Fix animation needlayout (#2585)
Fix animation needlayout (#2585)

* [iOS] Fix bug that 'width' & 'height' style value cannot be retrieved from component styles dict.

* [iOS] Fix bug that 'width' & 'height' style value cannot be retrieved from component styles dict.

alibaba/weex,alibaba/weex,alibaba/weex,alibaba/weex,alibaba/weex,alibaba/weex,alibaba/weex