2014/10/15 下午 10:05:46

iphone Programming Glossary: creation

UIScrollView. Any thoughts on implementing “infinite” scroll/zoom?

http://stackoverflow.com/questions/1493950/uiscrollview-any-thoughts-on-implementing-infinite-scroll-zoom

with a UIScrollView but there are two fundamental impediments 1 scrollView.contentSize is fixed at creation time. 2 zooming can blow any lazy loading scheme all to hell since it can cause infinte data explosion...

Detecting which UIButton was pressed in a UITableView

http://stackoverflow.com/questions/1802707/detecting-which-uibutton-was-pressed-in-a-uitableview

UIButton sender int row button.tag What's important to note is that I can't set the tag in the creation of the cell since the cell might be dequeued instead. It feels very dirty. There must be a better way...

Implementation of “Automatic Lightweight Migration” for Core Data (iPhone)

http://stackoverflow.com/questions/2310216/implementation-of-automatic-lightweight-migration-for-core-data-iphone

Store options for automatic migration in the app delegate. Change your persistentStoreCoordinator creation to this replace YOURDB NSPersistentStoreCoordinator persistentStoreCoordinator if persistentStoreCoordinator..

Objective-C categories in static library

http://stackoverflow.com/questions/2567498/objective-c-categories-in-static-library

executable due to additional object code loaded into the application it will allow the successful creation of effective Objective C static libraries that contain categories on existing classes. and there is..

How to filter NSFetchedResultsController (CoreData) with UISearchDisplayController/UISearchBar

http://stackoverflow.com/questions/4471289/how-to-filter-nsfetchedresultscontroller-coredata-with-uisearchdisplaycontroll

self.searchDisplayController.searchBar setText savedSearchTerm self.savedSearchTerm nil FRC creation code NSFetchedResultsController newFetchedResultsControllerWithSearch NSString searchString NSArray..

How to change UIPickerView height

http://stackoverflow.com/questions/573979/how-to-change-uipickerview-height

a change in the height of the view by taking complete control and passing a desired frame size at creation time e.g smallerPicker UIPickerView alloc initWithFrame CGRectMake 0.0 0.0 320.0 120.0 You will discover..

Example or explanation of Core Data Migration with multiple passes?

http://stackoverflow.com/questions/5995231/example-or-explanation-of-core-data-migration-with-multiple-passes

migration delete the old and rename the new one. I did some changes to the data model after the creation of the mapping models this resulted in some compatibility errors which I could only solve with recreating..

Understanding reference counting with Cocoa and Objective-C

http://stackoverflow.com/questions/6578/understanding-reference-counting-with-cocoa-and-objective-c

on the object when I'm done with it. If I don't there will be a memory leak. Example of object creation NSString s NSString alloc init Ref count is 1 s retain Ref count is 2 silly to do this after init.. have to and in fact we shouldn't . What's important to note is that again by convention all object creation class methods return an autoreleased object. For example in the following example the variable s has..

Customize the MKAnnotationView callout

http://stackoverflow.com/questions/8018841/customize-the-mkannotationview-callout

content ... The Annotation implements AnnotationProtocol to announce it wants to handle the creation of its own MKAnnotationView. That is your MKMapViewDelegate should have code like this MKAnnotationView..

UIScrollView. Any thoughts on implementing “infinite” scroll/zoom?

http://stackoverflow.com/questions/1493950/uiscrollview-any-thoughts-on-implementing-infinite-scroll-zoom

for a looonnnggg time. I would like to mimic this behavior with a UIScrollView but there are two fundamental impediments 1 scrollView.contentSize is fixed at creation time. 2 zooming can blow any lazy loading scheme all to hell since it can cause infinte data explosion. Have others out there pondered this idea Yah I know we are..

