如何在 swift ios 中以编程方式添加多个文本字段

Question

我试图通过运行循环显示多个 textFields，无论文本字段的数量 noTextField 是否大于零（这是一个输入值），它应该在 ViewController.

上显示多个文本字段

这是我有一个文本字段并打印多个 hello 但无法显示多个文本字段。

我有什么

enter image description here

我想要什么

enter image description here

            if self.noTextFields! > 0 {
            for _ in 0..<self.noTextFields! {
               // self.createForm()
                print ("hello")


                let sampleTextField =  UITextField(frame: CGRect(x: 20, y: 100, width: 300, height: 40))
                sampleTextField.placeholder = "Enter text here"
                sampleTextField.font = UIFont.systemFont(ofSize: 15)
                sampleTextField.borderStyle = UITextBorderStyle.roundedRect
                sampleTextField.autocorrectionType = UITextAutocorrectionType.no
                sampleTextField.keyboardType = UIKeyboardType.default
                sampleTextField.returnKeyType = UIReturnKeyType.done
                sampleTextField.clearButtonMode = UITextFieldViewMode.whileEditing;
                sampleTextField.contentVerticalAlignment = UIControlContentVerticalAlignment.center
                sampleTextField.delegate = self as? UITextFieldDelegate
                self.view.addSubview(sampleTextField)

            }
        }

Answer 1

错误与更正：

检查 self.view 的子视图项目内容 self.view.items 值打印在日志中。
您还没有为要分配给任何增量位置的 +1 计数器文本字段分配 X/Y 位置，因此即使创建了新对象，它也会与之前的相同项目重叠。
我总是建议在调用 addSubview 时同时将文本字段对象放入数组中，紧接在 self.view.addSubview(sampleTextField) 调用之后。这将帮助我在需要修改/访问/解除分配时保存每个文本字段项的引用。
您还为每个文本字段对象设置了标签，因此如果您不想使用数组，最好使用 [self.view viewWithTag:tagNo] 调用从子视图中获取带有该标签的对象.

您的代码段将如下所示

     var xValue = 0,yValue =0
     var tagNo = 0  
     var textObjects = allocate new array.

     if self.noTextFields! > 0 {
                for _ in 0..<self.noTextFields! {
                   // self.createForm()
                    print ("hello")

                    let sampleTextField =  UITextField(frame: CGRect(x: xValue, y: yValue, width: 300, height: 40)) //Note that I have set xValue and yValue
                    sampleTextField.placeholder = "Enter text here"
                    sampleTextField.font = UIFont.systemFont(ofSize: 15)
                    sampleTextField.borderStyle = UITextBorderStyle.roundedRect
                    sampleTextField.autocorrectionType = UITextAutocorrectionType.no
                    sampleTextField.keyboardType = UIKeyboardType.default
                    sampleTextField.returnKeyType = UIReturnKeyType.done
                    sampleTextField.clearButtonMode = UITextFieldViewMode.whileEditing;
                    sampleTextField.contentVerticalAlignment = UIControlContentVerticalAlignment.center
                    sampleTextField.delegate = self as? UITextFieldDelegate
                    sampleTextField.tag = tagNo  //Note this line for tagNo
                    self.view.addSubview(sampleTextField)
                    textObjects.addObject:sampleTextField //Note this line for adding textfield to array for reference to get total items added

yValue = yValue + sampleTextField.frame.size.height + 20; //Added yValue to place another text view at bottom of initial one and 20px buffer for gap.
                }
            }

print "array:textObjects.count 中的文本对象总数

如果需要从视图中获取对象，其 self.view.viewwithTag(tagNo) 将 return 精确的文本字段。

Answer 2

您只需添加 y 的动态值（如果需要，添加 x）。

var counter = 30
var yValue = 0

in for loop you just need to add below code

let sampleTextField =  UITextField(frame: CGRect(x: 20, y: yValue, width: 300, height: 40))

yValue = Counter
//(space each textfield if 30 because height of textfield is 40)

counter = counter + 70

如何在 swift ios 中以编程方式添加多个文本字段

How to add multiple textfields programatically in swift ios

uitextfield

ios

swift