Swift 立即删除 UIview 并在另一个地方显示动画持续时间 1sec

Question

我想立即从 superview 中删除 UIView 并通过动画在另一个地方显示该视图

我试试这个

    mView.removeFromSuperview()
    
    mView.frame = CGRect.init(x: 0, y: 0, width: 121, height: 58)

    self.view.addSubview(mView)
    
    UIView.transition(with: self.view, duration: 1, options: [.transitionCrossDissolve], animations: {
        self.mView.alpha = 1
    }, completion: nil)

此代码将删除 mView 并同时添加 mView 持续时间 1 秒但我需要立即删除 mView

也许我需要在 mView.removeFromSuperview() 之后更新我的 self.view？

谢谢

我试过了

    func mapView(_ mapView: GMSMapView, didTap marker: GMSMarker) -> Bool {

    self.infoWindow.alpha = 0
    
    self.view.layoutIfNeeded()

    let data = marker.userData as! [String : Any]

    let location = CLLocationCoordinate2D(latitude: (data["latitude"] as! Double), longitude: (data["longitude"] as! Double))

    self.infoWindow = CustomGMSInfoWindow(frame: CGRect.init(x: 0, y: 0, width: 121, height: 58))
    self.infoWindow.center = mapView.projection.point(for: location)
    self.infoWindow.center.y = (infoWindow.center.y) - 65
    self.infoWindow.frame = CGRect(infoWindow.frame.origin.x, infoWindow.frame.origin.y, infoWindow.frame.width, infoWindow.frame.height)

    UIView.animate(withDuration: 1.0) {
        self.infoWindow.alpha = 1.0
    }



    return false
}

Answer 1

运行动画后：

self.view.layoutIfNeeded()

Answer 2

没有理由删除/重新添加 mView。您需要做的就是将其 .alpha 设置为零，更改其帧，然后将 .alpha 动画化回 1（将使其“淡入”。

    // set alpha to Zero (invisible)
    self.mView.alpha = 0.0
        
    // set its new frame
    self.mView.frame = CGRect(x: 0, y: 0, width: 121, height: 58)
    
    // "fade in"
    UIView.animate(withDuration: 1.0) {
        self.mView.alpha = 1.0
    }

这是一个完整的例子。每次点击时，红色 mView 会消失，然后在随机位置“淡入”：

class ViewController: UIViewController {
    
    let mView = UIView()
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        mView.backgroundColor = .red
        mView.frame = CGRect(x: 100, y: 200, width: 121, height: 58)
        view.addSubview(mView)
        
        let tap = UITapGestureRecognizer(target: self, action: #selector(self.doAnim))
        view.addGestureRecognizer(tap)
        
    }
    
    @objc func doAnim() -> Void {
        
        let x = CGFloat.random(in: 0...(view.frame.size.width - 121))
        let y = CGFloat.random(in: 0...(view.frame.size.height - 58))

        // set alpha to Zero (invisible)
        self.mView.alpha = 0.0
        
        // set its new frame
        self.mView.frame = CGRect(x: x, y: y, width: 121, height: 58)
        
        // "fade in"
        UIView.animate(withDuration: 1.0) {
            self.mView.alpha = 1.0
        }
        
    }
    
}

编辑：发布的原始问题不是实际问题

这是您发布的代码，有几处更改。通读评论：

func mapView(_ mapView: GMSMapView, didTap marker: GMSMarker) -> Bool {

    // (1) - if you are creating a NEW view at (3),
    //  remove this view first
    //self.infoWindow.alpha = 0
    self.infoWindow.removeFromSuperview()

    // (2) - not needed
    //self.view.layoutIfNeeded()

    let data = marker.userData as! [String : Any]

    let location = CLLocationCoordinate2D(latitude: (data["latitude"] as! Double), longitude: (data["longitude"] as! Double))

    // (3) - create a NEW view
    self.infoWindow = CustomGMSInfoWindow(frame: CGRect.init(x: 0, y: 0, width: 121, height: 58))
    self.infoWindow.center = mapView.projection.point(for: location)
    self.infoWindow.center.y = (infoWindow.center.y) - 65

    // (4) - this is setting the frame to itself - you don't need this
    self.infoWindow.frame = CGRect(infoWindow.frame.origin.x, infoWindow.frame.origin.y, infoWindow.frame.width, infoWindow.frame.height)

    // (5) - you created a NEW view, so you need to set its alpha here
    self.infoWindow.alpha = 0.0
    
    // (6) - and you need to add it as a subview... I'm assuming it needs to be added to the mapView
    mapView.addSubview(self.infoWindow)
    
    // (7) if this doesn't fade in the new view...
    UIView.animate(withDuration: 1.0) {
        self.infoWindow.alpha = 1.0
    }

    // (8) try it like this - wait 5/100ths of a second before starting the fade-in
    UIView.animate(withDuration: 1.0, delay: 0.05, animations: {
        self.infoWindow.alpha = 1.0
    })

    return false
}

Swift 立即删除 UIview 并在另一个地方显示动画持续时间 1sec

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