I'm doing a photo app and sometimes the lighting is off in certain areas and the picture isn't clear. I was wondering if there was a feature that can auto adjust the brightness, contrast, exposure, saturation of a picture like…
I'm developing an app that has a UICollectionView - the collection view's job is to display data from a web service. One feature of the app I am trying to implement is enabling the user to change the layout of…
I have a requirement to make application that has color theme base on user selection User selects an color at begining (in 8 available colors), that color will be applied for the whole app (background color, buttons, icons ....) If…
I am debugging a piece of code where an UIImage may be gone through UIImageJPEGRepresentation multiple times, I thought that must be a bug and the image quality will get worsen, but surprisingly we can't see the difference visually. So…
I'm a fairly new app dev and very new to Sprite Kit. I am creating a game where I want a ball to always fall downward as if it were in gravity. This is just a 2d app so all…
I'm attempting to ping eBay's API using an HTTP request, however Xcode is giving me the following error No known class method for selector stringWithFormat What I want to do here is append whatever string is input in the searchField…
Based on the concepts in my question here and the problems with PNG files outlined in my other question here, I'm going to try loading an RGBA image from two jpeg. One will contain the RGB and the other only…
I'm attempting to parse item data from eBay's API, however I'm having trouble getting the cells in my tableview setup properly. I'm getting multiple errors in the - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath method of my MasterViewController below stating that…
I'm making an iPhone app that primarily focuses on loading webpages in UIWebviews. To show the user that the web page is currently loading, I'd like the screen to display a loading animation while the page loads, similar to the…
Objective-C has no namespaces; it's much like C, everything is within one global namespace. Common practice is to prefix classes with initials, e.g. if you are working at IBM, you could prefix them with "IBM"; if you work for Microsoft,…