Please help, I get teh following error in Swift 3:
Ambiguous refernce to memer 'dataTask(wth:completionHandler)'
URLSession.shared.dataTask(with: url) { (data, response, error) in
if error != nil {
print(error)
return
}
}‘Ambiguous reference’ errors like this one have two common causes:
You’re actually referring to something ambiguously
You have some other error in your code that’s thrown the compiler for a loop to the point where it generates this error incorrectly.
In this case I believe you’re suffering from the latter. I’ve seen similar problems when dealing with errors inside closures.
Alas, I can’t point out the exact error because, when I put your code inside a small test project here in my office, it doesn’t generate the same error. There’s clearly something context-specific in play here.
My general approach for tracking down such errors is to comment out the code within the closure to get things compiling. I then selectively uncomment code until I trigger the error.
Alternatively, you can move the code from the closure out of its current context into a more vanilla context, fix the error, and then move it back.
Regardless, once you track down the actual error it would be a good idea to file a bug about the poor diagnostic. Please post your bug number, just for the record.
Finally, just FYI, line 2 of your snippet would be better server by an
if letURLSession.shared.dataTask(with: url) { (data, response, error) in
if let error = error {
…That way, inside the
iferrorThis isn’t the source of you ‘ambiguous reference’ problem, but it’s a good idea to fix it anyway.
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