.com/questions/531482/lazy-load-images-in-uitableviewcell from the cache and you need your background image loading thread to go retrieve it. Otherwise you will get back the appropriate image for your table cell to display. On a memory warning you could clear out this cache of images with no adverse effects..
What's the best way to communicate between view controllers? http://stackoverflow.com/questions/569940/whats-the-best-way-to-communicate-between-view-controllers together. First I agree with the previous answers which focus on the importance of putting data in model objects when appropriate per the MVC design pattern . Usually you want to avoid putting state information inside a controller unless it's strictly..
How do I create delegates in Objective-C? http://stackoverflow.com/questions/626898/how-do-i-create-delegates-in-objective-c similar to this to see if the delegate responds to the windowDidMove message using respondsToSelector and send it if appropriate. if self delegate respondsToSelector @selector windowDidMove self delegate windowDidMove notification The delegate property..
Has anyone implemented the PayPal API through a native iPhone app? http://stackoverflow.com/questions/779423/has-anyone-implemented-the-paypal-api-through-a-native-iphone-app research. Below is a method that creates an HTTP POST to send to Paypal and makes an NSURLRequest. You can fill in the appropriate string format variables. I used HTTP Client to check what I was doing. void sendPayPalRequestPOST perfomingSetMobileCheckout..
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