在单击UIBarButton显示吐司上和在双击后动作上都需要执行 [英] on single tap UIBarButton display toast and on double tap back action need to perform
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问题描述
我在导航栏中有一个UIBarButton,在单击后退按钮(第一次点击)时,我需要显示吐司(如警告),在双击时,我需要迅速退出页面,
I have an UIBarButton in navigation bar, while clicking on back button (first tap) i need to display toast (like warning), on double tap i need to exit from the page in swift,
以下用于显示吐司面包的代码,它的工作正常,
Following codes used for displaying toast, its working fine,
let toastLabel = UILabel(frame: CGRect(x: 20, y: self.view.frame.size.height-100, width: 350, height: 35))
toastLabel.backgroundColor = UIColor.black.withAlphaComponent(0.6)
toastLabel.textColor = UIColor.white
toastLabel.textAlignment = .center;
toastLabel.font = UIFont(name: "Montserrat-Light", size: 12.0)
toastLabel.text = "demo"
toastLabel.alpha = 1.0
toastLabel.layer.cornerRadius = 10;
toastLabel.clipsToBounds = true
self.view.addSubview(toastLabel)
UIView.animate(withDuration: 2.0, delay: 0.1, options: .curveEaseOut, animations: {
toastLabel.alpha = 0.0
}, completion: {(isCompleted) in
toastLabel.removeFromSuperview()
})
请指导我完成这项任务.
please guide me to acheive this task.
推荐答案
override func viewDidLoad() {
super.viewDidLoad()
self.navigationItem.hidesBackButton = true
let button = UIButton(type: .system)
button.frame = CGRect(x: 0, y: 0, width: 80, height: 40)
button.setTitle("Back", for: .normal)
//Gesture Recognizer
let singleTap = UITapGestureRecognizer(target: self, action: #selector(handleSingleTap))
singleTap.numberOfTapsRequired = 1
let doubleTap = UITapGestureRecognizer(target: self, action: #selector(handleDoubleTap))
doubleTap.numberOfTapsRequired = 2
button.addGestureRecognizer(singleTap)
button.addGestureRecognizer(doubleTap)
singleTap.require(toFail: doubleTap)
let barButton = UIBarButtonItem(customView: button)
self.navigationItem.leftBarButtonItem = barButton
}
@objc func handleSingleTap(sender: UITapGestureRecognizer? = nil) {
let toastLabel = UILabel(frame: CGRect(x: 20, y: self.view.frame.size.height-100, width: 350, height: 35))
toastLabel.backgroundColor = UIColor.black.withAlphaComponent(0.6)
toastLabel.textColor = UIColor.white
toastLabel.textAlignment = .center;
toastLabel.font = UIFont(name: "Montserrat-Light", size: 12.0)
toastLabel.text = "demo"
toastLabel.alpha = 1.0
toastLabel.layer.cornerRadius = 10;
toastLabel.clipsToBounds = true
self.view.addSubview(toastLabel)
UIView.animate(withDuration: 2.0, delay: 0.1, options: .curveEaseOut, animations: {
toastLabel.alpha = 0.0
}, completion: {(isCompleted) in
toastLabel.removeFromSuperview()
})
print("Single Tap detected")
}
@objc func handleDoubleTap(sender: UITapGestureRecognizer? = nil) {
print("Double Tap detected")
}
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