我想在點擊它時更改UIButton圖像

Question

我在CollectionViewController的標題中有2個按鈕。當我點擊其中一個我使用UIControlState - > .normal .selected更改這個按鈕的圖像。

override func viewDidLoad() { 
    super.viewDidLoad() 
    collectionView.delegate = self 
    collectionView.dataSource = self 

    engSwitchButton.setImage(#imageLiteral(resourceName: "abc"), for: .normal) 
    geoSwitchButton.setImage(#imageLiteral(resourceName: "abg"), for: .normal) 
    engSwitchButton.setImage(#imageLiteral(resourceName: "abc2"),for: UIControlState.selected) 
    geoSwitchButton.setImage(#imageLiteral(resourceName: "abg2"), for: UIControlState.selected) 


    engSwitchButton.tag = Language.english.rawInt 
    geoSwitchButton.tag = Language.georgian.rawInt 
} 



@IBAction func languageSwitchTapped(_ sender: UIButton) { 

    sender.isSelected = !sender.isSelected 



    selectedLanguage = Language(rawInt: sender.tag)! 
    collectionView.reloadData() 
} 

我想先點擊按鈕，返回到正常狀態，當我改變2d按鈕狀態時點擊它。

Answer 1

要在水龍頭上更改按鈕圖像，您應該使用UIControlState.highlighted。

因此改變：

engSwitchButton.setImage(#imageLiteral(resourceName: "abc2"),for: UIControlState.selected) 
    geoSwitchButton.setImage(#imageLiteral(resourceName: "abg2"), for: UIControlState.selected) 

要這樣：

engSwitchButton.setImage(#imageLiteral(resourceName: "abc2"),for: UIControlState.highlighted) 
    geoSwitchButton.setImage(#imageLiteral(resourceName: "abg2"), for: UIControlState.highlighted) 

Answer 2

@IBAction func yourFirstButton(_ sender: Any) { 
    firstButton.setImage(UIImage(named: "yourButtonPressedImage")!, for: .normal) 
    secondbutton.setImage(UIImage(named: "yourNormalImage")!, for: .normal) 


} 

，並在你的第二個按鈕@IBAction方法只是切換圖片的按鈕

@IBAction func yourSecondButton(_ sender: Any) { 
    secondButton.setImage(UIImage(named: "yourButtonPressedImage")!, for: .normal) 
    firsBbutton.setImage(UIImage(named: "yourNormalImage")!, for: .normal) 


}