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• CoreText: Space between lines

  - by ZeLegolas

  Hi, How I can know what is the size between two lines? I'm using CoreText API.

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• Strange behavior: save video recorded within app?

  - by Josue Espinosa

  I allow the user to record a video within my app, then later play it again. When a user records a video, I save the URL of the video, then play the video later from the saved URL. I save the video both in the Photos app and in my app. If I delete the video within the photos app, it still plays. After about 7 days, the video gets deleted. I think I…

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• Calling NSFetchedResultsController & CoreData experts

  - by JK

  I am having a few nagging issues with NSFetchedResultsController and CoreData, any of which I would be very grateful to get help on. Issue 1 - Updates: I update my store on a background thread which results in certain rows being delete, inserted or updated. The changes are merged into the context on the main thread using the…

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• Blur CALayer's Superlayer

  - by eaigner

  Hi. I've got a CALayer and a sublayer in it. What i want to achieve is a blur of the superlayer (the area under the sublayer), just like the standard sheets do it. I've tried to set a .compositingFilter on the sublayer but this doesn't seem to work. Any ideas how to solve this?

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• How do I draw lines and rectangles on the iPhone?

  - by Rajendra Bhole

  I would like to draw a line and rectangle in my iPhone application. How would I go about doing this? Are there any tutorials I should read?

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• CoreData leak when reading a property

  - by Kamchatka

  Hello, I have the following code in a loop iterating over the different document objects: NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init]; [document primitiveValueForKey:@"data"]; [data writeToFile:filename atomically:NO]; [document.managedObjectContext refreshObject:document mergeChanges:NO]; [pool release]; …

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• Can't build iphone project in xcode with CATRansform3DMakeRotation

  - by Peter Pajchl

  Hi, I need to use CATRansform3DMakeRotation function in my project, but when I try to compile I get an build error Undefined symbols: "_CATransform3DMakeRotation", referenced from: if I comment the function out the project builds fine. Any ideas why is this happening?

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• NSData in CoreData is not saving properly

  - by abisson

  I am currently trying to store images I download from the web into an NSManagedObject class so that I don't have to redownload it every single time the application is opened. I currently have these two classes. Plant.h @property (nonatomic, retain) NSString * name; @property (nonatomic, retain) PlantPicture *picture; …

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• What is the proper way to change the UINavigationController transition effect

  - by Felipe Sabino

  I have seen lots of people asking on how to push/pop UINavigationControllers using other animations besides the default one, like flip or curl. The problem is that either the question/answer was relative old, which means the have some things like [UIView beginAnimations:] (example here) or they use two very different…

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• How to change the default behavior of overrifing when GCC -fstack-protector-all is set?

  - by Vicente Botet Escriba

  I would like to use the GCC -fstack-protector-all option on release mode. The main issue is that when there is an override a code is built. I would like to plug something that will just dump the stack and let the program continue. Is there a way to do that?

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• Predicate for searching the first letter of each word in a string of words

  - by JK

  I would like to create a predicate to search for a specific letter at the start of each word in a string of words e.g. all words starting with A in @"The man ate apples", would return ate and apples. Is it possible to create such a predicate? Thank you.

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• Quartz 2D animating text?

  - by coure06

  i have to animate text around a circle. The text will also scale up/down. Whats the best approach to accomplish this? (i am using Quartz 2D) My approach is: -- Calculate point using sin and cos methods. -- Move Pen there and draw text with alpha and size. -- Clear the screen -- Calculate next point using sin and cos…

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• iPhone animaion, how to flip a coin (2 UIImageview)?

  - by Horace Ho

  Assume there are 2 UIImageview s, the front and back images of a coin. How to animate the 2 UIImageviews such that the face and the back is flipping (spinning) continuously? Thanks!

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• How to animate line-drawing in iPhone development?

  - by david

  I have been searching around, but there seems no good answer for this simple question. So I am asking again: how to animate line-drawing in iphone dev? Basically what I want is something like this: @implementation MyUIView - (void) triggerLineDrawing: (CGPathRef) path { ... // animate line drawing here } …

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• I would like to flip my app's splash screen - how can I mimic the flipside controller's animation?

  - by Andy

  I've finally gotten a working "alpha" version of my first app installed and (mostly) working on my iPhone 3G. So excited I came into the house and danced a little jig while my wife rolled her eyes at me. Don't care - totally stoked that I figured it out on my own (with lots of help here - thanks again, guys). I've…

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• Manually animate a view fading in?

  - by Moshe

  I want a view to fade in when being added to the stack via [self.view addSubview:phrasesEditor.view]; How do I animate this call so that the view fades in (and out)?

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• animating adding/removing layers on iPhone

  - by magesteve

  On the iPhone, when you add a sub layer to a visible view's layer, using either -addSublayer: or -removeFromSuperlayer, shouldn't that sub layer appear or disappear in an animated manner (ie. fade in or fade out gradually)? My program animates using layers (not views). When I change a property of a layer like…

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• Returning a users lat lng as a string iPhone

  - by Joshmattvander

  Is there a way to return the users location as a string from a model? I have a model thats job is to download same JSON data from a web service. When sending in my request I need to add ?lat=LAT_HERE&lng=LNG_HERE to the end of the string. I have seen tons of examples using the map or constantly…

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• Repeating animations using the Stop Selector

  - by Tiago

  I'm trying to repeat an animation until a certain condition is met. Something like this: - (void) animateUpdate { if (inUpdate) { [UIView beginAnimations:nil context:NULL]; [UIView setAnimationDuration:2.0]; [UIView setAnimationDelegate: self]; [UIView…

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• What exactly is the Nullify delete rule doing?

  - by dontWatchMyProfile

  Does that mean that if I delete an managed object which has references (relationship) to some others, the relationships are removed to those others? Example: objectA references objectB and objectC. objectA gets deleted, it's relationship to objectB and objectC is set to the Nullify rule.…

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• In which situations does a managed object context have changes?

  - by dontWatchMyProfile

  In which situations does a managed object context have changes? What can happen that -hasChanges returns YES?

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• TableView doesnt show any Data(CoreData) - App crashe

  - by brush51

  Hey @all, i cant read my data from my database. I have an app with a tabbarcontroller. in the first tab the iphone camera takes a picture from a barcode and send the result to another view (CameraReturnDetailViewController). In CameraReturnDetailViewController is the savebutton, and here…

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• iPhone Development - CoreData runtime error

  - by Mustafa

  I'm facing a strange CoreData issue. Here's the log: 2010-04-07 15:59:36.913 MyProject[263:207] <MyEntity: 0x180370> (entity: MyEntity; id: 0x17e890 <x-coredata://0F55C533-41BD-4F09-9CCA-0CB304CAB065/MyEntity/p380> ; data: <fault>) 2010-04-07 15:59:36.918…

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• CoreData, transient atribute and EXC_BAD_ACCESS.

  - by Lukasz

  I'm trying to build simple file browser and i'm stuck. I defined classes, build window, add controllers, views.. Everything works but only ONE time. Selecting again Folder in NSTableView or trying to get data from Folder.files causing silent EXC_BAD_ACCESS (code=13,…

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• UIView to Form Sheet flip animation rotation issue

  - by GSD

  I have this view to form sheet flip animation that works great in portrait mode but not in any other orientations. In my code, I use it with a UIView embedded in another UIView, which is in the root view. The animation will be rotated. Anyone has an idea why? -…

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