* [ios] Data nil protection
* [ios] Data nil protection

Hanks10100/incubator-weex,erha19/incubator-weex,zhangquan/weex,Tancy/weex,Hanks10100/incubator-weex,acton393/incubator-weex,erha19/incubator-weex,cxfeng1/incubator-weex,houfeng0923/weex,MrRaindrop/weex,alibaba/weex,acton393/weex,zhangquan/weex,Neeeo/incubator-weex,MrRaindrop/weex,acton393/incubator-weex,miomin/incubator-weex,KalicyZhou/incubator-weex,alibaba/weex,miomin/incubator-weex,bigconvience/weex,LeeJay0226/weex,lvscar/weex,HomHomLin/weex,boboning/weex,yuguitao/incubator-weex,cxfeng1/incubator-weex,Tancy/weex,acton393/weex,zzyhappyzzy/weex,zhangquan/weex,yuguitao/incubator-weex,leoward/incubator-weex,boboning/weex,Hanks10100/weex,yuguitao/incubator-weex,erha19/incubator-weex,namedlock/weex,leoward/incubator-weex,acton393/incubator-weex,xiayun200825/weex,Tancy/weex,yuguitao/incubator-weex,Hanks10100/incubator-weex,miomin/incubator-weex,miomin/incubator-weex,erha19/incubator-weex,acton393/weex,lvscar/weex,kfeagle/weex,Hanks10100/weex,dianwodaMobile/DWeex,cxfeng1/incubator-weex,dianwodaMobile/DWeex,zhangquan/weex,erha19/incubator-weex,Hanks10100/weex,Neeeo/incubator-weex,alibaba/weex,MrRaindrop/weex,HomHomLin/weex,namedlock/weex,zzyhappyzzy/weex,alibaba/weex,miomin/incubator-weex,kfeagle/weex,Neeeo/incubator-weex,LeeJay0226/weex,cxfeng1/weex,KalicyZhou/incubator-weex,lvscar/weex,Hanks10100/weex,houfeng0923/weex,bigconvience/weex,Hanks10100/incubator-weex,lvscar/weex,acton393/incubator-weex,boboning/weex,xiayun200825/weex,alibaba/weex,cxfeng1/weex,alibaba/weex,zzyhappyzzy/weex,xiayun200825/weex,namedlock/weex,Hanks10100/incubator-weex,kfeagle/weex,bigconvience/weex,yuguitao/incubator-weex,acton393/incubator-weex,KalicyZhou/incubator-weex,weexteam/incubator-weex,boboning/weex,cxfeng1/incubator-weex,cxfeng1/weex,HomHomLin/weex,Tancy/weex,MrRaindrop/weex,boboning/weex,zhangquan/weex,weexteam/incubator-weex,miomin/incubator-weex,misakuo/incubator-weex,MrRaindrop/weex,acton393/weex,dianwodaMobile/DWeex,Neeeo/incubator-weex,namedlock/weex,HomHomLin/weex,alibaba/weex,misakuo/incubator-weex,namedlock/weex,lzyzsd/weex,dianwodaMobile/DWeex,houfeng0923/weex,erha19/incubator-weex,Neeeo/incubator-weex,Neeeo/incubator-weex,weexteam/incubator-weex,houfeng0923/weex,kfeagle/weex,lvscar/weex,xiayun200825/weex,acton393/weex,misakuo/incubator-weex,xiayun200825/weex,dianwodaMobile/DWeex,weexteam/incubator-weex,kfeagle/weex,yuguitao/incubator-weex,erha19/incubator-weex,zzyhappyzzy/weex,Hanks10100/incubator-weex,cxfeng1/incubator-weex,misakuo/incubator-weex,LeeJay0226/weex,miomin/incubator-weex,MrRaindrop/incubator-weex,namedlock/weex,Hanks10100/incubator-weex,MrRaindrop/incubator-weex,leoward/incubator-weex,kfeagle/weex,boboning/weex,HomHomLin/weex,MrRaindrop/incubator-weex,bigconvience/weex,LeeJay0226/weex,lvscar/weex,HomHomLin/weex,lzyzsd/weex,dianwodaMobile/DWeex,leoward/incubator-weex,LeeJay0226/weex,zzyhappyzzy/weex,bigconvience/weex,acton393/weex,lzyzsd/weex,Hanks10100/incubator-weex,weexteam/incubator-weex,misakuo/incubator-weex,zhangquan/weex,leoward/incubator-weex,xiayun200825/weex,Hanks10100/weex,KalicyZhou/incubator-weex,acton393/incubator-weex,cxfeng1/incubator-weex,MrRaindrop/incubator-weex,erha19/incubator-weex,weexteam/incubator-weex,lzyzsd/weex,misakuo/incubator-weex,leoward/incubator-weex,Tancy/weex,cxfeng1/weex,Tancy/weex,MrRaindrop/weex,MrRaindrop/incubator-weex,zzyhappyzzy/weex,lzyzsd/weex,LeeJay0226/weex,miomin/incubator-weex,houfeng0923/weex,bigconvience/weex,MrRaindrop/incubator-weex,KalicyZhou/incubator-weex,KalicyZhou/incubator-weex,houfeng0923/weex,cxfeng1/weex,Hanks10100/weex,acton393/incubator-weex,cxfeng1/weex,acton393/incubator-weex,lzyzsd/weex