UIPickerView won't allow changing font name and size via delegate's `attributedTitleForRow…`

问题

I use the following func to change the font color and font size, the color works but the font name and font size refuse to work.

func pickerView(pickerView: UIPickerView, attributedTitleForRow row: Int, forComponent component: Int) -> NSAttributedString? 

var myTitle = NSAttributedString(string: titleData, attributes: [NSFontAttributeName:UIFont(name: "Arial-BoldMT", size: 45)!, NSForegroundColorAttributeName:UIColor.whiteColor()])

any help?

Thx.

回答1:

I have a another option may be it helpfull for you..

Do all work that need for normal picker view : for more help UIPickerView make in Swift iOS

Now follow this step : - you can use method of viewForRow like this

func pickerView(pickerView: UIPickerView, viewForRow row: Int, forComponent component: Int, reusingView view: UIView!) -> UIView
{
    var pickerLabel = UILabel()
    pickerLabel.textColor = UIColor.blackColor()
    pickerLabel.text = "PickerView Cell Title"
   // pickerLabel.font = UIFont(name: pickerLabel.font.fontName, size: 15)
    pickerLabel.font = UIFont(name: "Arial-BoldMT", size: 15) // In this use your custom font
    pickerLabel.textAlignment = NSTextAlignment.Center
    return pickerLabel
}

Updated Swift 3

func pickerView(pickerView: UIPickerView, viewForRow row: Int, forComponent component: Int, reusingView view: UIView!) -> UIView
{
    let pickerLabel = UILabel()
    pickerLabel.textColor = UIColor.black
    pickerLabel.text = "PickerView Cell Title"
    // pickerLabel.font = UIFont(name: pickerLabel.font.fontName, size: 15)
    pickerLabel.font = UIFont(name: "Arial-BoldMT", size: 15) // In this use your custom font
    pickerLabel.textAlignment = NSTextAlignment.center
    return pickerLabel
}

May be it help full for you, I also used this in my project.

回答2:

You can declare the datasource for pickerview

let arrDataSource:[String] = ["row 1","row 2","row 3"]

then use this array of string as title for row in below function

func pickerView(pickerView: UIPickerView, viewForRow row: Int, forComponent component: Int, reusingView view: UIView!) -> UIView

{
    let pickerLabel = UILabel()
    pickerLabel.textColor = UIColor.blackColor()
    pickerLabel.text = arrDataSource[row]
     pickerLabel.font = UIFont(name: pickerLabel.font.fontName, size: 15)
    //pickerLabel.font = UIFont(name: "Arial-BoldMT", size: 15) // In this use your custom font
    pickerLabel.textAlignment = NSTextAlignment.Center
    return pickerLabel
 }

回答3:

SWIFT 3

func pickerView(_ pickerView: UIPickerView, viewForRow row: Int, forComponent component: Int, reusing view: UIView?) -> UIView {

    var string = ""

    let pickerLabel = UILabel()
    pickerLabel.textColor = UIColor.white
    pickerLabel.text = string
    pickerLabel.font = UIFont(name: "Rubik-Regular", size: 22) // In this use your custom font
    pickerLabel.textAlignment = .center

    return pickerLabel

}

回答4:

To further elaborate on https://stackoverflow.com/users/4020910/bennythenerd answer with UILabel I'd go with a bit more memory optimised solution that reuses the labels:

func pickerView(_ pickerView: UIPickerView, viewForRow row: Int, forComponent component: Int, reusing view: UIView?) -> UIView {
    let pickerLabel: UILabel
    if let label = view as? UILabel {
        pickerLabel = label
    } else {
        pickerLabel = UILabel()
        pickerLabel.font = UIFont(name: "Rubik-Regular", size: 22)
        pickerLabel.textAlignment = .center
    }
    pickerLabel.text = pickerData[row] //This is your string
    return pickerLabel
}

回答5:

Swift 4.1 / Xcode 9.4.1

Obviously you can select you own font, but here I'm using System Bold 13.

func pickerView(_ pickerView: UIPickerView, viewForRow row: Int, forComponent component: Int, reusing view: UIView?) -> UIView {
    let pickerLabel = UILabel()
    pickerLabel.font = UIFont.boldSystemFont(ofSize: 13)
    pickerLabel.textColor = UIColor.black
    pickerLabel.textAlignment = .center
    pickerLabel.text = "PickerView Cell Title"

    return pickerLabel
}

来源：https://stackoverflow.com/questions/27455345/uipickerview-wont-allow-changing-font-name-and-size-via-delegates-attributedt

标签

cocoa

fonts

size

uipickerview

nsattributedstring