我在一个单独的类中有此功能:
public static func TextField(x:CGFloat=0, y:CGFloat=0, width: CGFloat=0, height: CGFloat=0, placeholder: String="", fontSize:CGFloat=15, fontColor: UIColor=UIColor.black, fontWeight:UIFont.Weight=UIFont.Weight.light ,passwordField: Bool = false) -> UITextField{
weak var delegate: UITextFieldDelegate?
let textfield = UITextField(frame: CGRect(x: x, y: y, width: width, height: height))
textfield.placeholder = placeholder
textfield.textColor = fontColor
textfield.font = UIFont.systemFont(ofSize: fontSize, weight: fontWeight)
textfield.isSecureTextEntry = passwordField
textfield.isUserInteractionEnabled = true
textfield.autocorrectionType = UITextAutocorrectionType.no
textfield.keyboardType = UIKeyboardType.default
textfield.contentVerticalAlignment = UIControlContentVerticalAlignment.center
textfield.delegate = delegate
return textfield
}
它以正确的行为正确创建了
UITextField
,我无法键入任何UITextFields
。另外,我尝试添加一个单独的类,如下所示:
class MyTextFieldDelegate : NSObject, UITextFieldDelegate{
func textFieldShouldReturn(textField: UITextField!) -> Bool{
textField.resignFirstResponder()
return true;
}
}
但是没有用。
另外,阅读this StackOverflow post
unowned(unsafe) var delegate: UITextFieldDelegate?
返回错误:
“未拥有”仅适用于类和类绑定的协议类型,
不是“ UITextFieldDelegate?”
我怎么不能在我的
UITextfield
上写? 最佳答案
您需要创建一个带有强引用的静态let变量,以便在工厂函数中使用它(遵循Swift名称约定,并以makeDefaultTextField为例进行调用),并且在分配委托时要使其更加清晰,您有责任管理类的委托方法:
static let myDelegate = MyTextFieldDelegate()
public static func makeDefaultTextField(x:CGFloat=0, y:CGFloat=0, width: CGFloat=0, height: CGFloat=0, placeholder: String="", fontSize:CGFloat=15, fontColor: UIColor=UIColor.black, fontWeight:UIFont.Weight=UIFont.Weight.light ,passwordField: Bool = false) -> UITextField {
let textfield = UITextField(frame: CGRect(x: x, y: y, width: width, height: height))
//....
textField.delegate = myDelegate
}
如果要在ViewController中管理委托方法(强烈建议),则可以通过这种方式进行,例如:
class YourViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
let txtField = YourClass.makeDefaultTextField()
txtField.delegate = self
}
}
extension YourViewController: UITextFieldDelegate {
//call here the methods
}