1, first of all, change a new data cable to test whether it can be charged normally, mainly to confirm that it is not a problem with the line or interface. If it can be charged then the problem is solved, if it still can not be charged, it should be the charger problem.
2, at this time to consider the problem of warranty, if it is still within the warranty period, directly sent to the Apple after-sales store for after-sales repair or replacement (can not be repaired).
3, if the warranty period has been issued and the appearance is not damaged, you can also directly go to the after-sales service and add part of the price difference to replace a new or buy a new original.
4, of course, the price of Apple after-sales and related accessories for its devices is notoriously high, so if you are not paranoid, it is recommended to buy a big brand compatible or certified charger.
5, in order to avoid damage to the Apple charger and extend its service life, in the daily use of the process must be careful not to let the charger bump or fall, not to pull out from the plugboard.