问题
I am using SwiftUI and bridge to UITextField (I need to assign firstResponder). I use the code from here: SwiftUI: How to make TextField become first responder?
The following code updates my @Binding var. This of course is intended behavior. The problem is that this causes the textField to ignore the frame/ bounds. It just expands and pushes other elements out of the view. Other parts of the view are also reliant on the @State.
func textFieldDidChangeSelection(_ textField: UITextField) {
text = textField.text ?? ""
}
How can I update the @State and still keep the textField in the frame?
回答1:
You need to decrease priority of content resistance in makeUIView (so content would not push external layout set in SwiftUI) like below
func makeUIView(context: UIViewRepresentableContext<MyField>) -> UITextField {
let field = UITextField(frame: .zero)
field.setContentCompressionResistancePriority(.defaultLow, for: .horizontal)
...
来源：https://stackoverflow.com/questions/59192194/swiftui-state-change-in-uitextfield-causes-the-framewidth-to-grow-uncontrolled