Tag: cocoa

objective c – Is It Possible to NSLog C Structs (Like CGRect or CGPoint)?

The Question : 415 people think this question is useful 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: Obviously the ‘%@’ won’t work, hence the question. The Question Comments : NSLog(@”%@”, CGRectCreateDictionaryRepresentation(rect));

ios – What does the NS prefix mean?

The Question : 596 people think this question is useful Many classes in Cocoa/Cocoa Touch have the NS prefix. What does it mean? The Question Comments : I prefer to believe it means “namespace” 😂 The Answer 1 473 people think this answer is useful It’s from the NeXTSTEP heritage. The Answer 2 796 people

ios – Constants in Objective-C

The Question : 1013 people think this question is useful 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 a good idea because it allows easy changing of keys if necessary. Plus, it’s the whole ‘separate your data from your logic’

ios – Xcode – How to fix ‘NSUnknownKeyException’, reason: … this class is not key value coding-compliant for the key X” error?

The Question : 1207 people think this question is useful I’m trying to link a UILabel with an IBOutlet created in my class. My application is crashing with the following error. What does this mean? How can I fix it? *** Terminating app due to uncaught exception ‘NSUnknownKeyException’, reason: ‘[<UIViewController 0x6e36ae0> setValue:forUndefinedKey:]: this class is