JSON Code3840 Error

Source: Internet
Author: User

When sending a data in post, return the following error:

Error Domain=nscocoaerrordomain code=3840 "The operation couldn ' t be completed. (Cocoa error 3840.) " (JSON text did not start with an array or object and option to allow fragments not set.) userinfo=xxxxxxxxx {Nsdebugdescription=json text did not ' start with array ' or ' object ' and ' option to ' Allow fragments ' not set. }

This is a server-side problem, the PHP code problem, and the local code is not related.

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