如何保持按钮被选中?
How to keep a button selected?
我正在尝试使用 AVPlayer 创建循环按钮。当用户点击一个按钮(循环)时,我希望它保持选中状态,直到用户再次点击它以取消选择它。我有以下代码,但它似乎不起作用。谢谢!
@IBAction func didTapLoopButton(_ sender: Any) {
guard let loopButton = sender as? UIButton else {
return
}
if loopButton.state == .selected {
print("selected")
} else {
print("deselected")
}
}
试试这个:
@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
}
综合上述问答:
@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")
}
}
我正在尝试使用 AVPlayer 创建循环按钮。当用户点击一个按钮(循环)时,我希望它保持选中状态,直到用户再次点击它以取消选择它。我有以下代码,但它似乎不起作用。谢谢!
@IBAction func didTapLoopButton(_ sender: Any) {
guard let loopButton = sender as? UIButton else {
return
}
if loopButton.state == .selected {
print("selected")
} else {
print("deselected")
}
}
试试这个:
@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
}
综合上述问答:
@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")
}
}