WeChat applet jump analysis

The triggering method of the route and the page life cycle function are as follows:

routing	Trigger timing	pre-routing page	post-routing page
initialization	The first page opened by the applet		onLoad, onShow
open new page	Call API  wx.navigateTo or use components <navigator open-type="navigateTo"/>	onHide	onLoad, onShow
page redirection	Call API  wx.redirectTo or use components <navigator open-type="redirectTo"/>	onUnload	onLoad, onShow
page back	Call the API  wx.navigateBack or use the component <navigator open-type="navigateBack">or the user presses the top left back button	onUnload	onShow
Tab switching	Call API  wx.switchTab or use component  <navigator open-type="switchTab"/> or user to switch Tab		Please refer to the table below for various situations
reboot	Call API  wx.reLaunch or use components <navigator open-type="reLaunch"/>	onUnload	onLoad, onShow

The life cycle corresponding to Tab switching (take A and B pages as Tabbar pages, C is a page opened from A page, and D page is a page opened from C page as an example):

The current page	post-routing page	Triggered lifecycles (in order)
A	A	Nothing happend
A	B	A.onHide(), B.onLoad(), B.onShow()
A	B (open again)	A.onHide(), B.onShow()
C	A	C.onUnload(), A.onShow()
C	B	C.onUnload(), B.onLoad(), B.onShow()
D	B	D.onUnload(), C.onUnload(), B.onLoad(), B.onShow()
D (enter from forward)	A	D.onUnload(), A.onLoad(), A.onShow()
D (enter from forward)	B	D.onUnload(), B.onLoad(), B.onShow()

Tips:

• navigateTo,  redirectTo can only open non-tabBar pages.
• switchTab Only tabBar pages can be opened.
• reLaunch Any page can be opened.
• The tabBar at the bottom of the page is determined by the page, that is, as long as it is a page defined as tabBar, there is a tabBar at the bottom.
• The parameters of the calling page routing can be obtained in the target page onLoad.