How to compare two NSDates: Which is more recent??

I am trying to achieve a dropBox sync and need to compare the dates of two files. One is on my dropBox account and o...

Animate a UIView on a sine wave path?

How would you make a UIView move along a sine wave path? Ideally, I'd be able to stop the animation when the UIVie...

How do I create a UIView subclass with a transparent gradient background??

I want to create a custom UIView that has a transparent gradient background in order to make text more visible over ...

How to compare two NSDates: Which is more recent??

I am trying to achieve a dropBox sync and need to compare the dates of two files. One is on my dropBox account and o...

iOS: Download image from url and save in device?

I am trying to download the image from the url http://a3.twimg.com/profile_images/414797877/05052008321_bigger.jpg ...