Detecting which UIButton was pressed in a UITableView

http://stackoverflow.com/questions/1802707/detecting-which-uibutton-was-pressed-in-a-uitableview

return cell void buttonPressedAction id sender UIButton button UIButton sender int row button.tag What's important to note is that I can't set the tag in the creation of the cell since the cell might be dequeued instead. It feels very dirty. There must be a better way. iphone uitableview uitableviewcell share improve this..

Implementation of “Automatic Lightweight Migration” for Core Data (iPhone)

http://stackoverflow.com/questions/2310216/implementation-of-automatic-lightweight-migration-for-core-data-iphone

coredata automatic light migration 1. Set the Persistent Store options for automatic migration in the app delegate. Change your persistentStoreCoordinator creation to this replace YOURDB NSPersistentStoreCoordinator persistentStoreCoordinator if persistentStoreCoordinator nil return persistentStoreCoordinator NSURL storeUrl..

Objective-C categories in static library

http://stackoverflow.com/questions/2567498/objective-c-categories-in-static-library

While this option will typically result in a larger executable due to additional object code loaded into the application it will allow the successful creation of effective Objective C static libraries that contain categories on existing classes. and there is also recommendation in iPhone Development FAQ How do I link..

How to filter NSFetchedResultsController (CoreData) with UISearchDisplayController/UISearchBar

http://stackoverflow.com/questions/4471289/how-to-filter-nsfetchedresultscontroller-coredata-with-uisearchdisplaycontroll

setSelectedScopeButtonIndex self.savedScopeButtonIndex self.searchDisplayController.searchBar setText savedSearchTerm self.savedSearchTerm nil FRC creation code NSFetchedResultsController newFetchedResultsControllerWithSearch NSString searchString NSArray sortDescriptors your sort descriptors here NSPredicate filterPredicate..

How to change UIPickerView height

http://stackoverflow.com/questions/573979/how-to-change-uipickerview-height

of the UIPickerView but I have found that you can achieve a change in the height of the view by taking complete control and passing a desired frame size at creation time e.g smallerPicker UIPickerView alloc initWithFrame CGRectMake 0.0 0.0 320.0 120.0 You will discover that at various heights and widths there are visual glitches...

Example or explanation of Core Data Migration with multiple passes?

http://stackoverflow.com/questions/5995231/example-or-explanation-of-core-data-migration-with-multiple-passes

Understanding reference counting with Cocoa and Objective-C

http://stackoverflow.com/questions/6578/understanding-reference-counting-with-cocoa-and-objective-c

either of these cases it is my responsibility to call release on the object when I'm done with it. If I don't there will be a memory leak. Example of object creation NSString s NSString alloc init Ref count is 1 s retain Ref count is 2 silly to do this after init s release Ref count is back to 1 s release Ref count is.. it takes care of calling release for us so we don't have to and in fact we shouldn't . What's important to note is that again by convention all object creation class methods return an autoreleased object. For example in the following example the variable s has a reference count of 1 but after the event loop completes it..

Customize the MKAnnotationView callout

http://stackoverflow.com/questions/8018841/customize-the-mkannotationview-callout

MKAnnotation AnnotationProtocol id initWithContent Content content ... The Annotation implements AnnotationProtocol to announce it wants to handle the creation of its own MKAnnotationView. That is your MKMapViewDelegate should have code like this MKAnnotationView mapView MKMapView aMapView viewForAnnotation id MKAnnotation..

How to get the color of a pixel in an UIView?

http://stackoverflow.com/questions/1160229/how-to-get-the-color-of-a-pixel-in-an-uiview

images involves rendering them into a context anyway so you can merge that with this and factor out the actual image creation. So if you take that could and remove the bit where you load the image and replace it with the context render view.layer..

UIScrollView. Any thoughts on implementing “infinite” scroll/zoom?

http://stackoverflow.com/questions/1493950/uiscrollview-any-thoughts-on-implementing-infinite-scroll-zoom

mimic this behavior with a UIScrollView but there are two fundamental impediments 1 scrollView.contentSize is fixed at creation time. 2 zooming can blow any lazy loading scheme all to hell since it can cause infinte data explosion. Have others out..

