[Bugfix] remove clocker before  destroy
[Bugfix] remove clocker before  destroy

Remove the clocker element and the ticker, set clocker to null dons't delete the ticker
huixt/hxvux,szgxwj/vux,szgxwj/vux,szgxwj/vux,greedying/vux,airyland/vux,greedying/vux,huixt/hxvux,airyland/vux,huixt/hxvux,greedying/vux,airyland/vux