![Lesson 2: Creating Custom Classes in Objective-C | by Will Harrison | Introduction to iPhone Application Development | Medium Lesson 2: Creating Custom Classes in Objective-C | by Will Harrison | Introduction to iPhone Application Development | Medium](https://miro.medium.com/max/1400/1*g2_sQmh__ZBfyd39TAUg6A.png)
Lesson 2: Creating Custom Classes in Objective-C | by Will Harrison | Introduction to iPhone Application Development | Medium
![Lesson 2: Creating Custom Classes in Objective-C | by Will Harrison | Introduction to iPhone Application Development | Medium Lesson 2: Creating Custom Classes in Objective-C | by Will Harrison | Introduction to iPhone Application Development | Medium](https://miro.medium.com/max/1400/1*_AIjvvUJ68kEcuF9v9SvhQ.png)
Lesson 2: Creating Custom Classes in Objective-C | by Will Harrison | Introduction to iPhone Application Development | Medium
![Leben See Taupo Schlacht objc can only be used with members of classes Aufregung In Menge Sand in die Augen streuen Leben See Taupo Schlacht objc can only be used with members of classes Aufregung In Menge Sand in die Augen streuen](https://miro.medium.com/max/2234/1*ujc5-kfMfsOljMr50WccsQ.png)
Leben See Taupo Schlacht objc can only be used with members of classes Aufregung In Menge Sand in die Augen streuen
![objc' can only be applied to an extension of a class , calling extension method from swift to objective c - Stack Overflow objc' can only be applied to an extension of a class , calling extension method from swift to objective c - Stack Overflow](https://i.stack.imgur.com/z38ti.png)