What plug-in does iphone have that allows the notification bar to display the weather?

The method is as follows:

1, enter the phone settings-privacy options.

2. Enter the location service under the privacy page.

3. Slide the slider to the right to turn on the weather. (ios8 also needs to select always access status)

4, mobile phone settings-notification center.

5. Slide the slider to the right to open today's view and display today's summary of the notification center page.