IPhone simple calendar type module in Swift

I need a module in Swift for integrating to existing iOS app, what needs to be made is similar to the daily view of the native calendar widget (see attached). Instead of an event being created with information, the widget will just be used for visually selecting time slots of availability. Each availability will be of minimum 2 hrs. See attached picture sequence for basic interaction example: When 8am is selected the 2 hr slot is shown. Then 11 is selected and 2 hr slot is inserted, by touching the 13 and 14 slots it is expanded. Similar procedure for deselecting and correcting the selection. Details for this can be explained further in discussion. There will be some conditions for how many time slots will need to be selected, for example 3 slots of 2 hrs minimum, or just one slot. Always 2 hr minimum, they can be put on different days and finally a NEXT or SUBMIT button will output the selection. It should be possible to go back to the widget with the selections recorded in order to edit/view. There are some calendar code examples here which may or may not be useful: [login to view URL]