【发布时间】:2015-06-16 05:04:59
【问题描述】:
我想在button click 和button long click 上触发两个操作。我在界面生成器中添加了UIbutton。我如何使用IBAction 触发两个操作,有人可以告诉我如何存档吗?
这是我用来点击按钮的代码
@IBAction func buttonPressed (sender: UIButton) {
....
}
我可以使用这种方法还是必须使用其他方法进行长按?
【问题讨论】:
我想在button click 和button long click 上触发两个操作。我在界面生成器中添加了UIbutton。我如何使用IBAction 触发两个操作,有人可以告诉我如何存档吗?
这是我用来点击按钮的代码
@IBAction func buttonPressed (sender: UIButton) {
....
}
我可以使用这种方法还是必须使用其他方法进行长按?
【问题讨论】:
如果您想通过单击执行任何操作并长按您可以通过这种方式将手势添加到按钮中:
@IBOutlet weak var btn: UIButton!
override func viewDidLoad() {
let tapGesture = UITapGestureRecognizer(target: self, #selector (tap)) //Tap function will call when user tap on button
let longGesture = UILongPressGestureRecognizer(target: self, #selector(long)) //Long function will call when user long press on button.
tapGesture.numberOfTapsRequired = 1
btn.addGestureRecognizer(tapGesture)
btn.addGestureRecognizer(longGesture)
}
@objc func tap() {
print("Tap happend")
}
@objc func long() {
print("Long press")
}
这样你可以为单个按钮添加多个方法,你只需要那个按钮的 Outlet ..
【讨论】:
@IBAction func buttonPressed (sender: UIButton),我可以通过编程方式添加方法吗?
@IBOutlet weak var countButton: UIButton!
override func viewDidLoad() {
super.viewDidLoad()
addLongPressGesture()
}
@IBAction func countAction(_ sender: UIButton) {
print("Single Tap")
}
@objc func longPress(gesture: UILongPressGestureRecognizer) {
if gesture.state == UIGestureRecognizerState.began {
print("Long Press")
}
}
func addLongPressGesture(){
let longPress = UILongPressGestureRecognizer(target: self, action: #selector(longPress(gesture:)))
longPress.minimumPressDuration = 1.5
self.countButton.addGestureRecognizer(longPress)
}
【讨论】:
为什么不创建一个自定义 UIButton 类,创建一个协议并让按钮将信息发送回委托。像这样的:
//create your button using a factory (it'll be easier of course)
//For example you could have a variable in the custom class to have a unique identifier, or just use the tag property)
func createButtonWithInfo(buttonInfo: [String: Any]) -> CustomUIButton {
let button = UIButton(type: .custom)
button.tapDelegate = self
/*
Add gesture recognizers to the button as well as any other info in the buttonInfo
*/
return button
}
func buttonDelegateReceivedTapGestureRecognizerFrom(button: CustomUIButton){
//Whatever you want to do
}
【讨论】: