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[英]SWIFT: Tapping a UIButton really fast results in incorrect vote count
[英]Swift Tapping on UIButton without response
addButton = UIButton(type: .custom)
addButton.setTitle("add", for: .normal)
addButton.setTitle("tapped", for: .highlighted)
addButton.titleLabel?.font = UIFont.systemFont(ofSize: 12)
addButton.backgroundColor = UIColor.lightGray
addButton.translatesAutoresizingMaskIntoConstraints = false
addButton.addTarget(self, action: #selector(dosome(_:)), for: .touchUpInside)
let bottom_button: NSLayoutConstraint = NSLayoutConstraint(item: addButton, attribute: NSLayoutAttribute.bottom, relatedBy:NSLayoutRelation.equal, toItem:mainView, attribute:NSLayoutAttribute.bottom, multiplier:1.0, constant: -10)
let right_button: NSLayoutConstraint = NSLayoutConstraint(item: addButton, attribute: NSLayoutAttribute.right, relatedBy:NSLayoutRelation.equal, toItem:mainView, attribute:NSLayoutAttribute.right, multiplier:1.0, constant: -20)
let height_button: NSLayoutConstraint = NSLayoutConstraint(item: addButton, attribute: NSLayoutAttribute.height, relatedBy:NSLayoutRelation.equal, toItem:nil, attribute:.notAnAttribute, multiplier:1.0, constant: 20)
let width_button: NSLayoutConstraint = NSLayoutConstraint(item: addButton, attribute: NSLayoutAttribute.width, relatedBy:NSLayoutRelation.equal, toItem:nil, attribute:.notAnAttribute, multiplier:1.0, constant: 35)
addButton.addConstraint(height_button)
addButton.addConstraint(width_button)
mainView.addSubview(addButton)
mainView.addConstraint(bottom_button)
mainView.addConstraint(right_button)
@IBAction func dosome(_ sender: UIButton) {
print("tttttt")
}
點擊后,按鈕的文本將變為突出顯示的標題,而無需進行操作。 任何人都可以指出出什么問題了嗎?
使用addButton.isHighlighted = false
它將起作用。
試試這個, addButton = UIButton(type: .system)
theButton.adjustsImageWhenHighlighted = false;
addButton = UIButton(type: .system)
並設置theButton.adjustsImageWhenHighlighted = false;
我只是嘗試了一下,效果很好。 刪除約束后,可以根據需要添加約束。 確保在此addButton上方沒有tapGesture或userInteractionEnabled視圖,這導致未調用IBAction方法。
let addButton = UIButton(type: .custom)
addButton.setTitle("add", for: .normal)
addButton.setTitle("tapped", for: .highlighted)
addButton.titleLabel?.font = UIFont.systemFont(ofSize: 12)
addButton.backgroundColor = UIColor.lightGray
addButton.translatesAutoresizingMaskIntoConstraints = false
addButton.addTarget(self, action: #selector(self.dosome(_:)), for: .touchUpInside)
self.view.addSubview(addButton)
func dosome(_ sender: UIButton) {
print("tttttt")
}
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