What is the height of Navigation Bar in iOS 7

Question

I  ve just created a simple iOS 7 app using the default Master Details template   In the MasterViewController m  viewDidAppear method  I logged for  self navigationController navigationBar frame size height self navigationController navigationBar frame origin y   and received 44 and 20 accordingly  This seems weird  because from what I read  the Navigation Bar in iOS 7 should be 64 point height and start at 0 point  so that it sits underneath the Status bar  What I read are  1  iOS 7 UI Transition Guide     Because the status bar is transparent  the view behind it shows   through   2  Using Background Image in Navigation Bar     If your app uses a custom image as the background of the bar  you   ll   need to provide a    taller    image so that it extends up behind the   status bar  The height of navigation bar is changed from 44 points  88   pixels  to 64 points  128 pixels

User · Accepted Answer

I got this answer from the book Programming iOS 7, section Bar Position and Bar Metrics

If a navigation bar or toolbar — or a search bar (discussed earlier in this chapter) — is to occupy the top of the screen, the iOS 7 convention is that its height should be increased to underlap the transparent status bar. To make this possible, iOS 7 introduces the notion of a bar position.

UIBarPositionTopAttached

Specifies that the bar is at the top of the screen, as well as its containing view. Bars with this position draw their background extended upwards, allowing their background content to show through the status bar. Available in iOS 7.0 and later.

User · Answer

There is a difference between the navigation bar and the status bar  The confusing part is that it looks like one solid feature at the top of the screen  but the areas can actually be separated into two distinct views  a status bar and a navigation bar  The status bar spans from y 0 to y 20 points and the navigation bar spans from y 20 to y 64 points  So the navigation bar  which is where the page title and navigation buttons go  has a height of 44 points  but the status bar and navigation bar together have a total height of 64 points   Here is a great resource that addresses this question along with a number of other sizing idiosyncrasies in iOS7  http   ivomynttinen com blog the-ios-7-design-cheat-sheet

[ios7] What is the height of Navigation Bar in iOS 7?

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