2014/10/15 下午 10:05:07

iphone Programming Glossary: clearer

Corebluetooth central manager callback didDiscoverPeripheral twice

http://stackoverflow.com/questions/11557500/corebluetooth-central-manager-callback-diddiscoverperipheral-twice

Declaration/definition of variables locations in ObjectiveC?

http://stackoverflow.com/questions/12632285/declaration-definition-of-variables-locations-in-objectivec

myVar @property nonatomic int myVar @end MyClass.m @implementation MyClass @synthesize myVar @end The result is much clearer and shorter code. The accessor methods will be implemented for you and you can still use the bracket syntax as before. But..

NSDateFormatter, am I doing something wrong or is this a bug?

http://stackoverflow.com/questions/143075/nsdateformatter-am-i-doing-something-wrong-or-is-this-a-bug

ask for it 20080927030337 PM Am I doing something wrong or is this a bug with firmware 2.1 Edit 1 Made description clearer Edit 2 workaround It turns out this is a bug to fix it I set the AM and PM characters to dateFormatter setAMSymbol @ dateFormatter..

Does CoreData on iPhone support IN predicates?

http://stackoverflow.com/questions/1436032/does-coredata-on-iphone-support-in-predicates

MFMailComposeViewController image orientation

http://stackoverflow.com/questions/20204495/mfmailcomposeviewcontroller-image-orientation

vs. how the orientation property is used to describe its orientation at the time it was captured things begin to get clearer. I created a few lines of debugging code to 泟ee all of this. Here 䏭 the imagePickerController code again with the debugging..

Why does Core Data initialization fail when I attempt to do it at these points?

http://stackoverflow.com/questions/2022432/why-does-core-data-initialization-fail-when-i-attempt-to-do-it-at-these-points

in the context when it is good and ready preferably in the applicationDidFinishLaunching method. Hope that is a little clearer you should take a look at the iphone programming guide http developer.apple.com iphone library documentation iPhone Conceptual..

Delegates Vs. Notifications in iPhoneOS

http://stackoverflow.com/questions/2232694/delegates-vs-notifications-in-iphoneos

object and is unusual . Some advantages of delegating The connection between delegating object and delegate is made clearer especially if implementing the delegate is mandatory. If more than one type of message has to be passed from delegatee to.. is mandatory. If more than one type of message has to be passed from delegatee to delegate delegating can make this clearer by specifying one delegate method per message. For notifications you can use multiple notification names but all notifications..

How do I apply a perspective transform to a UIView?

http://stackoverflow.com/questions/347721/how-do-i-apply-a-perspective-transform-to-a-uiview

investigated using CALayer and have run through all the pragmatic programmer Core Animation podcasts but I'm still no clearer on how to create this kind of transform on an iPhone. Any help pointers or example code snippets would be really appreciated..

Can the iPhone4 record from both front and rear-facing camera at the same time?

http://stackoverflow.com/questions/3919807/can-the-iphone4-record-from-both-front-and-rear-facing-camera-at-the-same-time

to say front and rear cameras. I want to record from both cameras at once to two separate streams. I hope I'm a little clearer. iphone ios camera facetime share improve this question It's something the API does allow for. I tried three approaches..

Storing UITextField contents before view pops

http://stackoverflow.com/questions/4061788/storing-uitextfield-contents-before-view-pops

or the IB linked action textFieldEditingEnded method are called. Here is some code that I hope will make it clearer In the UIViewController void viewWillAppear BOOL animated super viewWillAppear animated NSLog @ Entering view will appear..

Find the tangent of a point on a cubic bezier curve (on an iPhone)

http://stackoverflow.com/questions/4089443/find-the-tangent-of-a-point-on-a-cubic-bezier-curve-on-an-iphone

b CGFloat c CGFloat d see also below for another way to do this that follows the 'coefficients' idea and is a little clearer CGFloat t2 t t CGFloat t3 t2 t return a a 3 t 3 a a t t 3 b t 6 b b 3 t t c 3 c 3 t t2 d t3 CGFloat bezierTangent CGFloat..

Repeating NSTimer, weak reference, owning reference or iVar?

http://stackoverflow.com/questions/4945028/repeating-nstimer-weak-reference-owning-reference-or-ivar

my previous retaining repeating nstimer for later access as the discussion has moved forward making a new question clearer than yet another EDIT The scenario is an object creates a repeating NSTimer lets say in viewDidLoad once created the NSTimer..

Only one UITableViewCellAccessoryCheckmark allowed at a time

http://stackoverflow.com/questions/5677218/only-one-uitableviewcellaccessorycheckmark-allowed-at-a-time

initWithFrame:frame] vs. [UIButton buttonWithType]

http://stackoverflow.com/questions/6245882/initwithframeframe-vs-uibutton-buttonwithtype

scalar instance variables to 0 so buttonType should be 0 or UIButtonTypeCustom . Pros Cons You could argue that it's clearer to use buttonWithType and set buttonType explicitly and that it's safer in case Apple changes UIButtonTypeCustom to be 1..

Post photo on user's wall using Facebook iOS SDK

http://stackoverflow.com/questions/6702135/post-photo-on-users-wall-using-facebook-ios-sdk

but anything that works at this stage is good. iphone objective c facebook share improve this question It's clearer what you wish to do post a photo to FB and guarantee that a post goes on the user's wall stream. Unfortunately there are..

UIScrollView : paging horizontally, scrolling vertically?

http://stackoverflow.com/questions/728014/uiscrollview-paging-horizontally-scrolling-vertically

a diagonal swipe still causes the view to scroll diagonally instead of restricting motion to a single axis. Edit to be clearer I'd like to allow the user to scroll horizontally OR vertically but not both simultaneously. iphone objective c uiscrollview..

Loading custom UIView from nib, all subviews contained in nib are nil?

http://stackoverflow.com/questions/7588066/loading-custom-uiview-from-nib-all-subviews-contained-in-nib-are-nil

through the code and that view is being initialized properly only its subviews are missing . Does this help give a clearer picture of the situation at all iphone ios uiview interface builder nib share improve this question You may be misunderstanding..

How to manage application when orientation changes?

http://stackoverflow.com/questions/8090063/how-to-manage-application-when-orientation-changes

change orientation for the first screen and go to the next screen the change does not persist. Attached are images for clearer understanding. The main problem is that when device is rotated then first screen rotates but second does not launch in..