iOS
iOS is the mobile operating system running on the Apple iPhone, iPod touch, and iPad. Use this tag [ios] for questions related to programming on the iOS platform. Use the related tags [objective-c] and [swift] for issues specific to those programming languages.
61
votes
14
answers
1.3K
views
Constants in Objective-C
I'm developing a Cocoa application, and I'm using constant NSStrings as ways to store key names for
63
votes
30
answers
2K
views
How to change the name of an iOS app?
I began an iPhone project the other day with a silly development code name, and now I want to change the name
50
votes
30
answers
2.9K
views
61
votes
30
answers
2K
views
How can I disable the UITableView selection?
When you tap a row in a UITableView, the row is highlighted and selected. Is it possible to disable this so ta
63
votes
23
answers
2.2K
views
How do I check if a string contains another string in Objective-C?
How can I check if a string (NSString) contains another smaller string? I was hoping for something like: NSS
43
votes
30
answers
2.7K
views
Xcode - How to fix 'NSUnknownKeyException', reason: … this class is not key value coding-compliant for the key X" error?
I'm trying to link a UILabel with an IBOutlet created in my class. My application is crashing with the f
53
votes
19
answers
1.9K
views
performSelector may cause a leak because its selector is unknown
I'm getting the following warning by the ARC compiler: "performSelector may cause a leak because its sel
61
votes
27
answers
1.6K
views
How do I sort an NSMutableArray with custom objects in it?
What I want to do seems pretty simple, but I can't find any answers on the web. I have an NSMutableArray
51
votes
30
answers
2.6K
views
How can I check for an active Internet connection on iOS or macOS?
I would like to check to see if I have an Internet connection on iOS using the Cocoa Touch libraries or on mac
60
votes
28
answers
607
views
Transport security has blocked a cleartext HTTP
What setting do I need to put in my info.plist to enable HTTP mode as per the following error message? Tra
62
votes
28
answers
720
views
Using Auto Layout in UITableView for dynamic cell layouts & variable row heights
How do you use Auto Layout within UITableViewCells in a table view to let each cell's content and subview
66
votes
30
answers
616
views
How can I make a UITextField move up when the keyboard is present - on starting to edit?
With the iOS SDK: I have a UIView with UITextFields that bring up a keyboard. I need it to be able to: Allow s
58
votes
27
answers
1.4K
views
What's the difference between the atomic and nonatomic attributes?
What do atomic and nonatomic mean in property declarations? @property(nonatomic, retain) UITextField *userNam
67
votes
30
answers
436
views
Vertically align text to top within a UILabel
I have a UILabel with space for two lines of text. Sometimes, when the text is too short, this text is display
