Viewtree observer - #1

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Wenjuann wants to merge 2 commits into

llobile:masterfrom

Wenjuann:view-tree

Commits on Feb 8, 2018

Viewtree observer

Mobile Developer - Wenjuan
authored and
Mobile Developer - Wenjuan
committed
Viewtree observer improved

Mobile Developer - Wenjuan
authored and
Mobile Developer - Wenjuan
committed