How to change the navigation bar height

Question

I saw a solution to change the height of navigation bar. But nothing worked for me. Now my application has one view controller connected with a navigation controller. I have

Answer 1

UIView *NavView = [[UIView alloc] initWithFrame:CGRectMake(0, 0 , [UIScreen mainScreen].bounds.size.width , 44)];
NavView.backgroundColor = [UIColor clearColor];
NavView.userInteractionEnabled = YES;
[self.navigationController.navigationBar addSubview:NavView];

UIButton *DateBtn = [[UIButton alloc]initWithFrame:CGRectMake(0, 10, 90, 30)];
DateBtn.backgroundColor = [UIColor clearColor];
[DateBtn setTitle:@"Jan 05" forState:UIControlStateNormal];
DateBtn.titleLabel.font = [UIFont fontWithName:BrushScriptStd size:18];
[DateBtn setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
[NavView addSubview:DateBtn];