Swift中的UIControlState

Question

這是我的代碼：

let font = UIFont(name: "AvenirNext-Regular", size: 16.0)
let attributes: NSDictionary? = [ NSFontAttributeName : font! ]
self.segmentedControl.setTitleTextAttributes(attributes, forState:.Normal)

我有一個錯誤“在最后一行找不到成員'Normal'。怎么了？

Answer 1

您需要將attributes為[NSObject : AnyObject] ，您的代碼將為：

segmentedControl.setTitleTextAttributes(attributes as [NSObject : AnyObject]?, forState: .Normal)

這是Apple Docs的默認語法：

func setTitleTextAttributes(_ attributes: [NSObject : AnyObject]?, forState state: UIControlState)

或者您可以將attributes [NSObject : AnyObject]?為[NSObject : AnyObject]? 當您創建它時，代碼將是：

let font = UIFont(name: "AvenirNext-Regular", size: 16.0)
let attributes: [NSObject : AnyObject]? = [ NSFontAttributeName : font! ]
self.segmentedControl.setTitleTextAttributes(attributes, forState: UIControlState.Normal)

Answer 2

更改代碼的以下行：

self.segmentedControl.setTitleTextAttributes(attributes, forState:.Normal)

對此：

self.segmentedControl.setTitleTextAttributes(attributes, forState: UIControlState.normal)

或者您也可以使用以下命令：

self.segmentedControl.setTitleTextAttributes(attributes as? [AnyHashable : Any], forState: UIControlState.normal)

Answer 3

它應該可以處理您的代碼。 您只需重新啟動xcode。

嘗試打擊代碼：

import UIKit

class ViewController: UIViewController {

    @IBOutlet var segment: UISegmentedControl!

    override func viewDidLoad() {
        super.viewDidLoad()


        let font = UIFont(name: "AvenirNext-Regular", size: 26.0)
        let attributes: NSDictionary? = [ NSFontAttributeName : font! ]
       segment.setTitleTextAttributes(attributes! as [NSObject : AnyObject], forState:.Normal)

        // Do any additional setup after loading the view, typically from a nib.
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

}