I am Automating iOS application,i was unable to automate UIAPicker wheel ,i need to select particular value on picker in my project ,i have trying different paths...xpath's,class names...etc.
only way i could was to use .setValue()...to date havent been able to pick a value that was on the list.
If this is your configuration,
{ Appium - > 1.7.1 XCUITestDriver - >2.51.1 }
try .sendkeys(“31”), this would do the needful.