Swift button.removeTarget用于View中的所有操作

Question

当我启用UIPanGestureRecognizer时，我会禁用按下的按钮的动作，然后当手势结束时我想重新启用动作

func pan(rec:UIPanGestureRecognizer) {

var p:CGPoint = rec.locationInView(self.view)

var center:CGPoint = CGPointZero

switch rec.state {
case .Began:
    println("began")
    selectedView = view.hitTest(p, withEvent: nil)
    if selectedView != nil {
       self.view.bringSubviewToFront(selectedView!)
    }

case .Changed:
     if let buttonRecognize = rec.view as? UIButton {

button.removeTarget(self, action: Selector("\(title):"), forControlEvents:UIControlEvents.TouchUpInside) // but this disable all
case .Ended:
        println("ended")
        if let subview = selectedView {
            if let button = rec.view as? UIButton {
                if let title = button.titleForState(.Normal){
                    button.addTarget(self, action: Selector("\(title):"), forControlEvents: UIControlEvents.TouchUpInside)
                    selectedView = nil
                }}
    }    
case .Possible:
        println("possible")
    case .Cancelled:
        println("cancelled")
    case .Failed:
        println("failed")
    }}}
}

我试过这种方式，我重新激活了动作，但不知道如何只删除按下按钮的动作？

Answer 1

您可以设置button.enabled = false，而不是删除按钮的目标操作。