2014/10/15 下午 10:10:33

iphone Programming Glossary: introduce

Does a NSURLConnection retain its delegate?

http://stackoverflow.com/questions/1101867/does-a-nsurlconnection-retain-its-delegate

it performs a callback to the returnDataTo object in this case the calling object. This works just fine. Even if I introduce a 30 second delay in my web servers response the JsonDownloader still exists and does it's callback correctly. So my questions..

What's the difference between NSNumber and NSInteger?

http://stackoverflow.com/questions/1285098/whats-the-difference-between-nsnumber-and-nsinteger

world where Core Graphics lives suddenly floats are all around you hovering in the air haha . So it makes sense to introduce a CGFloat there. This paragraph is all educated speculation. Also just to be clear about why you might use NSInteger etc..

Using a UITableViewController with a small-sized table?

http://stackoverflow.com/questions/222956/using-a-uitableviewcontroller-with-a-small-sized-table

view as a direct subview of the enclosing view I mentioned the frame size given is respected . The very moment I re introduce the UINavigationController into the mix no matter if it is added as a subview before or after the table view and no matter..

How to sync CoreData and a REST web service asynchronously and the same time properly propagate any REST errors into the UI

http://stackoverflow.com/questions/3077444/how-to-sync-coredata-and-a-rest-web-service-asynchronously-and-the-same-time-pro

the calling thread until the save operation finishes. FAIL. RestfulCoreData keeps your save calls intact and doesn't introduce any additional waiting time for the client thread. It merely watches out for the NSManagedObjectContextDidSaveNotification..

NSDecimalNumber to unsignedLongLong - wrong value

http://stackoverflow.com/questions/3298589/nsdecimalnumber-to-unsignedlonglong-wrong-value

NSNumber superclass methods on an NSDecimalNumber the internal number is first converted to a double which can introduce binary floating point artifacts like this. As neoneye suggests a way around this might be to use an NSString as an intermediary...

Getting displacement from accelerometer data with Core Motion

http://stackoverflow.com/questions/4449565/getting-displacement-from-accelerometer-data-with-core-motion

part of the solution which I failed to handle eventually within the given time scope One promising approach is to introduce something I call synthectic forces or virtual forces . This is some strategy to react on several bad situations triggering..

NSMutableString as retain/copy

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

hmm... that's not very clear and not very considerate for clients. it also implies a lot of unnecessary things and introduces additional copy overhead. let's re evaluate this. additional considerations problems at this point the default setter requires.. unless you add equivalent external code to support that. depending on how the interface is used this can also introduce a lot of unnecessary copying. boo. ok now we're pretty convinced our 'improvement' is still a bad idea in most cases how..

Looking for experiences on the Apple MFi program registration process [closed]

http://stackoverflow.com/questions/5734071/looking-for-experiences-on-the-apple-mfi-program-registration-process

accessory and I'm trying to gather reliable information. Everything looks pretty confusing though. The proper way to introduce an iphone peripheral into the market seems to be through the Mfi Made for iphone program. These are the facts We have limited..

Truly modal UIAlertView in iPhone?

http://stackoverflow.com/questions/573773/truly-modal-uialertview-in-iphone

by blocking the main thread is that the main thread is what handles events. The classic way of handling events can introduce strange event handling bugs because you don't have one event loop instead you have multiple event loops embedded inside..

How can an iOS app keep a TCP connection alive indefinitely while in the background?

http://stackoverflow.com/questions/5840365/how-can-an-ios-app-keep-a-tcp-connection-alive-indefinitely-while-in-the-backgro

submission. Unfortunately though there is no legal API to keep a connection alive in the background. Perhaps they'll introduce one in a future update to iOS but you might consider submitting a feature request to voice your support for it. share improve..

filtering single and double taps

http://stackoverflow.com/questions/6587453/filtering-single-and-double-taps

double taps i need another method do take place. The problem is that the double tap triggers the single tap and it introduce bugs in my logic. I can't use UIGestureRecognizer because i need to keep track of the points. I try some booleans but no..

How to protect app IPA from hacks if reverse engineering is possible

http://stackoverflow.com/questions/6939222/how-to-protect-app-ipa-from-hacks-if-reverse-engineering-is-possible

with this iphone ios ipad ios4 share improve this question There's always a risk involved. Even if you don't introduce vulnerabilities yourself the platform may allow for exploits which in the end may offer an entry point for a malicious attacker...

Animating custom-drawn UITableViewCell when entering edit mode

http://stackoverflow.com/questions/742829/animating-custom-drawn-uitableviewcell-when-entering-edit-mode

goal 2 above for a smooth user experience. This is the step where I became stuck. The Question What is the best way to introduce this animation to complete goal 3 It would be nice if this could be done in a manner that keeps the logic from my last commit..

Alternative to global variables in app delegate

http://stackoverflow.com/questions/7635008/alternative-to-global-variables-in-app-delegate

as a global that is best. although it is not a good thing... let's assume you really really really really really must introduce global state don't use a singleton. chances are good that you will rewrite it when you want to reuse it. it sugar coats.. should be eliminated. execution state is not global state but localized execution context. execution state can be reintroduced at the right level altered and updated tested and reused predictably. a good design will introduce execution state when.. state can be reintroduced at the right level altered and updated tested and reused predictably. a good design will introduce execution state when needed and at the right level while avoiding global state. Update Your sample is pretty close to what..

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

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

you may want to first try ARC. A lot of people struggle with or try to ignore common practices of MRC example I've introduced a number of objc devs to the static analyzer . If you want to avoid those issues ARC will allow you to postpone your understanding.. CLANG_ENABLE_OBJC_ARC. ARC is binary compatible and all that really happens is that the compiler does its best to introduce the appropriate reference counting operations automatically for you based on the declarations visible to the current translation.. may differ based on your optimizations settings as one example a program which works perfectly in a debug build may introduce a leak or zombie in release. Do you recommend ARC or manual reference counting MRC for a new project Personally I'll be..

Is the use of storyboards in Xcode 4.2 production ready and recommended? (c.f. previous XIB methods)

http://stackoverflow.com/questions/7899650/is-the-use-of-storyboards-in-xcode-4-2-production-ready-and-recommended-c-f-p

Interface Builder. I'd also recommend sticking with whatever you're already using in your existing projects. You can introduce storyboards into your existing projects in steps but remember that they'll only work in iOS 5. There's a WWDC 2011 presentation..

canonical way to randomize an NSArray in Objective C

http://stackoverflow.com/questions/791232/canonical-way-to-randomize-an-nsarray-in-objective-c

modulo m then throws away the random number if it's between n and m. More naive techniques like taking random modulo n introduce a bias towards smaller numbers in the range. static NSUInteger random_below NSUInteger n NSUInteger m 1 Compute smallest..

How to disable horizontal dragging? (webkit-overflow-scrolling: touch;)

http://stackoverflow.com/questions/8907808/how-to-disable-horizontal-dragging-webkit-overflow-scrolling-touch