我想要显示被触摸和移动的物体的x corrdinate。
尝试一下:
import UIKit
class ViewController: UIViewController {
var location = CGPoint(x: 0, y: 0)
@IBOutlet weak var viewBox: UIView!
@IBOutlet weak var cntInViewBox: UILabel!
override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
let touch = touches.first! as UITouch
location = touch.locationInView(self.view)
viewBox.center = location
/*cntInViewBox.text=String(location.x)*/
}
override func touchesMoved(touches: Set<UITouch>, withEvent event: UIEvent?) {
let touch = touches.first! as UITouch
location = touch.locationInView(self.view)
viewBox.center = location
/*cntInViewBox.text=String(location.x)*/
}
override func viewDidLoad() {
super.viewDidLoad()
viewBox.center = CGPoint(x:0, y: 0)
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
没有线
cntIntViewBox.text=String(location.x)
效果很好。接触到这个场景,viewBox跳起,开始触摸,盒子正在移动。
但是如果我激活线来显示坐标(例如,我的意思是任何动态文本),移动和跳跃就不再起作用了。
为什么会出现这个问题?
答案 0 :(得分:1)
问题是您的专线会更改标签的文字。这会导致在整个界面中执行自动布局。您的viewBox
视图按自动布局约束定位,因此这些约束将接管并用于定位视图。约束没有改变,因此视图不会移动。