Custom Bindings in MvvmCross

Transcript

1. Custom Bindings
2. Data-Binding to ‘Controls’ MyControl MyValue MyValueChanged CreateBinding .For(view => view.MyValue) .To(vm => vm.Name) As long as MyValueChanged is EventHandler, should just work!
3. Needs Custom 1 Non-standard EventHandler<T> MyControl MyValue MyValueChanged<T>
4. Needs Custom 2 Non-Standard Event Name MyControl Foo BarHappened
5. Custom PropertyBased Binding Create a PropertyInfoTargetBinding: Register it in Setup:
6. Needs Custom 3 No actual property MyControl GetFoo() SetFoo() BarHappened
7. Full Custom Binding Create a full custom TargetBinding: Register it in Setup:
8. WARNING iOS UIKit Memory Management is Hard!
9. WARNING Watch out for event loops
10. Alternatives… You can always directly use: – FindViewById<T> or [Outlet]s With: – ViewModel – ViewModel.PropertyChanged But: – The same warnings apply!
11. Sample Shown in only a couple of apps… https://github.com/slodge/MvvmCross- Tutorials/tree/master/CustomBinding https://github.com/slodge/MvvmCross- Tutorials/tree/master/Sample%20-%20CirriousConference