How to silence a warning in swift

There is no general construct to silence deprecation warnings in Swift, but there is a workaround that can be applied in many cases.

Let's say you have a method getLatestImage() on class Foo which uses deprecated methods/classes.

Use @available as Daniel Thorpe described to silence all the warnings inside the method:

@available(iOS, deprecated: 9.0)
func getLatestImage() -> UIImage? {
    ...
}

Now you would like to call the method getLatestImage() without having a deprecation warning. You can achieve that by first defining a protocol and an extension:

private protocol GetLatestImage {
    func getLatestImage() -> UIImage?
}
extension Foo: GetLatestImage {}

And then call the method without a deprecation warning.

If foo is an instance of Foo:

(foo as GetLatestImage).getLatestImage() // no deprecation warning

If you want to call a static property/function of Foo:

(Foo.self as GetLatestImage.Type).someStaticProperty

The result is you have Swift code that uses deprecated API without any deprecation warnings.

As of 2021, Xcode 13.0, the consensus is that there is no way to achieve that.

I'll update/edit this answer if Apple add the feature.

Put it in your wish list for WWDC 2022 !