iOS - How to draw a transparent triangle in view
I am trying to do a custom tab bar with a transparent triangle that points into the tab bar's view. 

Right now I am drawing a linear gradient and a gloss in the drawRect method for the background of this tab bar. I just need to add the transparent triangle on there. I know how to draw a triangle. I just need to know how to make it transparent to show the background beneath the tab bar view. 

Anyone know how to do this?
iOS - How to draw a transparent triangle in view
===

I am trying to do a custom tab bar with a transparent triangle that points into the tab bar's view. 

Right now I am drawing a linear gradient and a gloss in the drawRect method for the background of this tab bar. I just need to add the transparent triangle on there. I know how to draw a triangle. I just need to know how to make it transparent to show the background beneath the tab bar view. 

Anyone know how to do this?