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2014/10/15 ¤U¤È 10:12:57

iphone Programming Glossary: program's

Checking memory allocation in Instruments

http://stackoverflow.com/questions/1061235/checking-memory-allocation-in-instruments

number of objects you deallocate and if you're concerned about total object allocation you can use these to gauge your program's performance. You can take a look at this thread on the Apple Support forums it deals more with what Instruments measures..

When would CBCentralManager's state ever be powered on but still give me a “not powered on” warning?

http://stackoverflow.com/questions/17118534/when-would-cbcentralmanagers-state-ever-be-powered-on-but-still-give-me-a-not

uses CoreBluetooth on an iPhone 5 CBConcreteCentralManager 0x2007d590 is not powered on But when I call state on my program's one and only CBCentralManager object it returns 5 which is CBCentralManagerStatePoweredOn. So it's powered on yet I get..

NSMutableString as retain/copy

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

strings are still reference counted. there are exceptions to this notably CF NS String literals exist for the program's duration you can use CF APIs to create strings which are never released or are managed beyond the scope of traditional retain..

Does iOS 5 have garbage collection?

http://stackoverflow.com/questions/6576674/does-ios-5-have-garbage-collection

written the retains and releases yourself it simply inserts them for you. Normal garbage collectors keep track of your program's memory while it is running. Second since it is just like retain and release it can't catch retain cycles if Object A retains..

What are the advantages and disadvantages of using ARC? [closed]

http://stackoverflow.com/questions/7888568/what-are-the-advantages-and-disadvantages-of-using-arc

and disadvantages of using the new automatic reference counting ARC memory management style in an iOS project An ARC program's execution is nearly identical to well written MRC. That is the behavioral differences are often undetectable because both.. loose usage of reference counting e.g. a typical amount of autoreleases switching to ARC could really improve your program's execution times and peak memory usage. Can you choose not to use ARC when developing with the iOS 5.0 SDK Yes using CLANG_ENABLE_OBJC_ARC...