ExtJS教程汇总：https://www.cnblogs.com/cqpanda/p/16328016.html
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更新记录
2023年1月5日 初始化。
NavigationView is basically a Ext.Container with a Ext.layout.Card layout, so only one view can be visible at a time. However, NavigationView also adds extra functionality on top of this to allow you to push and pop views at any time.
{
xtype: 'navigationview',
id: 'navigationviewId',
width: 300,
height: 300,
items: [
{
title: 'First',
items: [
{
xtype: 'button',
text: 'Push a new view!',
handler: function() {
// use the push() method to push another view. It works much like
// add() or setActiveItem(). it accepts a view instance, or you can give it
// a view config.
let navigationview = Ext.ComponentQuery.query('#navigationviewId')[0];
navigationview.push({
title: 'Second',
html: 'Second view!'
});
}
}
]
}
]
}