在 swift 中循环通过 uitextfield class 时无法获得带有标签的正确文本字段？

Question

 for subviews in self.profilescroll.subviews
    {
        if ((subviews is UITextField) && (subviews.tag == 0))
        {


            let btntext : UITextField = subviews as! UITextField
            btntext.resignFirstResponder()

        }

        if ((subviews is UITextField) && (subviews.tag == 1))
        {
            let btntext : UITextField = subviews as! UITextField
            btntext.resignFirstResponder()
        }
    }

这是我在文本字段中放置标签的地方。

 for i in 0 ..< 2
                    {
                        btnbudget = UITextField()
                        btnbudget.frame = CGRect(x: (CGFloat(i) * (((screenWidth - 160)/2) + 40)) + 40, y: 0, width: (screenWidth - 160)/2, height: 50)
                        btnbudget.font = UIFont(name: "Metropolis-SemiBold", size: 18)
                        btnbudget.layer.cornerRadius = 10.0
                        btnbudget.layer.borderWidth = 1.0
                        btnbudget.layer.borderColor = UIColor(hexString:"4B45A0").cgColor
                        btnbudget.tag = i
                        btnbudget.backgroundColor = UIColor(hexString: "#00000000")
                        btnbudget.text = budgetlist.object(at: i) as? String
                        btnbudget.textColor = UIColor(hexString:"4B45A0")
                        btnbudget.textAlignment = .center
                        btnbudget.delegate = self
                        budgetbtnview.addSubview(btnbudget)
}

其中 profilescroll 是具有 3 个文本字段的视图，我需要在其中找到标签值范围为 0 到 1 的文本字段。但出于某种原因，我没有找到正确的文本字段，因此键盘没有返回。

Answer 1

您已经为文本字段分配了标签号，不需要遍历所有子视图。

  textField.tag = 101

您可以直接使用标签号获取如下视图...

if let txtField = self.view.viewWithTag(101) as? UITextField {
    print(txtField.text)

}

确保您给查看的所有标签都应该是唯一的，否则您可能会看到不需要的视图。

Answer 2

给定的标签应该是唯一的...试试这个..

 for i in 100 ..< 102
{
btnbudget = UITextField()
btnbudget.frame = CGRect(x: (CGFloat(i) * (((screenWidth - 160)/2) + 40)) + 40, y: 0, width: (screenWidth - 160)/2, height: 50)
btnbudget.font = UIFont(name: "Metropolis-SemiBold", size: 18)
btnbudget.layer.cornerRadius = 10.0
btnbudget.layer.borderWidth = 1.0
btnbudget.layer.borderColor = UIColor(hexString:"4B45A0").cgColor
btnbudget.tag = i
btnbudget.backgroundColor = UIColor(hexString: "#00000000")
btnbudget.text = budgetlist.object(at: i) as? String
btnbudget.textColor = UIColor(hexString:"4B45A0")
btnbudget.textAlignment = .center
btnbudget.delegate = self
budgetbtnview.addSubview(btnbudget)
}

和....

for subviews in self.profilescroll.subviews
{
if ((subviews is UITextField) && (subviews.tag == 100))
{


let btntext : UITextField = subviews as! UITextField
btntext.resignFirstResponder()

}

if ((subviews is UITextField) && (subviews.tag == 101))
{
let btntext : UITextField = subviews as! UITextField
btntext.resignFirstResponder()
}
}

但是 self.view.viewWithTag(101) 方法比这个更合适

Answer 3

假设您有三个 UITextField 并且您已将 tags 设置为 0,1,2

现在，您可以简单地遍历 profilescroll

的所有 Subview

for case let textField as UITextField in self.profilescroll.subviews {
    if textField.tag == 0 {
        // do something
        return
    }
    else if textfield.tag == 1 {
      // do something 
      return
    }
    else if textfield.tag == 2 {
    // do something 
    return
    }
}

这也将忽略您的 subview 不是 UITextField 的情况，从而节省时间。

在 swift 中循环通过 uitextfield class 时无法获得带有标签的正确文本字段？

unable to get proper textfield with tag while looping through uitextfield class in swift?

uitextfield

ios

swift

xcode9.2