Add a View on Top of the Keyboard Using Inputaccessoryview

Add a view on top of the keyboard using InputAccessoryView

To get a view to stick above the keyboard, the code itself is pretty simple. The code you posted is not correct, try this (note that you must connect textField to the UITextField in your storyboard):

@IBOutlet weak var textField: UITextField!

override func viewDidLoad() {
    super.viewDidLoad()

    let customView = UIView(frame: CGRect(x: 0, y: 0, width: 10, height: 44))
    customView.backgroundColor = UIColor.red
    textField.inputAccessoryView = customView
}

Creating an Input Accessory View programmatically

Before applying constraints view should be in view hierarchy or error which you got will be raised. To get rid of error just do containerView.addSubview(textField) after let textField = UITextField().

Regarding example image you posted, initial solution could be something like this

override var inputAccessoryView: UIView? {
    get {
        //Set up the container
        let containerView = UIView()
        containerView.backgroundColor = #colorLiteral(red: 0.9784782529, green: 0.9650371671, blue: 0.9372026324, alpha: 1)
        containerView.frame = CGRect(x: 0, y: 0, width: view.frame.width, height: 60)

        let textField = UITextField()
        containerView.addSubview(textField)
        textField.translatesAutoresizingMaskIntoConstraints = false
        textField.placeholder = "Add a reframe..."
        textField.textAlignment = .left
        textField.backgroundColor = .white
        textField.layer.cornerRadius = 50/2
        textField.layer.masksToBounds = true
        textField.borderStyle = .none
        textField.leadingAnchor.constraint(equalTo: containerView.leadingAnchor, constant: 8).isActive = true
        textField.bottomAnchor.constraint(equalTo: containerView.bottomAnchor, constant: -5).isActive = true
        textField.topAnchor.constraint(equalTo: containerView.topAnchor, constant: 10).isActive = true
        textField.leftView = UIView(frame: CGRect(x: 0, y: 0, width: 15, height: textField.frame.height)) // adding left padding so it's not sticked to border
        textField.leftViewMode = .always

        let arrow = UIImageView(image: #imageLiteral(resourceName: "arrowUp"))
        containerView.addSubview(arrow)
        arrow.translatesAutoresizingMaskIntoConstraints = false
        arrow.trailingAnchor.constraint(equalTo: textField.trailingAnchor, constant: -10).isActive = true
        arrow.centerYAnchor.constraint(equalTo: textField.centerYAnchor).isActive = true

        let button = UIButton()
        containerView.addSubview(button)
        button.translatesAutoresizingMaskIntoConstraints = false
        button.setTitle(", for: .normal)
        button.contentEdgeInsets = UIEdgeInsets(top: 5, left: 5, bottom: 5, right: 5)
        button.leadingAnchor.constraint(equalTo: textField.trailingAnchor, constant: 10).isActive = true
        button.trailingAnchor.constraint(equalTo: containerView.trailingAnchor, constant: -8).isActive = true
        button.centerYAnchor.constraint(equalTo: textField.centerYAnchor).isActive = true

        // Negative values for constraints can be avoided if we change order of views when applying constrains
        // f.e. instead of button.trailingAnchor.constraint(equalTo: containerView.trailingAnchor, constant: -8).isActive = true
        // write containerView.trailingAnchor.constraint(equalTo: button.trailingAnchor, constant: 8).isActive = true

        return containerView
    }
}

How can I add a toolbar above the keyboard?

UIToolbar* numberToolbar = [[UIToolbar alloc]initWithFrame:CGRectMake(0, 0, [[UIScreen mainScreen] bounds].size.width, 50)];
numberToolbar.barStyle = UIBarStyleBlackTranslucent;
numberToolbar.items = [NSArray arrayWithObjects:
                               [[UIBarButtonItem alloc]initWithTitle:@"Cancel" style:UIBarButtonItemStyleBordered target:self action:@selector(cancelNumberPad)],
                               [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil],
                               [[UIBarButtonItem alloc]initWithTitle:@"Done" style:UIBarButtonItemStyleDone target:self action:@selector(doneWithNumberPad)],
                               nil];
[numberToolbar sizeToFit];
phonenumberTextField.inputAccessoryView = numberToolbar;

