如何選擇一個按鈕？

Question

我想創建一個使用AVPlayer的循環按鈕。當用戶點擊一個按鈕（循環）時，我希望它保持選中狀態，直到用戶再次點擊它以取消選擇它爲止。我有以下代碼，但它似乎並沒有工作。謝謝！

@IBAction func didTapLoopButton(_ sender: Any) { 
    guard let loopButton = sender as? UIButton else { 
     return 
    } 

    if loopButton.state == .selected { 
     print("selected") 


    } else { 
     print("deselected") 
    } 
} 

Answer 1

試試這個：

@IBAction func didTapLoopButton(_ sender: Any) { 
    guard let loopButton = sender as? UIButton else { 
     return 
    } 

    let selected = !loopButton.isSelected 

    if selected { 
     print("selected") 
    } else { 
     print("deselected") 
    } 

    loopButton.isSelected = selected 
} 

Answer 2

從問題結合以上回答：

@IBAction func didTapLoopButton(_ sender: Any) { 
    guard let loopButton = sender as? UIButton else { 
     return 
    } 

    loopButton.isSelected = !loopButton.isSelected 

    if loopButton.state == .selected { 
     print("selected") 


    } else { 
     print("deselected") 
    } 
}