Hi guys! I'm using Swift in developing applications for iOS. Currently, I'm interested in learning Objective-C to build applications. However, when I create a project with Obj-C, I found out that, there are some differences between using "Obj-C in iOS Dev" and "Obj-C in MacOS CommandLine". For instance: declaring method; iOS Dev Environment: -(void)getFunc {..} macOS Dev Environment: void getFunc() {...} You can see here, there are -(void) and void only. Anyway, can you recommend some documents to study Objective-C? Thank you for spending time for my post! Have a great day! Best regard from Vietnam!

Hi there, Currently, I'm assigned to do the task that allow user can sign their digital signature on iPhone. I've researched for a week and so far, I'm lost on my way. I want to ask your all experience in working the similar task. My demand is: Allow users upload PDF document Then, allow users sign their digital signature Please give me a logic, step and how it works programmatically to research, in order to do this task. Thank you all <3

Hi there, I'm setting up a new "framework target" in my project (xcode 15.2). I dragged and drop another framework to reused (called: SDImage). But at the step of importing SDImage to my framework, my xcode 15.2 always show that "SDImage/SDImage.h" file not found I was trying to set target membership of SDImage, config header/framework search path already but nothing gonna help. Please give me a solution. Thank you and have a nice day