Hello, updated Swift 3, now there is an error on Selector (), how to fix it? enter image description here

Closed due to the fact that off-topic participants Kromster , 0xdb , Grundy , Edward , Eugene Krivenja Sep 14 '18 at 8:20 .

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    2 answers 2

    cool why do you have this line at all, it does nothing - there is no selector there.

    resetButton.addTarget(self, action: #selector(someMethod), for: .touchUpInside)
    • Oh, I was upset and I see nothing, I started to convert, but he showed me 3540 errors) - Leci

    The compiler explicitly tells you that it cannot call the constructor of a Selector structure without parameters. The constructor can take a string parameter explicitly:

     resetButton.addTarget(self, action: Selector("resetAction"), for: .touchUpInside)

    , but in this case, the compiler will ask to use a special expression of the language to create selectors:

     resetButton.addTarget(self, action: #selector(resetAction), for: .touchUpInside)

    Using this expression is safer than the line (the compiler will generate a compilation error if you seal it), and it is also more convenient to change it when refactoring.