ios - How can I change the color of the UITabBar top border by creating a UIImage programmatically? -


from understanding, way change color of top border set background image (320x49, pixel line @ top). seems me way (please correct me if i'm wrong).

is there way without using image file? example, helped me change navigationbar bottom border creating uiimage code:

uinavigationbar.appearance().shadowimage = uiimage.colorfornavbar(uicolor.redcolor())  extension uiimage {        class func colorfornavbar(color: uicolor) -> uiimage {         let rect = cgrectmake(0.0, 0.0, 1.0, 1.0)         uigraphicsbeginimagecontext(rect.size)         let context = uigraphicsgetcurrentcontext()          cgcontextsetfillcolorwithcolor(context, color.cgcolor)         cgcontextfillrect(context, rect)          let image = uigraphicsgetimagefromcurrentimagecontext()         uigraphicsendimagecontext()          return image     } }

this solution works well; changes color of bottom border.

i tried apply tabbar, nothing changes @ all.

uitabbar.appearance().shadowimage = uiimage.colorfornavbar(.redcolor())

you've pretty answered own question. can same thing uitabbar did uinavigationbar. if want change shadow image (i.e. "top border"), have change background image. straight apple:

the custom shadow image tab bar. attribute ignored if tab bar not have custom background image. set attribute programmatically, use shadowimage property.

in own question seem aware of this:

the way change color of top border set background image (320x49, pixel line @ top)

except it's not background image has line @ top. have set background image anything, can set shadow image preference.

if open simple "tabbed application" template within xcode, you'll find adding these 2 lines of codes (and uiimage extension code) indeed work:

// white background red border on top uitabbar.appearance().backgroundimage = uiimage.colorfornavbar(.whitecolor()) uitabbar.appearance().shadowimage = uiimage.colorfornavbar(.redcolor())

tab bar


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