Xcode 7.3 / Swift 2: "No method declared with Objective-C selector" warning
I've been using selectors for a while, and even after migrating to Swift I was able to use them without issues. That's how I was using on Swift 2 without issues until I updated Xcode to version 7.3:
As use can see I use selectors with NSTimer.
This is the action that is called:
func Start () {
}
As you can see Xcode 7.3 now gives a warning "No method declared with Objective-C selector". By clicking on the warning, Xcode offers a quick fix to the code by adding "Selector", but then I still get the same warning:
Answer
Since Swift 2.2 / Xcode 7.3 there is a new way to use a selector:
Selector("funcName") was changed to #selector(ClassName.funcName)
Have a look at https://github.com/apple/swift-evolution/blob/master/proposals/0022-objc-selectors.md ,
tl;dr;
Replace Selector("Start") with #selector(YOUR_CLASS.Start)
where YOUR_CLASS = class of target in given context.
If you don't want to do it manually, Xcode provides easy fix itself by default, when you have the following situation, tap on the Yellow triangles ( sometimes required to tap/click multiple times ),
it will give you suggestion:
And if you select that suggestion, it will automatically update the selector:
