[英]How can I drag my UIView only from a specific area of this UIView?
這是我想要的UIView。 它的大部分將被隱藏,並且只能通過拖動小的可見部分將其拖出。
我考慮過將視圖繪制成可以說其容器的90%,然后在頂部繪制一個小矩形(可見部分),但是我遇到了兩個問題:
我該如何實現?
覆蓋pointInside:withEvent:
當該點位於您不想接收觸摸的視圖部分時,返回false。
您可以使用panGesture,在shouldReceiveTouch
檢查觸摸點。
例如
class ViewController: UIViewController,UIGestureRecognizerDelegate {
var panGestureRecognizer:UIPanGestureRecognizer?
override func viewDidLoad() {
panGestureRecognizer = UIPanGestureRecognizer(target: self, action: "gestureRecognizer:");
self.view.userInteractionEnabled = true
self.view.addGestureRecognizer(panGestureRecognizer!)
}
func catchedPan(gesture:UIPanGestureRecognizer){
switch gesture.state{
case .Began:
case .Changed:
//Change frame here
case .Ended:
default:
}
}
func gestureRecognizer(gestureRecognizer: UIGestureRecognizer, shouldReceiveTouch touch: UITouch) -> Bool {
if(gestureRecognizer == panGestureRecognizer){
let point = touch.locationInView(self.view);
if (point inside your area){
return true
}else{
return false
}
}
}
}
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