About the secret between the ScrollView and the navigation bar

In the cook of the company project, I found the secret between the ScrollView and the navigation bar.

1.scrollview in the navigation controller inside is the default downward offset of 64px, we can set the controller's properties automaticallyadjustsscrollviewinsets to No, To bring our ScrollView to the top.

2. The navigation bar in the transparent time, is not occupy the space, the opaque time occupies the space, will affect our upper attribute the use, we can by the set Extendedlayoutincludesopaquebars = yes to make us transparent or opaque in the navigation bar can be reached on top of the case

3. Set the color settings for title on the navigation bar  

Self.Navigationcontroller.Navigationbar.titletextattributes = @{Nsforegroundcolorattributename:[UicolorWhitecolor]};

About the secret between the ScrollView and the navigation bar