如何快速将UIlabel属性重置为默认设置

Question

I created a UIlabel named etiket . then I created an action button and I made changes like color change on it. it's a sample:

@IBAction func changeColor(_ sender: Any) {
    etiket.textColor = UIColor.red

then I created again an action button and now when I pressed the button I want to reset UIlabel to default settings.

I tried this method

@IBAction func sifirla(_ sender: Any) {
    etiket.text = "nil"

when I tried this method UIlabel completely disappeared.

How can I reset UIlabel attributes to default settings? I did some research, but I could not find exactly what I wanted.

Answer 1

You need to create a label dynamically and assign a tag value to it.

func createLabel() -> UILabel {
    let lbl = UILabel(frame: CGRect(x: 10, y: 10, width: 100, height: 55))
    lbl.tag = 101
    //set other properties of label
    return lbl
}

In changeColor method you need to get label by tag value and set its color.

@IBAction func changeColor(_ sender: Any) {

    if let lbl = self.view.viewWithTag(101) as? UILabel {
        lbl.textColor = UIColor.red
    }

}

In sifirla method you need to get label by tag value and remove it from its super view and create a new label and add it in your current view, so by adding a new UILabel instance you will get default settings of label.

@IBAction func sifirla(_ sender: Any) {

    if let lbl = self.view.viewWithTag(101) as? UILabel {
        lbl.removeFromSuperview()

        let newLbl = self.createLabel()
        self.view.addSubview(newLbl)
    }
}

Note: If you are using autolayout then you need to set constraint to label instead of frame.