Tricks in Swift

This book contains the tips that we seek most often on the forums: How to recover a photo in the gallery of the device from my code? How to post easily on social networks without importing SDK? How to save a View as UIImage? How to set up a ScrollView easily and quickly (and managing the Zoom)? How to modify the code of a class when I can not access its source code? How to manage the style to: Round the images, create a gradient, a shadow, an animation?