Change the transparency of the status bar and navigation bar

How do you achieve this translucent effect?

Step One:

To add a static method to the UIImage class:

Extension UIImage {        static func Imagewithcolor (Color:uicolor), UIImage {let                rect = CGRect (x:0, y:0, Width : 1, height:1)        Uigraphicsbeginimagecontext (rect.size) let        context = Uigraphicsgetcurrentcontext ()        Cgcontextsetfillcolorwithcolor (context, color. Cgcolor)        cgcontextfillrect (context, rect) let                image = Uigraphicsgetimagefromcurrentimagecontext ()        Uigraphicsendimagecontext ()                return image    }}

The method takes a Uicolor object and then returns a UIImage object of that color.

Step Two:

Create a uicolor of a certain transparency

Let Semiblackcolor = Uicolor (red:0,green:0,blue:0,alpha:0.5)

#000为黑色, this sets the opacity of the black to 0.5.

Step Three:

To set the transparency of the status bar and navigation bar:

Navigationcontroller?. Navigationbar.setbackgroundimage (Uiimage.imagewithcolor (Semiblackcolor), Forbarmetrics:. Default) Navigationcontroller?. Navigationbar.translucent = TRUE//must be set to True

Dynamically changing this transparency can be achieved by uiscrollviewdelegate:

Func Scrollviewdidscroll (scrollview:uiscrollview) {    //listens for Uiscrollview properties Contentoffset.    if Scrollview.contentoffset.y > {        //...    }}

Note: This method is only applicable to iOS7 and above.

Copyright NOTICE: This article for Bo Master original article, without Bo Master permission not reproduced.

Change the transparency of the status bar and navigation bar