Programare swift Swift tutorial from tutorials point

Swift 4 Local and Global Variables .................................................................................................................. 111 Type Properties ................................................................................................................................... 111 Querying and Setting Properties ......................................................................................................... 112 24. SWIFT 4 – METHODS ....................................................................................................... 113 Instance Methods ............................................................................................................................... 113 Local and External Parameter Names .................................................................................................. 114 External Parameter Name with # and _ Symbol .................................................................................. 115 Self property in Methods .................................................................................................................... 116 Modifying Value Types from Instance Methods .................................................................................. 117 Self Property for Mutating Method ..................................................................................................... 118 Type Methods ..................................................................................................................................... 118 25. SWIFT 4 – SUBSCRIPTS..................................................................................................... 120 Subscript Declaration Syntax and its Usage ......................................................................................... 120 Options in Subscript ............................................................................................................................ 122 26. SWIFT 4 – INHERITANCE .................................................................................................. 124 Base Class ............................................................................................................................................ 124 Subclass .............................................................................................................................................. 125 Overriding ........................................................................................................................................... 126 Methods Overriding ............................................................................................................................ 126 Property Overriding ............................................................................................................................ 127 Overriding Property Observers ............................................................................................................ 128 Final Property to prevent Overriding ................................................................................................... 129 27. SWIFT 4 – INITIALIZATION ............................................................................................... 131 Initializer Role for Stored Properties ................................................................................................... 131 Setting Property Values by Default ..................................................................................................... 132 viii

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