Some time ago, I need a broken line gragh in a project. Considering that it is pressed for time, I just found a lib on Github and used it in my product. At that time, I was moved by its dynamic effect. Thus I have to re-consider it again to find out how it works now!

It is common sense that app on iOS will keep running in the background for 10 minutes except for tasks like downloading or playing music, but I accidentally find a trick, letting the app keep running as long as you want.

It is not hard to access users’ steps data once you know what APIs methods should be invoked. Nevertheless, here are the minimum requirements of the devices:

Dragging down the table view, you will find the header becomes larger, following your finger. It is a familiar animation among the apps we use every day.