2014/10/15 下午 10:13:24

iphone Programming Glossary: retained

Iphone - How to encrypt NSData with public key and decrypt with private key?

http://stackoverflow.com/questions/10072124/iphone-how-to-encrypt-nsdata-with-public-key-and-decrypt-with-private-key

any additional setup after loading the view typically from a nib. void viewDidUnload super viewDidUnload Release any retained subviews of the main view. e.g. self.myOutlet nil void viewWillAppear BOOL animated super viewWillAppear animated privateTag..

What happens if I don't retain IBOutlet?

http://stackoverflow.com/questions/1250518/what-happens-if-i-dont-retain-iboutlet

nonatomic retain IBOutlet UITextField usernameField Will something bad happen I know in the second case the field is retained but does this make a different since the nib owns the field Will the field go away without the retain and under what circumstances.. to the UIViewController's view property which will retain this top level view and your UITextField which will also be retained. If it is simply set it'll have a retain put on it by the nib loading code otherwise the property will have retained it... retained. If it is simply set it'll have a retain put on it by the nib loading code otherwise the property will have retained it. The UITextField will also be a subview of the top level UIView so it will have an additional retain on it being in the..

Break on EXC_BAD_ACCESS in XCode?

http://stackoverflow.com/questions/1622079/break-on-exc-bad-access-in-xcode

signal but I'm now confused about why this works. I thought that when I used the property it automatically retained it for me and thus I should release it from within init so that I don't have a leak. I'm thoroughly confused about how this..

What exactly must I do in viewDidUnload?

http://stackoverflow.com/questions/2261972/what-exactly-must-i-do-in-viewdidunload

my stuff in dealloc and now iPhone OS 3.0 introduced this funny viewDidUnload method where they say Release any retained subviews of the main view. e.g. self.myOutlet nil So viewDidUnload seems to get called when the view of the view controller..

UIImage rounded corners

http://stackoverflow.com/questions/262156/uiimage-rounded-corners

convert the finished resized image to a UIImage UIImage theImage UIImage imageWithCGImage resizedImage image is retained by the property setting above so we can release the original CGImageRelease resizedImage return the image return theImage..

How many times do I release an allocated or retained object?

http://stackoverflow.com/questions/3730804/how-many-times-do-i-release-an-allocated-or-retained-object

many times do I release an allocated or retained object I am making an iPhone game. I want to release all objects that have been allocated or retained. In the dealloc function.. an allocated or retained object I am making an iPhone game. I want to release all objects that have been allocated or retained. In the dealloc function I am releasing all such objects but then I realized that sometimes I end up releasing objects when.. of an object is meaningless. You should call release exactly same number of times that you caused the object to be retained. No less unless you like leaks and certainly no more unless you like crashes . See the Memory Management Guidelines for..

Difference between self.ivar and ivar?

http://stackoverflow.com/questions/4142177/difference-between-self-ivar-and-ivar

by the compiler which will first release the current string then retains the new string and finally sets name to the retained string. Just calling name foo does nothing more than assigning name to foo. This also means that you can only call self.xxx..

Round two corners in UIView

http://stackoverflow.com/questions/4847163/round-two-corners-in-uiview

convert the finished resized image to a UIImage UIImage theImage UIImage imageWithCGImage bitmapContext image is retained by the property setting above so we can release the original CGImageRelease bitmapContext return the image return theImage..

Reading audio samples via AVAssetReader

http://stackoverflow.com/questions/4972677/reading-audio-samples-via-avassetreader

Embedding YouTube videos on iOS

http://stackoverflow.com/questions/5117617/embedding-youtube-videos-on-ios

super didReceiveMemoryWarning Release any cached data images etc that aren't in use. void viewDidUnload Release any retained subviews of the main view. e.g. self.myOutlet nil void dealloc super dealloc @end It compiles correctly and when I open..

performSelector may cause a leak because its selector is unknown

http://stackoverflow.com/questions/7017281/performselector-may-cause-a-leak-because-its-selector-is-unknown

assumption Release new object values when no longer used methods in the init copy family or attributed with ns_returns_retained Do nothing assume returned object value will be valid in local scope until inner most release pool is drained attributed.. you're calling someMethod is returning a non object including void you could end up with a garbage pointer value being retained released and crash. Additional Arguments One consideration is that this is the same warning will occur with performSelector..