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ionic2 里的App和Nav

this.app.getRootNav()
this.navCtrl.push()有什么区别?
其实主要是没明白App这个组件和Nav有什么关联和区别?

还有,,
tabs组件切换tab的时候不刷新,有木有什么方法让切换的时候也刷新页面呢?
求教大神。


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第二个问题,你可以尝试一下官方API中NavController的生命周期,加入ionViewDidEnter(){}
图片描述


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