2014/10/15 下午 10:04:30

iphone Programming Glossary: backing

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

pixel share improve this question It is pretty horrible and slow. Basically you create a bitmap context with a backing store you allocate so you can read the memory then you render the views layer in the context and read the appropriate point..

Where should I save data & files I want to keep long term, and how do I prevent iCloud from backing them up

http://stackoverflow.com/questions/12371321/where-should-i-save-data-files-i-want-to-keep-long-term-and-how-do-i-prevent

should I save data files I want to keep long term and how do I prevent iCloud from backing them up I have file of arbitrary type including Core Data repositories that I need to keep around and not have iOS delete.. or folders of files should be located in the 'Application Support' folder as described above. To prevent iCloud from backing up use URL setResourceValue NSNumber numberWithBool YES 嚙潘蕉嚙潘蕉forKey NSURLIsExcludedFromBackupKey error error as described..

When to use CALayer on the Mac/iPhone?

http://stackoverflow.com/questions/1447598/when-to-use-calayer-on-the-mac-iphone

some 3 D effects through CATransform3D. In many cases you can do this even with your standard views by accessing the backing layer if the view is layer backed . Another concern is cross platform Mac iPhone code. My iPhone application uses an all..

iPhone - dealloc - Release vs. nil

http://stackoverflow.com/questions/1458178/iphone-dealloc-release-vs-nil

Do this if you have a custom setter for the property that is supposed to cleanup more than just the instance variable backing the property. Will overwrite the pointer baz referencing the object with nil but not release the object. The result is a..

How can I encrypt CoreData contents on an iPhone

http://stackoverflow.com/questions/1645007/how-can-i-encrypt-coredata-contents-on-an-iphone

it integrates with the views. I have the data as JSON though I can easily put it into a SQLITE3 database or any other backing data format. I'll take whatever is easiest a to encrypt and b to integrate with the iPhone view layer. The user will need..

Pre-load existing data into a Core Data-based iPhone app?

http://stackoverflow.com/questions/1767322/pre-load-existing-data-into-a-core-data-based-iphone-app

did above with SQLite iphone core data share improve this question Assuming you're using CoreData with an SQLite backing then absolutely. The most direct option would be to let the application generate the schema for you then using that empty..

Any way to pre populate core data?

http://stackoverflow.com/questions/2230354/any-way-to-pre-populate-core-data

way to pre populate core data ive been creating a list app and backing it with core data. I would like to have a default list of say 10 airport items so that the user doesnt have to start from..

How view data stored in Core Data?

http://stackoverflow.com/questions/2268102/how-view-data-stored-in-core-data

like to be able to look inside it to see what I have stored in there. Is there an easier way than searching for the backing store mine should be SQLite and reading it from there Doesn't seem very Apple esque. iphone core data share improve this..

Property Declaration and Automatic Backing Storage Allocation

http://stackoverflow.com/questions/3238009/property-declaration-and-automatic-backing-storage-allocation

c share improve this question On the modern Objective C runtime nonfragile abi they are the same the ivar backing will be created automatically by the @synthesize declaration. This is the runtime used by iPhone and 64 bit Mac OS X apps...

Prefixing property names with an underscore in Objective C [duplicate]

http://stackoverflow.com/questions/3521254/prefixing-property-names-with-an-underscore-in-objective-c

to themselves to access properties it's hard to confuse when you're accessing a property or when you're accessing its backing ivar directly though using the 2.0 dot access to properties does make it more possible. Using the standard message passing..

Non-retaining array for delegates

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

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 WeakReferences id mutableArrayUsingWeakReferences..

What does @synthesize window=_window do?

http://stackoverflow.com/questions/5170631/what-does-synthesize-window-window-do

those two identical anyway iphone objective c share improve this question Your properties almost always have a backing variable. What @synthesize searchBar _searchBar does is declare that the backing variable for your search bar will be called.. Your properties almost always have a backing variable. What @synthesize searchBar _searchBar does is declare that the backing variable for your search bar will be called _searchBar . This allows you to decouple the name of the property from the name.. the name of the property from the name of your variable. In fact if you don't use @synthesize you don't need to have a backing variable at all. As for why people do this everyone has different reasons. Personally I do it to avoid clashes with variable..

Why does this create a memory leak (iPhone)?

http://stackoverflow.com/questions/612986/why-does-this-create-a-memory-leak-iphone

should not use self.editMyObject release in a dealloc method. You should call editMyObject release assuming the ivar backing the @property is called editMyObject . Calling the accessor via self.editMyObject is safe for @synthesized accessors but..

Property vs instance variable in Objective-C [duplicate]

http://stackoverflow.com/questions/6146244/property-vs-instance-variable-in-objective-c

Quartz 2D drawRect method (iPhone)

http://stackoverflow.com/questions/716351/quartz-2d-drawrect-method-iphone

views in Leopard. On the iPhone all UIViews are layer backed where in Leopard views need to manually enable layer backing. For a layer backed view content is drawn once using whatever you supplied in drawRect but then is buffered into the layer...

How does the coordinate system in an CGContextRef look like?

http://stackoverflow.com/questions/868052/how-does-the-coordinate-system-in-an-cgcontextref-look-like

The standard coordinate system on the iPhone is inverted with the upper left coordinate for a UIView being 0 0 . Its backing layer also has those flipped coordinates so drawing into a context for the view or its layer starts at 0 0 for the upper..

Core Data VS Sqlite or FMDB…?

http://stackoverflow.com/questions/8723923/core-data-vs-sqlite-or-fmdb

has so many implicit assumptions about the speed of the disk the amount of memory and the reality of a VM with a backing store it just will not work well on a battery powered memory limited device with a funky memory model. It won't work very..