ios - Replace extension of a filename in swift -

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given string format filename.fileextension want replace fileextension newextension. how can it?

in java be

foo.substring(0, foo.lastindexof(".")) + ".newextension"

stringbyappendingpathextension no longer works in swift 2.0 (if using string). does still work nsstring. can do: 

var storepath = (nssearchpathfordirectoriesindomains(.documentdirectory , .userdomainmask, true)[0]) nsstring storepath = storepath.stringbyappendingpathextension("model.sqlite")!

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