Removing WKWebView Accesory bar in Swift - ios

Question

I am trying for a few days now to get this converted into Swift without really having much background with it.
This is what I've got so far ... and I have been looking on google not really knowing what to search for in order to be more specific. Can you please shed some light on what I'm doing wrong ? Thanks
Update:
I have aded the objective-c tag just so more people that are related to this thread may be able to see it and hopefully get an answer.

Answer 1

For those who are still looking, the WebKit team updated WKWebView (iOS 13+) so that you can subclass it to remove/update the input accessory view:
https://trac.webkit.org/changeset/246229/webkit#file1
In Swift, I subclassed it, and returned nil. Worked as expected. I hope it helps.
FYI: I checked the docs, and it doesn't mention not to subclass WKWebView, so subclassing is allowed.
import WebKit
class RichEditorWebView: WKWebView {
var accessoryView: UIView?
override var inputAccessoryView: UIView? {
// remove/replace the default accessory view
return accessoryView
}
}
You can find a working version of it here: https://github.com/cbess/RichEditorView/commits/master

Answer 2

Michael Dautermann answer has got everything right, but in order to hide the accessory bar you need to swizzle the method inputAccessoryView() of UIView Class with the inputAccessoryView() of the _NoInputAccessoryView class. I have just added the couple of extra lines to the code which does this job of method swizzling.
First you'll need a fake class to swap with
final class FauxBarHelper: NSObject {
var inputAccessoryView: AnyObject? { return nil }
}
Then create this method in your controller class
/// Removes the keyboard accessory view from the web view
/// Source: http://stackoverflow.com/a/32620344/308315 / http://stackoverflow.com/a/33939584/308315
func _removeInputAccessoryView(webView: UIWebView) {
var targetView: UIView? = nil
for view in webView.scrollView.subviews {
if String(describing: type(of: view)).hasPrefix("WKContent") {
targetView = view
}
}
guard let target = targetView else { return }
let noInputAccessoryViewClassName = "\(target.superclass!)_NoInputAccessoryView"
var newClass: AnyClass? = NSClassFromString(noInputAccessoryViewClassName)
if newClass == nil {
let targetClass: AnyClass = object_getClass(target)
newClass = objc_allocateClassPair(targetClass, noInputAccessoryViewClassName.cString(using: String.Encoding.ascii)!, 0)
}
let originalMethod = class_getInstanceMethod(FauxBarHelper.self, #selector(getter: FauxBarHelper.inputAccessoryView))
class_addMethod(newClass!.self, #selector(getter: FauxBarHelper.inputAccessoryView), method_getImplementation(originalMethod), method_getTypeEncoding(originalMethod))
object_setClass(target, newClass)
}
HTH ;)

Answer 3

Here's a slightly safer (no unsafe unwraps) version that works with Swift 4 and (at least) iOS 9 trough 12.
fileprivate final class InputAccessoryHackHelper: NSObject {
#objc var inputAccessoryView: AnyObject? { return nil }
}
extension WKWebView {
func hack_removeInputAccessory() {
guard let target = scrollView.subviews.first(where: {
String(describing: type(of: $0)).hasPrefix("WKContent")
}), let superclass = target.superclass else {
return
}
let noInputAccessoryViewClassName = "\(superclass)_NoInputAccessoryView"
var newClass: AnyClass? = NSClassFromString(noInputAccessoryViewClassName)
if newClass == nil, let targetClass = object_getClass(target), let classNameCString = noInputAccessoryViewClassName.cString(using: .ascii) {
newClass = objc_allocateClassPair(targetClass, classNameCString, 0)
if let newClass = newClass {
objc_registerClassPair(newClass)
}
}
guard let noInputAccessoryClass = newClass, let originalMethod = class_getInstanceMethod(InputAccessoryHackHelper.self, #selector(getter: InputAccessoryHackHelper.inputAccessoryView)) else {
return
}
class_addMethod(noInputAccessoryClass.self, #selector(getter: InputAccessoryHackHelper.inputAccessoryView), method_getImplementation(originalMethod), method_getTypeEncoding(originalMethod))
object_setClass(target, noInputAccessoryClass)
}
}

Answer 4

This code snippet should get you over your issue:
class _NoInputAccessoryView: NSObject {
func removeInputAccessoryViewFromWKWebView(webView: WKWebView) {
// make sure to make UIView an optional here...
var targetView: UIView? = nil
for view in webView.scrollView.subviews {
if String(view.dynamicType).hasPrefix("WKContent") {
targetView = view
}
}
// only optionals can be nil
if targetView == nil {
return
}
let noInputAccessoryViewClassName = "\(targetView!.superclass)_NoInputAccessoryView"
var newClass : AnyObject? = NSClassFromString(noInputAccessoryViewClassName)
if newClass == nil {
let uiViewClass : AnyClass = object_getClass(targetView!)
newClass = objc_allocateClassPair(uiViewClass, noInputAccessoryViewClassName.cStringUsingEncoding(NSASCIIStringEncoding)!, 0)
}
}
You can also use "String(view.dynamicType)" to get the class name of the object you're looking at, as I noticed via this answer as I was researching the way to solve your problem.
Using hasPrefix like that in both Objective-C and Swift is really hacky and perhaps a better way of hiding the keyboard could be found for production code?