add custom buttons/views to ATLConversationViewController

ATLConversationViewController.m

- (void)addActionButtons {
    CGRect toolbarFrame = self.messageInputToolbar.frame;

    int seperatorWidth = 16;
    UIToolbar *toolbar = [[UIToolbar alloc] initWithFrame:CGRectMake(0, -(toolbarFrame.size.height+5), self.view.frame.size.width, 50)];
    
    
    UIButton *declineButton = [UIButton buttonWithType:UIButtonTypeCustom];
    toolbar.backgroundColor = [UIColor colorWithRed:255.0 green:255.0 blue:255.0 alpha:1];
    
    [declineButton addTarget:self action:@selector(declineWasTapped:)forControlEvents:UIControlEventTouchUpInside];
    
    declineButton.frame = CGRectMake(0, -20, toolbarFrame.size.width/2, 50);
    [declineButton setTitle:@"Decline" forState:UIControlStateNormal];
    [declineButton setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
    [[declineButton layer] setBorderWidth:.5];
    [[declineButton layer] setBorderColor:[UIColor colorWithRed:0.706 green:0.706 blue:0.745 alpha:1.000].CGColor];
    declineButton.titleLabel.font = [UIFont fontWithName:@"ProximaNova-Regular" size:18];
    [declineButton setTitleColor:[UIColor colorWithRed:0.706 green:0.706 blue:0.745 alpha:1.000] forState:UIControlStateNormal];

    UIBarButtonItem *declineItem = [[UIBarButtonItem alloc] initWithCustomView:declineButton];
    
    UIButton *acceptButton = [UIButton buttonWithType:UIButtonTypeCustom];
    [acceptButton addTarget:self action:@selector(acceptWasTapped:)forControlEvents:UIControlEventTouchUpInside];
    
    acceptButton.frame = CGRectMake(toolbarFrame.size.width/2, 0, toolbarFrame.size.width/2, 50);
    [acceptButton setTitle:@"Accept" forState:UIControlStateNormal];
    [acceptButton setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
    [[acceptButton layer] setBorderWidth:.5];
    [[acceptButton layer] setBorderColor:[UIColor colorWithRed:0.706 green:0.706 blue:0.745 alpha:1.000].CGColor];
    acceptButton.titleLabel.font = [UIFont fontWithName:@"ProximaNova-Semibold" size:18];
    [acceptButton setTitleColor:[UIColor colorWithRed:0.405 green:0.821 blue:0.784 alpha:1.000] forState:UIControlStateNormal];
    
    UIBarButtonItem *acceptItem = [[UIBarButtonItem alloc] initWithCustomView:acceptButton];
    UIBarButtonItem *negativeSeparator = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpace target:nil action:nil];
    negativeSeparator.width = -seperatorWidth;
    
    UIBarButtonItem *negativeSeparatorTwo = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpace target:nil action:nil];
    negativeSeparatorTwo.width = -(seperatorWidth - 5);
    
    UIBarButtonItem *positiveSeparator = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpace target:nil action:nil];
    positiveSeparator.width = seperatorWidth;
    
    [toolbar setItems:[NSArray arrayWithObjects:negativeSeparator, declineItem, negativeSeparatorTwo, acceptItem, nil]];
    [self.messageInputToolbar.superview addSubview:toolbar];
//    [self.messageInputToolbar.superview bringSubviewToFront:toolbar];
    self.actionButtons = toolbar;

//    self.messageInputToolbar.translatesAutoresizingMaskIntoConstraints = NO;
//    
//    [self.messageInputToolbar.superview addConstraint:[NSLayoutConstraint constraintWithItem:toolbar attribute:NSLayoutAttributeBottom relatedBy:NSLayoutRelationEqual toItem:self.messageInputToolbar attribute:NSLayoutAttributeTop multiplier:1.0f constant:0.0f]];
    
    //[self.messageInputToolbar.superview layoutIfNeeded];
}