ios - Swift unwrapping optional giving error with data -

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my ios application fetch data server , render images data using 'kingfisher', problem whenever add or replace new image on server application crashes due code below error : "fatal error: unexpectedly found nil while unwrapping optional value"

let prfix:string = "my_prefix_url /\(org.image)" celimage.kf_setimagewithurl((nsurl(string: prfix))!)

please check sceeenshot more detailerror screenshot don't undestand why getting error, because can see prfix got value.

i think due prefix contain unnecessary characters, can fix urlhostallowedcharacterset

you can fix prefix malformed url (swift 2.x).

let urlstr : nsstring = prfix.stringbyaddingpercentencodingwithallowedcharacters(.urlhostallowedcharacterset())!  celimage.kf_setimagewithurl((nsurl(string: urlstr string))!)

this make sure url contains string.


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