Question

在我的代码中：

@IBOutlet weak var textField: UITextField!

@IBAction func textField(sender: AnyObject) {

    if textField.text != "" {
        let newSweet = CKRecord(recordType: "Chat")
        newSweet["content"] = textField.text
        textField.delegate = self
        let publicData = CKContainer.defaultContainer().publicCloudDatabase
        publicData.saveRecord(newSweet, completionHandler: { (record:CKRecord?, error:NSError?) -> Void in
            if error == nil {
                dispatch_async(dispatch_get_main_queue(), { () -> Void in
                    self.tableView.beginUpdates()
                    self.sweets.insert(newSweet, atIndex: 0)
                    let indexPath = NSIndexPath(forRow: 0, inSection: 0)
                    self.tableView.insertRowsAtIndexPaths([indexPath], withRowAnimation:
                        .Top)
                    func textFieldShouldReturn(textField: UITextField) -> Bool {
                        self.textField.resignFirstResponder()

                        return true
                    }})

            }else{
                print(error)
                }
        })
   }
}

我正在尝试访问cloudKit，因此当您在UITextField中输入内容时，它会激活UITextField @IBAction。现在当我在UITextField输入文字时发生了什么事情，所以我需要它来激活@IBAction。有没有人有办法解决吗？

Answer 1

在您的ViewController中，导入协议UITextFieldDelegate，如下所示：

class YourViewController: UIViewController,UITextFieldDelegate

你viewDidLoad中的

是这样的：

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

您必须安装委托方法：

func textFieldDidBeginEditing(textField: UITextField!) {
        let newSweet = CKRecord(recordType: "Chat")
        newSweet["content"] = textField.text
        textField.delegate = self
        let publicData = CKContainer.defaultContainer().publicCloudDatabase
        publicData.saveRecord(newSweet, completionHandler: { (record:CKRecord?, error:NSError?) -> Void in
            if error == nil {
                dispatch_async(dispatch_get_main_queue(), { () -> Void in
                    self.tableView.beginUpdates()
                    self.sweets.insert(newSweet, atIndex: 0)
                    let indexPath = NSIndexPath(forRow: 0, inSection: 0)
                    self.tableView.insertRowsAtIndexPaths([indexPath], withRowAnimation:
                        .Top)
                    func textFieldShouldReturn(textField: UITextField) -> Bool {
                        self.textField.resignFirstResponder()

                        return true
                    }})

}

如果您想点击Return上的Keyboard将关闭键盘，则必须安装此TextFieldDelegate方法

func textFieldShouldReturn(textField: UITextField) -> Bool {
        self.textField.resignFirstResponder()
        return true
    }

Answer 2

使用此委托方法

class ViewController: UIViewController,UITextFieldDelegate  //set delegate to class 

@IBOutlet var txtValue: UITextField             //create a textfile variable 

override func viewDidLoad() {
    super.viewDidLoad()
    txtValue.delegate = self                  //set delegate to textfile
}


func textFieldDidBeginEditing(textField: UITextField!) {    //delegate method

let newSweet = CKRecord(recordType: "Chat")
        newSweet["content"] = textField.text
        textField.delegate = self
        let publicData = CKContainer.defaultContainer().publicCloudDatabase
        publicData.saveRecord(newSweet, completionHandler: { (record:CKRecord?, error:NSError?) -> Void in
            if error == nil {
                dispatch_async(dispatch_get_main_queue(), { () -> Void in
                    self.tableView.beginUpdates()
                    self.sweets.insert(newSweet, atIndex: 0)
                    let indexPath = NSIndexPath(forRow: 0, inSection: 0)
                    self.tableView.insertRowsAtIndexPaths([indexPath], withRowAnimation:
                        .Top)
                func textFieldShouldReturn(textField: UITextField) -> Bool {
                    self.textField.resignFirstResponder()

                    return true
}

func textFieldShouldEndEditing(textField: UITextField!) -> Bool {  //delegate method
    return false
}

func textFieldShouldReturn(textField: UITextField!) -> Bool {   //delegate method
  textField.resignFirstResponder()

    return true
}

Swift：点击textField开始动作

2 个答案: