ios - keyboardWillShow 如何在 Swift iOS 中仅应用于 1 个 textView

Question

我们有一个看起来像这样的应用程序:

App here

我们在 View 的顶部和底部都有 UITextViews，我一直在寻求帮助，以便在 keyboard 出现时向上移动屏幕。

它实际上工作得很好，但我想知道如何只将它应用于屏幕底部的 UITextView (textViewInteriorDos)，它之前正在触摸键盘.如何在这个方法中正确应用 if/else 语句？？

顶部的 UITextView 没有被键盘覆盖，所以我们不需要它。

class viewControllerCuatro: UIViewController, UITextViewDelegate {

@IBOutlet weak var textViewInteriorUno: UITextView!
@IBOutlet weak var textViewInteriorDos: UITextView!

override func viewDidLoad() {


    self.navigationItem.backBarButtonItem = UIBarButtonItem(title: "Atrás", style: UIBarButtonItemStyle.Plain, target: nil, action: nil)


    **NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardWillShow:"), name:UIKeyboardWillShowNotification, object: self.view.window)
    NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardWillHide:"), name:UIKeyboardWillHideNotification, object: self.view.window)**




}


    func keyboardWillShow(sender: NSNotification) 
{
        // 1
        let userInfo: [NSObject : AnyObject] = sender.userInfo!
        // 2
        let keyboardSize: CGSize = userInfo[UIKeyboardFrameBeginUserInfoKey]!.CGRectValue.size
        let offset: CGSize = userInfo[UIKeyboardFrameEndUserInfoKey]!.CGRectValue.size
        // 3
        if keyboardSize.height == offset.height {
            UIView.animateWithDuration(0.1, animations: { () -> Void in
                self.view.frame.origin.y -= keyboardSize.height
            })
        } else {
            UIView.animateWithDuration(0.1, animations: { () -> Void in
                self.view.frame.origin.y += keyboardSize.height - offset.height
            })
            }


    }
func keyboardWillHide(sender: NSNotification) {
            let userInfo: [NSObject : AnyObject] = sender.userInfo!
            let keyboardSize: CGSize = userInfo[UIKeyboardFrameBeginUserInfoKey]!.CGRectValue.size
            self.view.frame.origin.y += keyboardSize.height
        }
override func viewWillDisappear(animated: Bool) {
        NSNotificationCenter.defaultCenter().removeObserver(self, name: UIKeyboardWillShowNotification, object: self.view.window)
        NSNotificationCenter.defaultCenter().removeObserver(self, name: UIKeyboardWillHideNotification, object: self.view.window)
    }

 override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {

    if textViewInteriorUno.text == ""  || textViewInteriorUno.text.isEmpty == true || textViewInteriorDos.text == "" || textViewInteriorDos.text.isEmpty == true {


        textViewInteriorUno.resignFirstResponder()


        textViewInteriorDos.resignFirstResponder()
    }
    else{

        self.textViewInteriorUno.resignFirstResponder()

        self.textViewInteriorDos.resignFirstResponder()
    }
}

func textView(textView: UITextView, shouldChangeTextInRange range: NSRange, replacementText text: String) -> Bool{

    var shouldReplace = true // For most cases, return true, only modify if we have a special case

    // If the textView is 'textViewInteriorUno'
    if textView.isEqual(textViewInteriorUno) {

    let newLength = textViewInteriorUno.text.utf16.count + text.utf16.count - range.length
    shouldReplace = newLength <= 12           // will be true if the length is <= 12

    }

    else if textView.isEqual(textViewInteriorDos) {

    let newLength = textViewInteriorDos.text.utf16.count + text.utf16.count - range.length
    shouldReplace = newLength < 13 // Will be true if the length > 6


    }

    return shouldReplace
}

Answer 1

我认为它可以帮助你如下

准备:

@IBOutlet weak var textSkillSearch: UITextView!

@IBOutlet weak var textWillSearch: UITextView!

1. 标记添加观察者的通知

覆盖函数 viewDidLoad() { super.viewDidLoad()

NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(MainViewController.textViewDidBeginEditing(_:)), name:UIKeyboardWillShowNotification, object: nil);
NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(MainViewController.keyboardWillHide(_:)), name:UIKeyboardWillHideNotification, object: nil);

self.textWillSearch.delegate = self
self.textSkillSearch.delegate = self

1. 键盘事件和 TextView 事件。

////

func textViewDidBeginEditing(textView: UITextView) {
    if textView == textWillSearch {
        self.view.frame.origin.y = -130
    }
 }

func textViewDidEndEditing(textView: UITextView) {
    self.view.frame.origin.y = 0
}

func keyboardWillHide(sender: NSNotification) {
    self.view.frame.origin.y = 0
}

deinit {
    NSNotificationCenter.defaultCenter().removeObserver(self)
}

// called when 'return' key pressed. return NO to ignore.
func textViewShouldEndEditing(textView: UITextView) -> Bool {
    textView.resignFirstResponder()
    return true
}

// called when users tap out of textfield
override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
    self.view.endEditing(true)
}