iOS去除Webview键盘顶部工具栏的方法

- (void) hideKeyboardShortcutBar: (UIView *)view
{
 for (UIView *sub in view.subviews) {
  [self hideKeyboardShortcutBar:sub];
  if ([NSStringFromClass([sub class]) isEqualToString:@"UIWebBrowserView"]) {
   
   Method method = class_getInstanceMethod(sub.class, @selector(inputAccessoryView));
   IMP newImp = imp_implementationWithBlock(^(id _s) {
    if ([sub respondsToSelector:@selector(inputAssistantItem)]) {
     UITextInputAssistantItem *inputAssistantItem = [sub inputAssistantItem];
     inputAssistantItem.leadingBarButtonGroups = @[];
     inputAssistantItem.trailingBarButtonGroups = @[];
    }
    return nil;
   });
   method_setImplementation(method, newImp);
   
  }
 }
}

// 步骤一：创建一个 _NoInputAccessoryView
@interface _NoInputAccessoryView : NSObject
@end
@implementation _NoInputAccessoryView
- (id)inputAccessoryView {
 return nil;
}
@end

// 步骤二：去掉 WkWebviewe Done 工具栏
- (void) hideWKWebviewKeyboardShortcutBar:(WKWebView *)webView {
 UIView *targetView;
 
 for (UIView *view in webView.scrollView.subviews) {
  if([[view.class description] hasPrefix:@"WKContent"]) {
   targetView = view;
  }
 }
 if (!targetView) {
  return;
 }
 NSString *noInputAccessoryViewClassName = [NSString stringWithFormat:@"%@_NoInputAccessoryView", targetView.class.superclass];
 Class newClass = NSClassFromString(noInputAccessoryViewClassName);
 
 if(newClass == nil) {
  newClass = objc_allocateClassPair(targetView.class, [noInputAccessoryViewClassName cStringUsingEncoding:NSASCIIStringEncoding], 0);
  if(!newClass) {
   return;
  }
  
  Method method = class_getInstanceMethod([_NoInputAccessoryView class], @selector(inputAccessoryView));
  
  class_addMethod(newClass, @selector(inputAccessoryView), method_getImplementation(method), method_getTypeEncoding(method));
  
  objc_registerClassPair(newClass);
 }
 
 object_setClass(targetView, newClass);
}