ios-teaching

link tutorial https://www.tutorialspoint.com/swift/index.htm https://github.com/duliodenis/cs193p-Winter-2017

auto layout tutorial

link:

• basic autolayout: https://www.raywenderlich.com/160527/auto-layout-tutorial-ios-11-getting-started
• ios coordinate: https://medium.com/@iopriyam93/ios-coordinate-system-trigonometry-5432c05909b1
• frame and bounds: https://code.tutsplus.com/tutorials/ios-fundamentals-frames-bounds-and-cggeometry--cms-21196 https://medium.com/@GanChau/uiview-frame-vs-bounds-195b9688bde3

sample 01: building a login page with auto layout