cocoa Archives - Page 4 of 4

@synthesize vs @dynamic, what are the differences?

What are the differences between implementing a @property with @dynamic or @synthesize? 8 s 8 @synthesize will generate getter and setter methods for ...

May 1, 2022
0 Comments

Cocoa: What’s the difference between the frame and the bounds?

UIView and its subclasses all have the properties frame and bounds. What’s the difference? 1Best Answer 11 Short frame = a view’s location ...

April 29, 2022
0 Comments

What does the NS prefix mean?

Many classes in Cocoa/Cocoa Touch have the NS prefix. What does it mean? 9 s 9 It’s from the NeXTSTEP heritage.

April 29, 2022
0 Comments

Cocoa Autolayout: content hugging vs content compression resistance priority

I can’t find a clear answer on Apple documentation regarding Cocoa Autolayout about the difference between content hugging and compression resistance. Can somebody ...

April 27, 2022
0 Comments

@class vs. #import

It is to my understanding that one should use a forward-class declaration in the event ClassA needs to include a ClassB header, and ...

April 26, 2022
0 Comments

How do I create delegates in Objective-C?

I know how delegates work, and I know how I can use them. But how do I create them? 19 s 19 An ...

April 22, 2022
0 Comments

Constants in Objective-C

I’m developing a Cocoa application, and I’m using constant NSStrings as ways to store key names for my preferences. I understand this is ...

April 15, 2022
0 Comments

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 following error. What does ...

April 13, 2022
0 Comments

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 macOS ...

April 13, 2022
0 Comments