Ios UIButton从类实现时不可单击
我有一个类Ios UIButton从类实现时不可单击,ios,swift,uibutton,swift2,Ios,Swift,Uibutton,Swift2,我有一个类ManageCell,它存储框架、设置标签的文本等。。。哪些是UIViewCellView的子视图,它位于ViewController中 ManageCell: 视图控制器: 在cellView[index]、viewBelowButton和deleteButton上都启用了用户交互 我面临的问题是,delete按钮对触摸没有响应。未调用deletebutonpressed:函数 代码: 我不确定这是否是一种好的做法,欢迎您提出任何建议。当然,它不被称为,ViewController。
ManageCell
,它存储框架、设置标签的文本等。。。哪些是UIViewCellView
的子视图,它位于ViewController
中
ManageCell:
视图控制器:
在cellView[index]
、viewBelowButton
和deleteButton
上都启用了用户交互
我面临的问题是,delete按钮
对触摸没有响应。未调用deletebutonpressed:
函数
代码:
我不确定这是否是一种好的做法,欢迎您提出任何建议。当然,它不被称为,
ViewController。self
是一种类类型,而不是您的视图控制器。即使是这样,这也不是一个好的做法。您应该在这里使用委托模式,并返回一些参数,以便区分按下了哪个单元格删除按钮
代码示例:
protocol ManageCellDelegate: class {
func manageCellDeletePressed(id: Int)
}
class ManageCell {
var name: UILabel
var viewBelowButton: UIView
var deleteButton: UIButton
weak var delegate: ManageCellDelegate?
var id: Int
init (id: Int, name: String) {
self.id = id
self.name = UILabel(frame: CGRectMake(10,15,250,40))
self.name.text = name
self.name.sizeToFit()
self.viewBelowButton = UIButton(frame: CGRectMake(UIScreen.mainScreen().bounds.width, 0, 70, 70))
//set outside the visible area so that it can be animated in.
self.viewBelowButton.backgroundColor = UIColor.redColor()
self.deleteButton = UIButton(frame: CGRectMake(0,0,70,70))
self.deleteButton.addTarget(self, action: "deleteButtonPressed:", forControlEvents: UIControlEvents.TouchUpInside)
self.deleteButton.setTitle("delete", forState: .Normal)
}
func deleteButtonPressed(sender: AnyObject) {
self.delegate?.manageCellDeletePressed(id)
}
}
class ViewController: UIViewController {
var cellView: [UIView] = []
var manageCells: [ManageCell] = []
func fullManageCells() {
for id in 0...15 {
let manageCell = ManageCell(id: id, name: "something")
manageCell.delegate = self
manageCells.append(manageCell)
}
}
}
extension ViewController: ManageCellDelegate {
func manageCellDeletePressed(id: Int) {
println("button with id \(id) pressed")
}
}
听起来按钮好像在它的一个超级视图的框架之外。尝试将所有相关视图的
clipstobunds
设置为true
。如果我是正确的,您将无法再看到按钮(或至少部分按钮)。为什么不在ViewController类中添加按钮时添加Target?这样,选择器将位于同一类中。按照Aaron正确的建议检查框架。@GurtejSingh说得对。这是另一个问题,尽管点击按钮甚至没有注册,否则OP会崩溃。@AaronBrager同意!但我怀疑问题出在ViewController.self。我想这不是一个例子。@GurtejSingh,我将addTarget
移动到ViewController
,现在它是cell.deleteButton.addTarget(self,action:“self.deleteButtonPressed:”,forControlEvents:UIControlEvents.TouchUpInside)
,但仍然是空的。是的,关于车祸你说得对,奇怪的是我没有车祸@AaronBrager,我确实将viewBelowButton
移动到了屏幕的框架中,并删除了动画(以确保deleteButton
已使用其正下方的所有超级视图初始化),并使用了clipToBounds
,但是没有更改。有一个错误-'ManageCell'在self.delegate?.manageCekkDeletePressed(id)
和cell.delegate=self
ViewController的行中没有名为“delegate”的成员。self
是类
类型的一个实例。如果这是唯一的问题,那么就会出现“无法识别的选择器”崩溃。第一个问题是操作根本没有被触发。@an23lm您似乎错过了我的示例中的弱var
行哦,是的,我错过了。好的,我现在包括了它,现在没有错误,但仍然没有函数调用…可能是Xcode测试版中的一些bug。因为,我在ViewController
中创建了一个按钮数组,并将它们添加到ViewController
文件中的CellView
中,甚至在初始化期间确保所有按钮的superview都在屏幕的范围内。奇怪的是,我有另一个按钮,我用main.storyboard
设置它,效果很好。
var cellView: [UIView] = []
var manageCells: [ManageCell] = []
...
//fill the manageCells array
func setSubViews () {
for (index, cell) in manageCells.enumerate() {
cellView.append(UIView(frame: CGRectMake(0, originY, view.bounds.width, 70)
cellView[index].addSubview(cell.name)
cellView[index].addSubview(cell.viewBelowButton)
cell.viewBelowButton.addSubview(cell.deleteButton)
}
}
func editing () {
var frame = CGRectMake(view.bound.width - 70, 0, 0, 70)
for cell in cells {
UIView.animateWithDuration(0.2, animations: {
cell.viewBelowButton.frame = frame
}
}
}
func deleteButtonPressed(sender: UIButton) {
print("button pressed")
}
protocol ManageCellDelegate: class {
func manageCellDeletePressed(id: Int)
}
class ManageCell {
var name: UILabel
var viewBelowButton: UIView
var deleteButton: UIButton
weak var delegate: ManageCellDelegate?
var id: Int
init (id: Int, name: String) {
self.id = id
self.name = UILabel(frame: CGRectMake(10,15,250,40))
self.name.text = name
self.name.sizeToFit()
self.viewBelowButton = UIButton(frame: CGRectMake(UIScreen.mainScreen().bounds.width, 0, 70, 70))
//set outside the visible area so that it can be animated in.
self.viewBelowButton.backgroundColor = UIColor.redColor()
self.deleteButton = UIButton(frame: CGRectMake(0,0,70,70))
self.deleteButton.addTarget(self, action: "deleteButtonPressed:", forControlEvents: UIControlEvents.TouchUpInside)
self.deleteButton.setTitle("delete", forState: .Normal)
}
func deleteButtonPressed(sender: AnyObject) {
self.delegate?.manageCellDeletePressed(id)
}
}
class ViewController: UIViewController {
var cellView: [UIView] = []
var manageCells: [ManageCell] = []
func fullManageCells() {
for id in 0...15 {
let manageCell = ManageCell(id: id, name: "something")
manageCell.delegate = self
manageCells.append(manageCell)
}
}
}
extension ViewController: ManageCellDelegate {
func manageCellDeletePressed(id: Int) {
println("button with id \(id) pressed")
}
}