Tagged Questions

iOS is Apple's operating system for mobile devices, such as the iPhone, iPod touch, iPad and Apple TV (2nd generation and up) devices. It shares a lot with Mac OS X, but is optimized for touch-based interfaces.

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UTF8 encoding in NSString

I used the following code to encode unicode character "\u1000" into UTF8 encoding. NSString *unicodeString = @"\u1000"; NSLog(@"%s", [unicodeString UTF8String]); The expected result would be ...
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Labels not appearing after clicking cell

I'm still new with programming. I'm doing a final project for my iOS Dev class and it is to build a basic app. I've been trying to figure out how to complete this for a few days and it's one problem ...
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custom view when local notification is fired

I am relatively new to Xcode, I am building a very simple alarm clock and below is a small snippet of the app. My question is: how to display a custom view ( i.e. a picture or an animation ) when the ...
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1answer
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Creating a completely custom UIRefreshControl

I need to create an entirely custom UIRefresh control. Animation, image, pull down amount, etc... My initial thought is to start from scratch, use a UIViewController, add my own view to it, animate ...
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Xcode Build error with one spec. Library: ld: library not found for -lzbar

I checked out a working app from SVN. Want to test it in iphone simulator. But the building failed. Ld ...
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Table view, manual and settings in one screen: Best practice?

I am writing a text editing app. I target iOS 6 and 7, and use storyboards and autolayout. I thought this layout for the welcome screen would work well: <Files in a table view> ...
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Free cross-platform collision-detection libraries for iOS development

I'm developing cross-platform (Windows, Mac & iPad) software in C++ using the Ogre3D rendering engine. I need to add collision detection (but not complicated physics) so need a library which will ...
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1answer
10 views

uicollectionview didselectitematindexpath

i have a collection view, the datasource delegate works well, but UICollectionViewDelegate : -(void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath ...
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8 views

Implement photoshop blending mode in iOS

There were numerous situations when designers gave me psd files, and there two layers where set with blending mode multiply. and always I couldn't implement that behaviour, and just used different ...
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25 views

iOS: copying an object from oldArray to newArray

I have oldArray that consists of many small arrays. Now i want to take one of these objects (one small array), modify it, and then (if the user hits a button) replace it. To do that: Step 1 - I ...
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13 views

Auto Layout using initWithFrame?

If I'm implementing AutoLayout programatically in iOS is it proper to use initWithFrame method? If not how to initialise a view of preferred size?
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Xcode 4.6 how to connect Mysql database

I'm sorry, but I am a beginner and do not know what to do. :D Please help me with a couple of questions. I can't connected my apps with mysql server please help. How I connect my iphone apps with ...
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1answer
19 views

deselecting button from another view controller

I have a UIButton, in each of the cells of a UItableview in viewcontrollerA. When you click the button, the button highlights and goes to viewcontrollerB. I want the buttons to deselect when you go ...
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Recognise a phrase from voice input only if the intensity hits certain decibel [iOS]

I've had a good browse around the topics in this group trying to see if this question has been addressed before, but couldn't find exact thing. So, apologies if this is old hat. Please also excuse the ...
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2answers
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How to change height of grouped UITableView header?

I know how to change the height of the section headers in the table view. But I can't find anywhere online that points me in the right direction to change the default spacing before the first ...

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