Searching over and over again, I found no way of generating those „outlets“ in Xcode 4’s new Interface Builder in conjunction with MonoTouch.
Right before getting nuts, I found this document that has the solution to it:
Transitioning from Xcode 3 to Xcode 4
A guide for MonoTouch users
The chapter named „Adding Outlets and Actions“ contains the solution to it. Basically you have to:
- Select a control (e.g. a button) in the designer
- Hold down the Control key on the keyboard
- Drag the control from the designer into the source corresponding code right below the
Then, after saving the file in Xcode 4, MonoTouch shows the new outlets as properties in the .designer file.
There is also a new documentation regarding the Transition from Xamarin.