IPhone7 can't sync music from itunes?

Method One:

1, if you open the music in itunes show the "icloud Music database is open" in the following figure, you can follow the steps below.

2, open the iphone "Settings"-"Music"

3, find "icloud music database", it can be closed

4, and then relink itunes, will show the option to sync music

5, close the "icloud music Database", downloaded from Apple Music will be all deleted, if you need these songs, and then open the "icloud music database" can

Method Two:

1, if not the above reasons, you can try to restart the iphone

2, if still unable to resolve, you can first back up the data, open the "Settings"-"General"

3, find the bottom of the "restore"

4, select "Restore all Settings", or for the brush machine;

Click to view: iPhone7 Brush Machine Tutorial