Setting font for UITextfield place holder in swift

问题

I used the following code for setting different font for UITextfield's text(16) and placeholder(9),

m_searchTextField.font = UIFont .systemFontOfSize(16)
let font = UIFont .systemFontOfSize(9)
let attributes = [
        NSForegroundColorAttributeName: UIColor.lightGrayColor(),
        NSFontAttributeName : font]

 m_searchTextField.attributedPlaceholder = NSAttributedString(string: "Search String be in meddle left",
        attributes:attributes)

Font size is set correctly, but the placeholder text sets somewhat upper in the textfield.

How can I fix this issue? Any Suggestions?

回答1:

I fixed this issue programmatically, since I could not find any other way to fix it.

Code below:

class ViewController: UIViewController {

    @IBOutlet weak var textField: UITextField!
    var placeholder : UILabel!

    override func viewDidLoad() {
        super.viewDidLoad()

        placeholder = UILabel(frame: CGRect( x: 0, y: 0, width: textField.bounds.width, height: textField.bounds.height))
        placeholder.text = "Search String be in meddle left"
        placeholder.font = UIFont.italicSystemFontOfSize(9)
        placeholder.textColor = UIColor.grayColor()
        placeholder.hidden = !textField.text!.isEmpty
        placeholder.textAlignment = .Center
        textField.addSubview(placeholder)
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
    }

    @IBAction func textField_EditingChanged(sender: AnyObject) {
        placeholder.hidden = !textField.text!.isEmpty
    }
} 

来源：https://stackoverflow.com/questions/33842112/setting-font-for-uitextfield-place-holder-in-swift