ios - "Ambiguous use of subscript" Error after new Swift update -

my project running fine before , still runs fine if using simulator. when connect iphone , try , run project error: "ambiguous use of subscript" when retrieving json info on line:

 let channels = jsonresult["channels"]?[0] as? [string: anyobject] 

any remedy appreciated!

the compiler seems more type restrictive.

the result type of jsonresult["channels"] anyobject have compiler checking value being array.

if let channels = jsonresult["channels"] as? [anyobject], channel = channels[0] as? [string: anyobject] {   // channel } 

or still safer check whether array not empty

if let channels = jsonresult["channels"] as? [[string:anyobject]] !channels.isempty {    let channel = channels[0] // compiler knows it's [string:anyobject]    // channel }