Hiding the inputAccessoryView of a UIWebView

UIWebView+AccessoryHiding.m

#import <objc/runtime.h>
#import <UIKit/UIKit.h>

@interface UIWebView (HackishAccessoryHiding)
@property (nonatomic, assign) BOOL hackishlyHidesInputAccessoryView;
@end

@implementation UIWebView (HackishAccessoryHiding)

static const char * const hackishFixClassName = "UIWebBrowserViewMinusAccessoryView";
static Class hackishFixClass = Nil;

- (UIView *)hackishlyFoundBrowserView {
    UIScrollView *scrollView = self.scrollView;
    
    UIView *browserView = nil;
    for (UIView *subview in scrollView.subviews) {
        if ([NSStringFromClass([subview class]) hasPrefix:@"UIWebBrowserView"]) {
            browserView = subview;
            break;
        }
    }
    return browserView;
}

- (id)methodReturningNil {
    return nil;
}

- (void)ensureHackishSubclassExistsOfBrowserViewClass:(Class)browserViewClass {
    if (!hackishFixClass) {
        newClass = objc_allocateClassPair(browserViewClass, hackishFixClassName, 0);
        IMP nilImp = [self methodForSelector:@selector(methodReturningNil)];
        class_addMethod(newClass, @selector(inputAccessoryView), nilImp, "@@:");
        objc_registerClassPair(newClass);

        hackishFixClass = newClass;
    }
}

- (BOOL) hackishlyHidesInputAccessoryView {
    UIView *browserView = [self hackishlyFoundBrowserView];
    return [browserView class] == hackishFixClass;
}

- (void) setHackishlyHidesInputAccessoryView:(BOOL)value {
    UIView *browserView = [self hackishlyFoundBrowserView];
    if (browserView == nil) {
        return;
    }
    [self ensureHackishSubclassExistsOfBrowserViewClass:[browserView class]];
	
    if (value) {
        object_setClass(browserView, hackishFixClass);
    }
    else {
        Class normalClass = objc_getClass("UIWebBrowserView");
        object_setClass(browserView, normalClass);
    }
    [browserView reloadInputViews];
}

@end

UIWebViewAccessoryHiding.m

#import <objc/runtime.h>
#import <UIKit/UIKit.h>

@interface UIWebView (HackishAccessoryHiding)
@property (nonatomic, assign) BOOL hackishlyHidesInputAccessoryView;
@end

@implementation UIWebView (HackishAccessoryHiding)

static const char * const hackishFixClassName = "UIWebBrowserViewMinusAccessoryView";
static Class hackishFixClass = Nil;

- (UIView *)hackishlyFoundBrowserView {
    UIScrollView *scrollView = self.scrollView;
    
    UIView *browserView = nil;
    for (UIView *subview in scrollView.subviews) {
        if ([NSStringFromClass([subview class]) hasPrefix:@"UIWebBrowserView"]) {
            browserView = subview;
            break;
        }
    }
    return browserView;
}

- (id)methodReturningNil {
    return nil;
}

- (void)ensureHackishSubclassExistsOfBrowserViewClass:(Class)browserViewClass {
    if (!hackishFixClass) {
        Class newClass = objc_allocateClassPair(browserViewClass, hackishFixClassName, 0);
        IMP nilImp = [self methodForSelector:@selector(methodReturningNil)];
        class_addMethod(newClass, @selector(inputAccessoryView), nilImp, "@@:");
        objc_registerClassPair(newClass);

        hackishFixClass = newClass;
    }
}

- (BOOL) hackishlyHidesInputAccessoryView {
    UIView *browserView = [self hackishlyFoundBrowserView];
    return [browserView class] == hackishFixClass;
}

- (void) setHackishlyHidesInputAccessoryView:(BOOL)value {
    UIView *browserView = [self hackishlyFoundBrowserView];
    if (browserView == nil) {
        return;
    }
    [self ensureHackishSubclassExistsOfBrowserViewClass:[browserView class]];
	
    if (value) {
        object_setClass(browserView, hackishFixClass);
    }
    else {
        Class normalClass = objc_getClass("UIWebBrowserView");
        object_setClass(browserView, normalClass);
    }
    [browserView reloadInputViews];
}

@end

I've made a Cocoapod based on your solution.

https://cocoapods.org/pods/FA_InputAccessoryViewWebView

I also posted a gist that allows to customize OR disable the inputAccessoryView:

https://gist.github.com/kgaidis/5f9a8c7063b687cc3946fad6379c1a66

how do i do this for wkwebview

@tinhbka
replace UIWebView's inputView :
-(id)methodReturningKeyboard {
return [[JSInputView alloc] initWithFrame:CGRectZero];
}

- (void)ensureHackishSubclassExistsOfBrowserViewClass:(Class)browserViewClass {
if (!hackishFixClass) {
Class newClass = objc_allocateClassPair(browserViewClass, hackishFixClassName, 0);
newClass = objc_allocateClassPair(browserViewClass, hackishFixClassName, 0);
IMP keyboardImp = [self methodForSelector:@selector(methodReturningKeyboard)];
class_addMethod(newClass, @selector(inputView), keyboardImp, "@@:");
objc_registerClassPair(newClass);
hackishFixClass = newClass;
}
}