如何在Swift iOS应用程序中激活PHFComposeBarView控件？

作为iOS开发的相对障碍，我正在努力使我的Swift iOS应用程序中的控件变得活跃

在和中斜视Obj-C后，我已尽力将基本设置转换为Swift，以便控件显示在主视图中：

但是，我还没有成功地使控件以编程方式激活

我已经在Swift 2.0/XCode 7.0 Beta 2中创建了一个ViewController，其外观如下：

ViewController.swift：

import UIKit
import PHFComposeBarView

class ViewController: UIViewController, PHFComposeBarViewDelegate {

    var composeBar: PHFComposeBarView {
        let viewBounds = self.view.bounds
        let frame = CGRectMake(0.0, viewBounds.size.height - PHFComposeBarViewInitialHeight, viewBounds.size.width, PHFComposeBarViewInitialHeight)
        let composeBarView = PHFComposeBarView(frame: frame)
        composeBarView.delegate = self
        return composeBarView
    }

    override var inputAccessoryView: UIView {
        return self.composeBar
    }

    override func canBecomeFirstResponder() -> Bool {
        return true
    }

    override func viewDidAppear(animated: Bool) {
        print("viewDidAppear self \(self)")
        print("composeBar.delegate \(self.composeBar.delegate)")
        print("composeBar.textView.delegate \(self.composeBar.textView.delegate)")
        print("composeBar.canBecomeFirstResponder() \(self.composeBar.canBecomeFirstResponder())")
        print("composeBar.textView.canBecomeFirstResponder() \(self.composeBar.textView.canBecomeFirstResponder())")
        let res = self.composeBar.becomeFirstResponder()
        print("composeBar.becomeFirstResponder() \(res)")
        print("composeBar.isFirstResponder() \(self.composeBar.isFirstResponder())")
        print("composeBar.textView.isFirstResponder() \(self.composeBar.textView.isFirstResponder())")
    }

}

import UIKit
import PHFComposeBarView

class ViewController: UIViewController, PHFComposeBarViewDelegate {

    @IBOutlet weak var composeBarView: PHFComposeBarView!

    override func viewDidLoad() {
        super.viewDidLoad()
        composeBarView.delegate = self
    }

    override func canBecomeFirstResponder() -> Bool {
        return true
    }

    override var inputAccessoryView: UIView {
        composeBarView.removeFromSuperview()
        return composeBarView
    }

}

控制台：

viewDidAppear self <SwiftPHFComposeBarTest.ViewController: 0x7fe088619d90>
composeBar.delegate Optional(<SwiftPHFComposeBarTest.ViewController: 0x7fe088619d90>)
composeBar.textView.delegate Optional(<PHFDelegateChain: 0x7fe088654850>)
composeBar.canBecomeFirstResponder() true
composeBar.textView.canBecomeFirstResponder() true
composeBar.becomeFirstResponder() false
composeBar.isFirstResponder() false
composeBar.textView.isFirstResponder() false

viewdidisf
composeBar.delegate可选（）
composeBar.textView.delegate可选（）
composeBar.canBecomeFirstResponder（）true
composeBar.textView.canBecomeFirstResponder（）true
composeBar.becomeFirstResponder（）错误
composeBar.isFirstResponder（）false
composeBar.textView.isFirstResponder（）false

怎么可能

composeBar.canBecomeFirstResponder（）

返回

true

但

composeBar.becomeFirstResponder（）

返回

false

另外，我不确定代理是否是可选的

---

编辑：已更新以包含调试输出。嗯，一种解决方案似乎是：

ViewController.swift：

import UIKit
import PHFComposeBarView

class ViewController: UIViewController, PHFComposeBarViewDelegate {

    var composeBar: PHFComposeBarView {
        let viewBounds = self.view.bounds
        let frame = CGRectMake(0.0, viewBounds.size.height - PHFComposeBarViewInitialHeight, viewBounds.size.width, PHFComposeBarViewInitialHeight)
        let composeBarView = PHFComposeBarView(frame: frame)
        composeBarView.delegate = self
        return composeBarView
    }

    override var inputAccessoryView: UIView {
        return self.composeBar
    }

    override func canBecomeFirstResponder() -> Bool {
        return true
    }

    override func viewDidAppear(animated: Bool) {
        print("viewDidAppear self \(self)")
        print("composeBar.delegate \(self.composeBar.delegate)")
        print("composeBar.textView.delegate \(self.composeBar.textView.delegate)")
        print("composeBar.canBecomeFirstResponder() \(self.composeBar.canBecomeFirstResponder())")
        print("composeBar.textView.canBecomeFirstResponder() \(self.composeBar.textView.canBecomeFirstResponder())")
        let res = self.composeBar.becomeFirstResponder()
        print("composeBar.becomeFirstResponder() \(res)")
        print("composeBar.isFirstResponder() \(self.composeBar.isFirstResponder())")
        print("composeBar.textView.isFirstResponder() \(self.composeBar.textView.isFirstResponder())")
    }

}

import UIKit
import PHFComposeBarView

class ViewController: UIViewController, PHFComposeBarViewDelegate {

    @IBOutlet weak var composeBarView: PHFComposeBarView!

    override func viewDidLoad() {
        super.viewDidLoad()
        composeBarView.delegate = self
    }

    override func canBecomeFirstResponder() -> Bool {
        return true
    }

    override var inputAccessoryView: UIView {
        composeBarView.removeFromSuperview()
        return composeBarView
    }

}

---

快速搜索“input accessoryview becomefirstresponder”返回：谢谢Philipe。遗憾的是，添加了一个

self.view.window！。makeKeyAndVisible（）

到我的

ViewDidDisplay（）方法的末尾没有区别。不过，我注意到，在iOS 9 beta版和iOS 8.3版中，我的行为有所不同，点击控件确实会像8.3版中所预期的那样显示键盘，但在尝试键入字符时，会出现
EXC_BAD_ACCESS
异常。我会看看是否可以缩小到iOS版本的问题。嗯，似乎不是这样，PHFComposeBarView示例应用程序在8.3和9.0测试版中运行良好。抱歉，不确定它可能是什么。试着使用一个简单的文本视图，看看它是否有效，然后从那里排除故障。祝你好运注意：Post更新为包含调试输出。打开textview后，您是否在textview内检查了轻敲2次。。？？它会消失的。。