Focus change in TextField and SecureField
Reading time: 2 min
Detecting if a text field gained or lost focus is not entirely straightforward in SwiftUI.
TextField constructor has a parameter named onEditingChanged, but it triggers only when the user taps the return key in the virtual keyboard, not when the focus is actually lost.
Even worse, SecureField doesn't have such a parameter, and there's no way to know if the user is interacting with the view!
Scrolling ScrollView programatically
Reading time: 1 min
This recipe is about how to scroll a SwiftUI ScrollView programatically. Here's a quick breakdown of what to do:
- For iOS 13 - tough luck - it can't be done. For whatever reason, this is one of things that were deemed less important for the initial release of SwiftUI.
- For iOS 14 and above - embed your
ScrollView's root view in aScrollViewReader, and then use thescrollTomethod.
Reading time: 1 min
This tutorial shows how to create a custom Swiftui Button style with distinct disabled and pressed states.
Clip content in wrapped UITextField
Reading time: 1 min
When implementing a custom TextField by wrapping a UITextField in UIViewRepresentable (just like we did in our custom SecureField that tracks focus change, you need to be careful as its size normally grows with its content.
Reading time: 1 min
A common issue in SwiftUI is that, when the keyboard appears, it covers up a part of your UI. This is especially problematic if it overlaps the exact TextField you're editing, so that you can't even see what you're typing!
Take this credit card input field at the bottom of a screen:
If you open the keyboard up, it gets covered up completely:
Use the following code to make your views adjust their bottom padding according to keyboard visibility.