I would like to ask if there are examples out there on how to implement radio-button options on an iPhone app.
I find the Picker View quite big for a simple selectio
Try DLRadioButton, works for both Swift and ObjC. You can also use images to indicate selection status or customize your own style.
Check it out at GitHub.

**Update: added the option for putting selection indicator on the right side.
**Update: added square button, IBDesignable, improved performance.
**Update: added multiple selection support.