Property Wrapper In Swiftui

Helping while passing data in between views

They are 3 property wrapper in swiftui, which so helpful to developer.

• State
• Binding
• Environment Object

In this blog we will see about State and Binding

State in swiftui

swiftui fully play with Struct , thats great but sad part is like variables in struct are immutable. To overcome it, we have many ways and @State is one of the best way to do.

Basically @State helps to make the immutable variables into mutating variables.

So now i can change the var a value anywhere and it will also change.

Other best part of @State and Struct is, if im using var aanywhere in UI part and changing it. Struct will automatically send a notification to swiftui and that ui part will updated.

Additional information

When we declare a variable with @state , memory of that variable will be saved separately (Example like a global)

Binding in swiftui

Imagine

We have two views called view1and view2 . sending data from view1 to view2 and changing that data value in view2and now we wanted that changed data to affect in view1 UI too as soon as data have been change.

So we need read and writing at same . don't worry this stuff all will be handled my swiftui Binding itself. Just we need to do is bind the state value and send from view1 to view2 thats it.

Example

So in view we have state variable and just displaying in a text

and binding that state variable with view2 and passing to view2

In view2we declared a variable with Binding. So whenever we changing that variable in view2 , view1 variable will also affected and update in UI.

This is small stuffs about Property Wrapper in swiftui. Keep this untill we meet again.

If any mistake or you need to shout me, comments session in always opened

Nanri vanakkam 🙏