Hacking with Swift - Project 8 - Swifty Words

Setup

• Xcode 7.2.1
• Swift 2.0
• iOS 9.2
• iPad

Topics covered

• For loops with a condition: for ... in ... where.
• Programmatically adding an action to a UIButton using addTarget and specifying the event .TouchUpInside.
• Splitting a string into an array using String componentsSeparatedByString.
• Using the enumerate to iterate over an array getting the position in the array as well as the array element (for (index, line) in lines.enumerate()).
• Replacing occurrences of a string in a string using stringByReplacingOccurrencesOfString.
• Trimming strings using stringByTrimmingCharactersInSet (whitespaceAndNewlineCharacterSet).
• Looping over a range without including the upper bound of the range (for i in 0 ..< letterButtons.count). The ...operator includes the upper bound of the range.
• Defining a property observer (didSet) to perform some logic every time the value changes. One can also use the willSet property observer to take action before the value is changed.