ios - UIViewController 的委托(delegate)函数决定弹出
<p><p>我在导航堆栈中有 3 个 ViewController,它们是 ViewControllerA、ViewControllerB 和 ViewControllerC。</p>
<p>当我从 ViewControllerB 按下返回按钮时,我到达 ViewControllerA。 </p>
<p>我想检查我是如何到达 ViewControllerA 的,无论是通过弹回还是作为导航堆栈的 rootViewController。</p></p>
<br><hr><h1><strong>Best Answer-推荐答案</ strong></h1><br>
<p><p>你可以给你的 backButton 一个 unwind 函数并在 ViewController 中捕获它。 </p>
<pre><code>@IBAction func unwindToView(unwindSegue: UIStoryboardSegue) {
if let XControllerView = unwindSegue.sourceViewController as? XController {
print("Coming from XControllerView")
}
else if let YControllerView = unwindSegue.sourceViewController as? YController {
print("Coming from YControllerView")
}
}
</code></pre>
<p>有关放松的更多信息:<a href="https://developer.apple.com/documentation/uikit/uiviewcontroller/1621473-unwind" rel="noreferrer noopener nofollow">https://developer.apple.com/documentation/uikit/uiviewcontroller/1621473-unwind</a> </p></p>
<p style="font-size: 20px;">关于ios - UIViewController 的委托(delegate)函数决定弹出,我们在Stack Overflow上找到一个类似的问题:
<a href="https://stackoverflow.com/questions/50330462/" rel="noreferrer noopener nofollow" style="color: red;">
https://stackoverflow.com/questions/50330462/
</a>
</p>
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