Get directory contents in date modified order

http://stackoverflow.com/questions/1523793/get-directory-contents-in-date-modified-order

documentsPath error &error if error nil NSLog @ Error in reading files @ error localizedDescription return sort by creation date NSMutableArray filesAndProperties NSMutableArray arrayWithCapacity filesArray count for NSString file in filesArray..

Detecting which UIButton was pressed in a UITableView

http://stackoverflow.com/questions/1802707/detecting-which-uibutton-was-pressed-in-a-uitableview

sender UIButton button UIButton sender int row button.tag What's important to note is that I can't set the tag in the creation of the cell since the cell might be dequeued instead. It feels very dirty. There must be a better way. iphone uitableview..

How to implement an accordion view for an iPhone SDK app?

http://stackoverflow.com/questions/1944428/how-to-implement-an-accordion-view-for-an-iphone-sdk-app

like with it. I've tried this out and it works. You can then complete it by adding the other content to your cell creation code to add whatever you'd like to a section including possibly a scrolling UITextView if you'd like . share improve this..

Implementation of “Automatic Lightweight Migration” for Core Data (iPhone)

http://stackoverflow.com/questions/2310216/implementation-of-automatic-lightweight-migration-for-core-data-iphone

Set the Persistent Store options for automatic migration in the app delegate. Change your persistentStoreCoordinator creation to this replace YOURDB NSPersistentStoreCoordinator persistentStoreCoordinator if persistentStoreCoordinator nil return..

How does undo/redo basically work on iPhone OS?

http://stackoverflow.com/questions/2449268/how-does-undo-redo-basically-work-on-iphone-os

will undo edits to those properties. Core Data is not needed for undo but it makes it much much easier. It handles the creation of these undo actions for you every time you edit your data model including complex actions like a cascading delete down..

Objective-C categories in static library

http://stackoverflow.com/questions/2567498/objective-c-categories-in-static-library

result in a larger executable due to additional object code loaded into the application it will allow the successful creation of effective Objective C static libraries that contain categories on existing classes. and there is also recommendation..

Add UIView Above All Other Views, Including StatusBar

http://stackoverflow.com/questions/2666792/add-uiview-above-all-other-views-including-statusbar

can then add your custom subviews to this window. Note that Apple does not encourage but neither do they prohibit the creation of multiple windows. UIWindow statusWindow UIWindow alloc initWithFrame UIScreen mainScreen bounds statusWindow.windowLevel..

How to filter NSFetchedResultsController (CoreData) with UISearchDisplayController/UISearchBar

http://stackoverflow.com/questions/4471289/how-to-filter-nsfetchedresultscontroller-coredata-with-uisearchdisplaycontroll

Non-retaining array for delegates

http://stackoverflow.com/questions/4692161/non-retaining-array-for-delegates

this bit of code awhile ago can't remember who to attribute it to . It's quite ingenius using a Category to allow the creation of a mutable array that does no retain release by backing it with a CFArray with proper callbacks. @implementation NSMutableArray..

NSMutableString as retain/copy

http://stackoverflow.com/questions/4995254/nsmutablestring-as-retain-copy

if it is in fact immutable. in order to guarantee that you're dealing with an immutable string you simply copy at creation and set. If yes can I just replace retain to copy in my app and remove the release in dealloc copy like retain returns an..

How to create subscript characters that's not in Unicode in iOS

http://stackoverflow.com/questions/5080175/how-to-create-subscript-characters-thats-not-in-unicode-in-ios

subscripted character exists in Unicode already subscript and superscript is created on string rendering not on string creation. And this is not a limitation of iOS this is the limitation of the way strings are processed in modern computers. What do..

How to change UIPickerView height

http://stackoverflow.com/questions/573979/how-to-change-uipickerview-height

that you can achieve a change in the height of the view by taking complete control and passing a desired frame size at creation time e.g smallerPicker UIPickerView alloc initWithFrame CGRectMake 0.0 0.0 320.0 120.0 You will discover that at various..

