問題描述

我有一個(gè) Ext.navigation.View，我在其中推送了一些視圖.某些用戶交互要求我直接返回導(dǎo)航視圖的頂層——相當(dāng)于 iOS 中 UINavigationController 上的 popToRootViewControllerAnimated:.

I have an Ext.navigation.View in which I have pushed a few views. Certain user interactions require that I go directly back to the top level of the navigation view -- the equivalent of popToRootViewControllerAnimated: on a UINavigationController in iOS.

我嘗試過各種方法，例如:

I have tried various things like:

while(navigationView.getItems().getCount() > 1)
    navigationView.pop();

和

while(navigationView.canPop())
    navigationView.pop();

都不行.第一個(gè)例子似乎讓我陷入了無限循環(huán)，這并不奇怪.第二個(gè)例子似乎只彈出一個(gè)視圖.

Neither work. The first example seems to put me into an infinite loop which isn't too surprising. The second example only seems to pop one view off.

所以問題是:在 Sencha Touch(版本 2 開發(fā)者預(yù)覽版)中的 Ext.navigation.View 中彈出到根視圖的正確方法是什么?

So the question: What is the proper way to pop to the root view in an Ext.navigation.View in Sencha Touch (version 2 developer preview)?

推薦答案

有許多臨時(shí)方法可以實(shí)現(xiàn)這一目標(biāo).

There has been a number of interim methods for achieving this.

我使用的是彈出一個(gè)比你曾經(jīng)擁有的級(jí)別數(shù)更高的數(shù)字，例如

The one I was using was to pop a number higher than the number of levels you would ever have e.g.

navigationView.pop(10);

效果很好，但我對此并不滿意，但我看到他們現(xiàn)在引入了一種重置方法.你可以這樣稱呼它......

and that worked fine, but I was never happy with that, but I see they have now introduced a reset method. Which you can call thus...

navigationView.reset();

在 Sencha 源代碼內(nèi)部(見下文)，您可以看到它與 @Mithralas 所說的工作類似，但更容易編寫.

Internally within the Sencha source code (see below) you can see that it does a similar job to what @Mithralas said, but just easier to write.

// From the Sencha source code
this.pop(this.getInnerItems().length);

這篇關(guān)于Sencha Touch Ext.navigation.View pop to root的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網(wǎng)！