iOS (Objective-c )Tutorials

Ry’s Objective-C Tutorial

iOS (iPhone, iPad) Tutorial

Swift Examples Repo

iOS 8 Swift Programming Cookbook (by: Vandad Nahavandipoor)

Cocopods Installation Progress.

For installing Cocopods

sudo gem install cocoapods -V

For installing pods

pod install --verbose 

You can run pod install --no-repo-update if you do not want to perform a repo update.

StackOverflow: Cocoapods setup stuck on pod setup command on terminal

Device check and Screen size

#define IS_IPAD (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad)
#define IS_IPHONE (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone)
#define IS_RETINA ([[UIScreen mainScreen] scale] >= 2.0)

#define SCREEN_WIDTH ([[UIScreen mainScreen] bounds].size.width)
#define SCREEN_HEIGHT ([[UIScreen mainScreen] bounds].size.height)
#define SCREEN_MAX_LENGTH (MAX(SCREEN_WIDTH, SCREEN_HEIGHT))
#define SCREEN_MIN_LENGTH (MIN(SCREEN_WIDTH, SCREEN_HEIGHT))

#define IS_IPHONE_4_OR_LESS (IS_IPHONE && SCREEN_MAX_LENGTH < 568.0)
#define IS_IPHONE_5 (IS_IPHONE && SCREEN_MAX_LENGTH == 568.0)
#define IS_IPHONE_6 (IS_IPHONE && SCREEN_MAX_LENGTH == 667.0)
#define IS_IPHONE_6P (IS_IPHONE && SCREEN_MAX_LENGTH == 736.0)