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Questions tagged [cocoa-touch]

The Cocoa Touch Frameworks that drive iOS apps share many proven patterns found on the Mac, but were built with a special focus on touch-based interfaces and optimization.

Cocoa Touch is Apple's application-development framework for , consisting of Foundation, UIKit (), and Core Data ().

The Cocoa Touch frameworks that drive apps share many proven patterns found on the , but were built with a special focus on touch-based interfaces and optimization.

For development, see .

For Cocoapods, see .

Many Cocoa Touch questions deal with , , , or .

Debugging techniques

Cocoa programs can be debugged with many techniques and tools, both general and specific to , , , and .

Apple's Technical Note about debugging iOS applications

34585 questions
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How to print out the method name and line number and conditionally disable NSLog?

I'm doing a presentation on debugging in Xcode and would like to get more information on using NSLog efficiently. In particular, I have two questions: is there a way to easily NSLog the current method's name / line number? is there a way to…
rein
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UIView with rounded corners and drop shadow?

I’ve been working on an application for a couple of years and received a simple design request: Round the corners on a UIView and add a drop shadow.To do as given below. I want a custom UIView... : I just wanted a blank white view with rounded…
Aditya Vaidyam
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Text inset for UITextField?

I would like to inset the text of a UITextField. Is this possible?
RunLoop
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How to use background thread in swift?

How to use threading in swift? dispatchOnMainThread:^{ NSLog(@"Block Executed On %s", dispatch_queue_get_label(dispatch_get_current_queue())); }];
Anshul
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Add an element to an array in Swift

Suppose I have an array, for example: var myArray = ["Steve", "Bill", "Linus", "Bret"] And later I want to push/append an element to the end of said array, to get: ["Steve", "Bill", "Linus", "Bret", "Tim"] What method should I use? And what about…
Fela
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Is It Possible to NSLog C Structs (Like CGRect or CGPoint)?

I want to be able to debug C structures without having to explicitly type every property that they consist of. i.e. I want to be able to do something like this: CGPoint cgPoint = CGPointMake(0,0); NSLog(@"%@",cgPoint); Obviously the '%@' won't…
mazniak
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Set UIButton title UILabel font size programmatically

I need to set the font size of the title UILabel of a UIButton programmatically.
syam s
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21 answers

Can you animate a height change on a UITableViewCell when selected?

I'm using a UITableView in my iPhone app, and I have a list of people that belong to a group. I would like it so that when the user clicks on a particular person (thus selecting the cell), the cell grows in height to display several UI controls for…
Ted
397
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31 answers

Converting String to Int with Swift

The application basically calculates acceleration by inputting Initial and final velocity and time and then use a formula to calculate acceleration. However, since the values in the text boxes are string, I am unable to convert them to…
Marwan Qasem
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How do I convert NSMutableArray to NSArray?

How do I convert NSMutableArray to NSArray in objective-c?
marcy
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How do you add multi-line text to a UIButton?

I have the following code... UILabel *buttonLabel = [[UILabel alloc] initWithFrame:targetButton.bounds]; buttonLabel.text = @"Long text string"; [targetButton addSubview:buttonLabel]; [targetButton bringSubviewToFront:buttonLabel]; ...the idea…
Owain Hunt
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UILongPressGestureRecognizer gets called twice when pressing down

I am detecting if the user has pressed down for 2 seconds: UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc] initWithTarget:self …
Sheehan Alam
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Easy way to dismiss keyboard?

I have quite a few controls scattered throughout many table cells in my table, and I was wondering if there's an easier way to dismiss the keyboard without having to loop through all my controls and resigning them all as the first responder. I guess…
Seventoes
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How to write iOS app purely in C

I read here Learn C Before Objective-C? Usually I then replace some Obj-C code with pure C code (after all you can mix them as much as you like, the content of an Obj-C method can be entirely, pure C code) Is this true? Is it possible to build an…
001
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How do I add 1 day to an NSDate?

Basically, as the title says. I'm wondering how I could add 1 day to an NSDate. So if it were: 21st February 2011 It would become: 22nd February 2011 Or if it were: 31st December 2011 It would become: 1st January 2012.
Andrew
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