I made a item which i called "SkyCard",can make player fly in survial mode.But I want to turn off the fly mode when the itemstack is moved into a slot.

What void or event can I use to modify the player When this item is moved into the item slot?

Thank you.

For example, there is no event or function such as "SlotItem moving event"....

3 minutes ago, diesieben07 said:

You have to use PlayerTickEvent to constantly check.

What if I want to make a judgment about whether a player has permission to fly by editing the NBT of the EntityPlayer?

For example, how to read the player NBT and how to save the modified NBT(I only know how to modify the item NBT)

Thank you.

8 hours ago, diesieben07 said:

Please clarify what you mean by "NBT of the EntityPlayer". NBT is used for saving to disk only (except for ItemStacks, which are silly).

I don't know.. For example, an EntityLiving would have ‘UUID’ ‘Health’‘Displayname’ tags.I want to give player another tag which called ‘hasSkycard’

Use Capabilities.

On Thursday, January 25, 2018 at 7:43 AM, Draco18s said:

Use Capabilities.

Do you mean to set up players to fly with captives?

No. You use Capabilities to store information on the player.

On 2018/1/27 at 0:32 PM, Draco18s said:

No. You use Capabilities to store information on the player.

Thank you,But I still use the TickEvent in my server.

Sure, do everything wrong. Just disregard our advice and do it your way.

You're probably right afterall. Its not like you came here asking for help.