Example or explanation of Core Data Migration with multiple passes?

http://stackoverflow.com/questions/5995231/example-or-explanation-of-core-data-migration-with-multiple-passes

can after successful migration delete the old and rename the new one. I did some changes to the data model after the creation of the mapping models this resulted in some compatibility errors which I could only solve with recreating the mapping models...

Understanding reference counting with Cocoa and Objective-C

http://stackoverflow.com/questions/6578/understanding-reference-counting-with-cocoa-and-objective-c

to call release on the object when I'm done with it. If I don't there will be a memory leak. Example of object creation NSString s NSString alloc init Ref count is 1 s retain Ref count is 2 silly to do this after init s release Ref count.. for us so we don't have to and in fact we shouldn't . What's important to note is that again by convention all object creation class methods return an autoreleased object. For example in the following example the variable s has a reference count of..

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

settings etc which may be reused by multiple projects. However Apple does not seem to support custom framework creation for iPhone OS. Bundles http developer.apple.com iphone library documentation CoreFoundation Conceptual CFBundles CFBundles.html..

How to show and edit existing PDF files in ios application

http://stackoverflow.com/questions/7644340/how-to-show-and-edit-existing-pdf-files-in-ios-application

method named secondPart though I called it for some more data to append to that file. Once I fill I've done with the creation I need to call endContext of PDFCreator class that will complete the pdf generation and yes I will have the updated file...

Customize the MKAnnotationView callout

http://stackoverflow.com/questions/8018841/customize-the-mkannotationview-callout

id initWithContent Content content ... The Annotation implements AnnotationProtocol to announce it wants to handle the creation of its own MKAnnotationView. That is your MKMapViewDelegate should have code like this MKAnnotationView mapView MKMapView..

iPhone Dev - NSString Creation

http://stackoverflow.com/questions/1210319/iphone-dev-nsstring-creation

Dev NSString Creation I'm really confused with NSStrings. Like when should I do NSString aString @ Hello of should it be NSString aString NSString..

How can i create a PDF file programmatically in an iphone application?

http://stackoverflow.com/questions/1360912/how-can-i-create-a-pdf-file-programmatically-in-an-iphone-application

What are the correct pixel dimensions for an apple-touch-icon?

http://stackoverflow.com/questions/1598/what-are-the-correct-pixel-dimensions-for-an-apple-touch-icon

we need to provide both a 57x57 and a 114x114 image now as well as a 640x960 title image. See Custom Icon and Image Creation Guidelines Javascript required which is part of a whole document iOS Human Interface Guidelines 2013 by Apple Inc PDF 26..

Do I programatically add SubViews in ViewDidAppear, ViewDidLoad, ViewWillAppear, the constructor?

http://stackoverflow.com/questions/2280423/do-i-programatically-add-subviews-in-viewdidappear-viewdidload-viewwillappear

data on the form. So for the example above I would use this to actually load the data from my domain into the form. Creation of UIViews is fairly expensive and you should avoid as much as possible doing that on the ViewWillAppear method becuase..

iOS SDK - Programmatically generate a PDF file

http://stackoverflow.com/questions/4362734/ios-sdk-programmatically-generate-a-pdf-file

know if there are any good PDF tutorials around for the iOS SDK maybe a drop in library. I've seen this tutorial PDF Creation Tutorial but it was mostly written in C. Looking for more Objective C style. This also seems like a ridiculous way to write..

What is the difference between -viewWillAppear: and -viewDidAppear:?

http://stackoverflow.com/questions/5630649/what-is-the-difference-between-viewwillappear-and-viewdidappear

Taking an iAd across multiple screens

http://stackoverflow.com/questions/7030452/taking-an-iad-across-multiple-screens

from start to finish through my app several times I get a message appear in GDB saying Too many active banners 11 . Creation of new banners will be throttled. The app then crashes. I have tried looking through the Apple documentation and searched..