Styles for specific iOS platform are not working

I’m working in an app that was designed for android first, and now we have to style specific small things in iOS platforms.

I tried things like:
.ios .class-name { … }
.platform-ios .class-name { … }
.ios { .class-name { … }}
:root.ios .class-name { … }
.ios :host .class-name { … }

But I had no success.

Have anyone a solution for this task?

For ionic v3, use “.platform-ios” should be fine.
If not, may be problem of css priority, add “!important”.

.platform-ios .your-class-name{
  color: #F00;