是否可以从被认为是.touchDragExit（或.touchDragEnter）（不在其可选区域内）的按钮处自定义区域？
更具体地说，我正在谈论这种情况：我点击UIButton，调用了.touchDown，然后我开始将手指从按钮上拖开，并且在某个点（相隔一定距离）它将不再选择（当然，我可以向后拖动以选择...）。我想修改该距离...
这有可能吗？
答案 0 :(得分：1)
拖动区域实际上等于由边界定义的区域。 因此，如果要自定义拖动，则只需自定义按钮的边界即可。
答案 1 :(得分：0)
您需要覆盖continueTracking touchesEnded和class ViewController: UIViewController {
@IBOutlet weak var button: DragButton!
override func viewDidLoad() {
super.viewDidLoad()
}
}
class DragButton: UIButton {
private let _boundsExtension: CGFloat = 0 // Adjust this as needed
override open func continueTracking(_ touch: UITouch, with event: UIEvent?) -> Bool {
let outerBounds: CGRect = bounds.insetBy(dx: CGFloat(-1 * _boundsExtension), dy: CGFloat(-1 * _boundsExtension))
let currentLocation: CGPoint = touch.location(in: self)
let previousLocation: CGPoint = touch.previousLocation(in: self)
let touchOutside: Bool = !outerBounds.contains(currentLocation)
if touchOutside {
let previousTouchInside: Bool = outerBounds.contains(previousLocation)
if previousTouchInside {
print("touchDragExit")
sendActions(for: .touchDragExit)
} else {
print("touchDragOutside")
sendActions(for: .touchDragOutside)
}
} else {
let previousTouchOutside: Bool = !outerBounds.contains(previousLocation)
if previousTouchOutside {
print("touchDragEnter")
sendActions(for: .touchDragEnter)
} else {
print("touchDragInside")
sendActions(for: .touchDragInside)
}
}
return true
}
override open func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {
let touch: UITouch = touches.first!
let outerBounds: CGRect = bounds.insetBy(dx: CGFloat(-1 * _boundsExtension), dy: CGFloat(-1 * _boundsExtension))
let currentLocation: CGPoint = touch.location(in: self)
let touchInside: Bool = outerBounds.contains(currentLocation)
if touchInside {
print("touchUpInside action")
return sendActions(for: .touchUpInside)
} else {
print("touchUpOutside action")
return sendActions(for: .touchUpOutside)
}
}
}
函数。
适应@Dean的链接，实现如下（swift 4.2）：
_boundsExtension尝试更改Ext.define('Test', {
extend: 'Ext.Window',
requires: [
'Ext.form.Panel'
],
autoShow: true,
title: "Test",
width: 350,
items: [{
//Your content panel
xtype: 'panel',
padding:20,
height: 300,
html: 'My Content Panel'
}, {
//Custom button panel
xtype: 'panel',
padding: 10,
layout: {
align: 'middle',
pack: 'center',
type: 'hbox'
},
items: [{
margin: '0 2 0 0',
xtype: 'button',
text: 'Cancel'
}, {
margin: '0 2 0 0',
xtype: 'button',
text: 'Submit'
}, {
margin: '0 2 0 0',
xtype: 'button',
text: 'Reset'
}]
}],
});
Ext.create('Test');
值