Revert "聊天bug"

This reverts commit 21ef5d8c34dfa0be03911b1f6aee7254eb3d831e.
Revert 21ef5d8..562bcf7

This rolls back to commit 21ef5d8c34dfa0be03911b1f6aee7254eb3d831e.
图片聊天BUG修复