类型'MasterViewController'不符合协议'CropPerformanceControllerDelegate'

On my app there are several views where you input certain values (settings) and so these settings get sent back to the master view using delegates. I already had this setup with 2 other views, and just copied and pasted the required code and changed the variables, however this brought up the error; "Type 'MasterViewController' does not conform to protocol 'CropPerformanceControllerDelegate'"The Code is below:On my app there are several views where you inp