iOS8 iOS9 KeyboardView

GetKeyboardView.m

#define KEYBOARD_WINDOW_LEVEL 10000000
static UIView *GetKeyboardView() {
    UIWindow *keyboardWindow = nil;
    for (UIWindow *window in [UIApplication sharedApplication].windows) {
        if (window.windowLevel == KEYBOARD_WINDOW_LEVEL) {
            keyboardWindow = window;
            break;
        }
    }

    if (!keyboardWindow) return nil;

    UIView *inputContainer = nil;
    for (UIView *subview in keyboardWindow.subviews) {
        NSString *className = NSStringFromClass(subview.class);
        if ([className isEqualToString:@"UIInputSetContainerView"]) {
            inputContainer = subview;
            break;
        }
    }

    if (!inputContainer) return nil;

    UIView *inputHost = nil;
    for (UIView *subview in inputContainer.subviews) {
        NSString *className = NSStringFromClass(subview.class);
        if ([className isEqualToString:@"UIInputSetHostView"]) {
            inputHost = subview;
            break;
        }
    }

    if (!inputHost) return nil;

    UIView *kbImpl = nil;

    for (UIView *subview in inputHost.subviews) {
        NSString *className = NSStringFromClass(subview.class);
        if ([className isEqualToString:@"_UIKBCompatInputView"]) {
            for (UIView *view in subview.subviews) {
                className = NSStringFromClass(view.class);
                if ([className isEqualToString:@"UIKeyboardAutomatic"]) {
                    for (UIView *uiView in view.subviews) {
                        className = NSStringFromClass(uiView.class);
                        if ([className isEqualToString:@"UIKeyboardImpl"]) {
                            kbImpl = uiView;
                            break;
                        }
                    }
                    break;
                }
            }

            break;
        }
    }

    return kbImpl;
}