How to increase the height of navigation bar in Xcode?

select your ViewController –> select your Navigation Item –> Prompt –> Add space it increase the height of **Navigation bar**

Check Image here :

Programatically

Add this in viewWillAppear or viewDidAppear method

Objective-C

[self.navigationController.navigationBar setFrame:CGRectMake(0, 0, self.view.frame.size.width,80.0)];

Swift

self.navigationController.navigationBar.frame = CGRectMake(0, 0, self.view.frame.size.width, 80.0)

Swift-3

self.navigationController!.navigationBar.frame = CGRect(x: 0, y: 0, width: self.view.frame.size.width, height: 80.0)

iOS 11

objective C

for (UIView *subview in self.navigationController.navigationBar.subviews) {
    if ([NSStringFromClass([subview class]) containsString:@"BarBackground"]) {
        CGRect subViewFrame = subview.frame;
        // subViewFrame.origin.y = -20;
        subViewFrame.size.height = 100;
        [subview setFrame: subViewFrame];
    }
}

swift

for subview in (self.navigationController?.navigationBar.subviews)! {
       if NSStringFromClass(subview.classForCoder).contains("BarBackground") {
            var subViewFrame: CGRect = subview.frame
            // subViewFrame.origin.y = -20;
            subViewFrame.size.height = 100
            subview.frame = subViewFrame

        }

    }