isfield on an app-designer app

Trying to load data from a file into the components of an app, protecting against the fact that things might change and some components might no longer be there. But isfield isn't doing when I expect:

K>> c = app.(name)

c = 

NumericEditField (10) with properties:

Value: 10
ValueDisplayFormat: '%11.4g'
RoundFractionalValues: off
Limits: [-Inf Inf]
LowerLimitInclusive: on
UpperLimitInclusive: on
ValueChangedFcn: ''
Position: [429 357 53 22]

K>> isfield(app, name)

ans =

logical

0

What am I missing? I thought isfield should give me true.

Answer 1

[Voss]

Use isprop instead of isfield for checking for the existence of object (including app) properties.