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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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compilation warning: no rule to process file for architecture i386

How can I resolve this warning? [WARN]warning: no rule to process file '$(PROJECT_DIR)/MyApp/MessageCell.h' of type sourcecode.objj.h for architecture i386
Sheehan Alam
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Case insensitive comparison NSString

Can anyone point me to any resources about case insensitive comparison in Objective C? It doesn't seem to have an equivalent method to str1.equalsIgnoreCase(str2)
Tejaswi Yerukalapudi
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How to compare two NSDates: Which is more recent?

I am trying to achieve a dropBox sync and need to compare the dates of two files. One is on my dropBox account and one is on my iPhone. I came up with the following, but I get unexpected results. I guess I'm doing something fundamentally wrong when…
n.evermind
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Simulator slow-motion animations are now on?

A while ago I was experimenting, trying to see if i could get navigation items to animate and scroll between each other. I don't know if this is related but suddenly without touching the simulator options I'm getting this message Simulator…
Jules
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Swipe to Delete and the "More" button (like in Mail app on iOS 7)

How to create a "more" button when user swipe a cell in table view (like mail app in ios 7) I have been looking for this information both here and in the Cocoa Touch forum, but I cannot seem to find the answer and I am hoping someone smarter than…
Guy Kahlon
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33 answers

Delete/Reset all entries in Core Data?

Do you know of any way to delete all of the entries stored in Core Data? My schema should stay the same; I just want to reset it to blank. Edit I'm looking to do this programmatically so that a user can essentially hit a reset button.
Michael Grinich
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10 answers

UILabel Align Text to center

How do I align text in UILabel?
vivianaranha
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How to load a UIView using a nib file created with Interface Builder

I'm trying to do something a bit elaborate, but something that should be possible. So here is a challenge for all you experts out there (this forum is a pack of a lot of you guys :) ). I'm creating a Questionnaire "component", which I want to load…
Gonso
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11 answers

How can I send mail from an iPhone application

I want to send an email from my iPhone application. I have heard that the iOS SDK doesn't have an email API. I don't want to use the following code because it will exit my application: NSString *url = [NSString stringWithString:…
Khushi
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Save string to the NSUserDefaults?

How to save a string into the NSUserDefaults?
Shishir.bobby
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Obtain Bundle Identifier programmatically

How can I obtain a string of the Bundle Identifier programmatically from within my App?
user973984
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8 answers

iPhone - Get Position of UIView within entire UIWindow

The position of a UIView can obviously be determined by view.center or view.frame etc. but this only returns the position of the UIView in relation to it's immediate superview. I need to determine the position of the UIView in the entire 320x480…
adam
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Change font size of UISegmentedControl

Can anyone please tell me how can I change the font type and size of UISegmentedControl?
Aashutosh Tiwari
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Making the iPhone vibrate

How can the iPhone be set to vibrate once? For example, when a player loses a life or the game is over, the iPhone should vibrate.
some_id
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Move textfield when keyboard appears swift

I'm using Swift for programing with iOS and I'm using this code to move the UITextField, but it does not work. I call the function keyboardWillShow correctly, but the textfield doesn't move. I'm using autolayout. override func viewDidLoad() { …
Pedro Manfredi
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