This is a very simple post, briefing the different ways of Property Initialisation within a Class in Swift. Just a little of learning into Swift, you should have realised that every variable has to be either initialised with some value or with its type. Similar strategy holds for the Properties inside the class.
Below are gists of various property initialisations.
That's the basic of Class Property Initialisation in Swift. Try it out in Xcode Playground.
Below are gists of various property initialisations.
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| class MyClass1 { | |
| //Variable initialised as Int type. `anInteger` gets initialized to 0 | |
| var anInteger = Int() | |
| } | |
| class MyClass2 { | |
| //Here you are saying `anInteger` is an Optional Type. Hence you don't have to initialize any value. Just Type spcification is enough. `anInteger` will be nil | |
| var anInteger:Int? | |
| } | |
| class MyClass3 { | |
| //In this case you just specify the Type of the variable, and the compiler has NO ISSUES! That's because the init method is defined and the value is getting set in that. | |
| var anInteger: Int | |
| init () { | |
| anInteger = 5 | |
| } | |
| } |
That's the basic of Class Property Initialisation in Swift. Try it out in Xcode Playground.
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