進度條描述的是一種加載的狀態，比如軟件升級下載進度， 視頻，圖片下載進度…

主要屬性：

wxml

<progress  percent="80" show-info="true"  stroke-width="5" color="red" active="true"/>

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hello WeApp                      icon組件
Window                             text組件                                switch組件
tabBar底部導航                 progress組件                        action-sheet
應用生命周期                    button組件                            modal組件
頁面生命周期                    checkbox組件                       toast組件
模塊化詳                           form組件詳                            loading 組件
數據綁定                           input 組件                             navigator 組件
View組件                          picker組件                             audio 組件
scroll-view組件                 radio組件                              video組件
swiper組件                        slider組件                              Image組件