To Dismiss Keyboard:

[[UIApplication sharedApplication] sendAction:@selector(resignFirstResponder) to:nil from:nil forEvent:nil];

---

Swift 3:

let numberToolbar = UIToolbar(frame: CGRectMake(0, 0, UIScreen.mainScreen().bounds.width, 50))
numberToolbar.barStyle = UIBarStyle.Default
numberToolbar.items = [
            UIBarButtonItem(title: "Cancel", style: UIBarButtonItemStyle.Plain, target: self, action: "cancelNumberPad"),
            UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.FlexibleSpace, target: nil, action: nil),
            UIBarButtonItem(title: "Done", style: UIBarButtonItemStyle.Plain, target: self, action: "doneWithNumberPad")]
    numberToolbar.sizeToFit()
    phonenumberTextField.inputAccessoryView = numberToolbar

Swift 4.2:

let numberToolbar = UIToolbar(frame:CGRect(x: 0, y: 0, width: UIScreen.main.bounds.width, height: 50))
numberToolbar.barStyle = .default
numberToolbar.items = [
UIBarButtonItem(title: "Cancel", style: .plain, target: self, action: #selector(cancelNumberPad)),
UIBarButtonItem(barButtonSystemItem: .flexibleSpace, target: nil, action: nil),
UIBarButtonItem(title: "Done", style: .plain, target: self, action: #selector(doneWithNumberPad))]
numberToolbar.sizeToFit()
phonenumberTextField.inputAccessoryView = numberToolbar

...

@objc func cancelNumberPad() {
    //Cancel with number pad
}
@objc func doneWithNumberPad() {
    //Done with number pad
}

How to remove inputAccessoryView and replace it with another view?

So apparently the override method gets called every time the keyboard is presented or dismissed (and it gets called multiple times as it is being presented or dismissed in order to render out the view based on the current position of the keyboard).
We can replace input accessory using a simple flag and if statement in the override var inputAccessoryView method by returning the appropriate UIView().

-To dimiss or show keyboard so that the view can be changed use willBecomeFirstResponder and resignFirstResponder

Insert subview above inputAccessoryView

Try to add your transparent overlay to keyWindow in the Objective-C it's look like

[[[UIApplication sharedApplication].windows lastObject] addSubview :customView];

InputAccessoryView / View Pinned to Keyboard with SwiftUI

I got something working which is quite near the wanted result. So at first, it's not possible to do this with SwiftUI only. You still have to use UIKit for creating the UITextField with the wanted "inputAccessoryView". The textfield in SwiftUI doesn't have the certain method.

First I created a new struct:

import UIKit
import SwiftUI

struct InputAccessory: UIViewRepresentable  {

    func makeUIView(context: Context) -> UITextField {

        let customView = UIView(frame: CGRect(x: 0, y: 0, width: 10, height: 44))
        customView.backgroundColor = UIColor.red
        let sampleTextField =  UITextField(frame: CGRect(x: 20, y: 100, width: 300, height: 40))
        sampleTextField.inputAccessoryView = customView
        sampleTextField.placeholder = "placeholder"

        return sampleTextField
    }
    func updateUIView(_ uiView: UITextField, context: Context) {
    }
}

With that I could finally create a new textfield in the body of my view:

import SwiftUI

struct Test: View {
    @State private var showInput: Bool = false
    var body: some View {
        HStack{
            Spacer()
            if showInput{
                InputAccessory()
            }else{
                InputAccessory().hidden()
            }
        }
    }
}

Now you can hide and show the textfield with the "showInput" state. The next problem is, that you have to open your keyboard at a certain event and show the textfield. That's again not possible with SwiftUI and you have to go back to UiKit and making it first responder. If you try my code, you should see a red background above the keyboard. Now you only have to move the field up and you got a working version.

Overall, at the current state it's not possible to work with the keyboard or with the certain textfield method.

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